7Baggers

Pinnacle West Capital Corporation
(NYSE:PNW) 

PNW stock logo

Pinnacle West Capital Corporation, through its subsidiary, Arizona Public Service Company, provides retail and wholesale electric services primarily in the state of Arizona. The company engages in the generation, transmission, and distribution of electricity using coal, nuclear, gas, oil, and solar ...

Founded: 1985
Full Time Employees: 6,210
Sector: Utilities
Industry: Utilities-Regulated Electric

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    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 
                                                                                                
      operating revenues
    1,149,597,000 1,128,167,000 1,820,741,000 1,358,751,000 1,032,280,000 1,095,408,000 1,768,801,000 1,308,994,000 951,712,000 991,574,000 1,637,759,000 1,121,703,000 944,955,000 1,009,314,000 1,469,871,000 1,061,669,000 783,531,000 798,857,000 1,308,254,000 1,000,249,000 696,475,000 740,961,000 1,254,501,000 929,590,000 661,930,000 670,391,000 1,190,787,000 869,501,000 740,530,000 756,376,000 1,268,034,000 974,123,000 692,714,000 759,659,000 1,183,322,000 944,587,000 677,728,000 739,199,000 1,166,922,000 915,394,000 677,167,000 734,430,000 1,199,146,000 890,648,000 671,219,000 726,450,000 1,172,667,000 906,264,000 686,251,000 699,762,000 1,152,392,000 915,822,000 686,652,000 693,122,000 1,109,475,000 878,576,000 620,631,000                                    
      operating expenses
                                                                                                
      fuel and purchased power
    436,729,000 420,372,000 655,969,000 477,008,000 380,071,000 396,148,000 631,382,000 437,172,000 357,864,000 375,879,000 614,520,000 407,754,000 394,504,000 455,316,000 556,571,000 352,187,000 265,269,000 257,037,000 427,452,000 269,835,000 198,227,000 213,345,000 353,171,000 238,382,000 188,521,000 224,565,000 344,862,000 242,222,000 230,588,000 231,983,000 389,936,000 257,087,000 197,110,000 203,826,000 310,469,000 254,611,000 212,395,000 243,257,000 336,120,000 274,848,000 221,285,000 232,737,000 363,847,000 281,477,000 223,237,000 256,828,000 382,361,000 290,854,000 249,786,000 236,493,000 350,953,000 277,584,000 230,679,000 210,864,000 302,894,000 264,723,000 216,309,000                                    
      operations and maintenance
    276,700,000 298,734,000 299,617,000 286,605,000 300,109,000 327,251,000 308,061,000 272,266,000 257,578,000 281,388,000 250,019,000 277,238,000 250,080,000 271,680,000 251,663,000 245,387,000 218,342,000 261,936,000 232,386,000 229,690,000 230,055,000 281,229,000 236,971,000 219,392,000 221,318,000 229,857,000 238,582,000 227,543,000 245,634,000 256,120,000 246,545,000 268,397,000 265,682,000 266,149,000 224,305,000 214,013,000 219,976,000 208,277,000 217,568,000 242,279,000 243,195,000 222,019,000 220,449,000 210,965,000 214,944,000 260,503,000 223,418,000 211,222,000 212,882,000 238,854,000 233,323,000 229,300,000 223,250,000 237,141,000 220,729,000 216,236,000 210,663,000 228,632,000 210,035,000 210,590,000 256,486,000 232,991,000 221,469,000 215,104,000 209,991,000 232,812,000 208,769,000 226,245,000 207,531,000 206,492,000 212,327,000 194,909,000 194,124,000 207,398,000 178,419,000 177,310,000 171,578,000 180,122,000 164,396,000 168,332,000 178,427,000 168,706,000 158,940,000 153,097,000 156,496,000 159,431,000 160,765,000 140,245,000 138,656,000 140,244,000 133,852,000 141,519,000 
      depreciation and amortization
    239,858,000 226,955,000 224,555,000 228,893,000 234,940,000 230,585,000 229,450,000 225,017,000 210,294,000 203,598,000 203,438,000 195,101,000 191,906,000 189,704,000 190,389,000 186,497,000 186,605,000 170,782,000 163,523,000 158,750,000 157,820,000 155,121,000 152,696,000 152,482,000 154,079,000 145,398,000 149,450,000 147,374,000 148,707,000 146,122,000 145,971,000 145,436,000 144,825,000 146,840,000 133,912,000 125,739,000 127,627,000 122,852,000 120,428,000 123,073,000 119,476,000 125,109,000 125,625,000 122,739,000 120,949,000 106,776,000 103,660,000 105,150,000 101,772,000 98,298,000 107,388,000 106,292,000 103,730,000 103,268,000 100,353,000 100,606,000 100,109,000 107,504,000 106,350,000 106,617,000 106,601,000 106,691,000 104,194,000 103,017,000 101,536,000 102,076,000 102,273,000 100,063,000 99,921,000 98,399,000 98,568,000 97,784,000 95,607,000 95,921,000 95,059,000 92,835,000 89,621,000 91,336,000 90,390,000 89,297,000 87,621,000 85,622,000 87,123,000 85,142,000 94,231,000 98,186,000 97,349,000 104,241,000 101,504,000 114,672,000 110,997,000 107,076,000 
      taxes other than income taxes
    61,972,000 59,376,000 58,416,000 57,651,000 59,354,000 56,803,000 52,777,000 58,651,000 59,164,000 56,064,000 53,169,000 57,642,000 57,138,000 54,779,000 53,475,000 54,118,000 57,998,000 58,053,000 57,608,000 59,495,000 59,483,000 56,321,000 54,978,000 56,768,000 56,768,000 54,590,000 53,809,000 55,090,000 55,090,000 54,267,000 51,375,000 53,607,000 53,600,000 51,053,000 45,169,000 44,289,000 43,836,000 40,597,000 41,284,000 42,117,000 42,501,000 42,323,000 43,241,000 43,032,000 43,216,000 41,596,000 40,850,000 44,004,000 45,845,000 40,076,000 43,256,000 40,814,000 40,021,000 39,052,000 36,507,000 41,289,000 42,475,000 35,406,000 34,223,000 40,155,000 37,624,000 34,398,000 37,528,000 31,684,000 31,827,000 22,537,000 34,111,000 32,887,000 34,128,000 30,510,000 28,423,000 33,251,000 33,152,000 23,802,000 34,940,000 34,757,000 34,719,000 28,425,000 31,697,000 32,700,000 35,573,000 28,512,000 34,325,000 34,638,000 35,190,000 27,705,000 31,649,000 32,532,000 30,330,000 25,419,000 28,206,000 28,149,000 
      other expense
    3,164,000 1,720,000 338,000 1,042,000 584,000 83,000 145,000 2,141,000 20,000 -9,140,000 -6,972,000 -4,813,000 -4,131,000 -37,634,000 -6,745,000 -4,584,000  -3,804,750 -6,182,000 -5,184,000    -4,036,000    -4,350,000 -4,358,000 -5,903,000 -5,063,000 -3,771,000  -9,044,000 -4,993,000  -3,680,000 -3,021,250 -5,205,000 -2,842,000 -4,038,000                                 -12,198,000 -6,744,000 -3,269,000      -13,731,000 -4,915,000 -3,846,000  -3,611,000 -4,568,000   -3,769,750 -5,791,000  
      total
    1,018,423,000 1,007,157,000 1,238,895,000 1,051,199,000 975,058,000 1,010,870,000 1,221,815,000 995,247,000 884,920,000 917,194,000 1,121,496,000 938,423,000 894,238,000 972,563,000 1,052,298,000 838,574,000 729,039,000 748,840,000 878,881,000 721,863,000 648,941,000 710,113,000 799,493,000 667,716,000 621,508,000 658,394,000 787,497,000 672,912,000 680,446,000 689,492,000 834,727,000 731,961,000 661,380,000 669,049,000 717,240,000 640,358,000 604,222,000 616,383,000 715,664,000 683,646,000 627,005,000 624,596,000 754,035,000 658,675,000 603,535,000 666,266,000 750,892,000 652,151,000 611,081,000 615,862,000 736,704,000 656,010,000 599,729,000 591,833,000 661,505,000 624,087,000 572,624,000 667,892,000 1,124,841,000 799,799,000 659,575,000 683,611,000 1,139,085,000 820,594,000 633,591,000 687,846,000 1,143,077,000 840,055,000 629,393,000 624,170,000 1,079,975,000 926,193,000 736,738,000 759,116,000 1,205,934,000 863,435,000 695,135,000 730,072,000 1,076,442,000 925,028,000 670,206,000 691,672,000 955,583,000 755,836,000 615,087,000 734,718,000 886,779,000 722,686,000 574,369,000   757,483,000 
      operating income
    131,174,000 121,010,000 581,846,000 307,552,000 57,222,000 84,538,000 546,986,000 313,747,000 66,792,000 74,380,000 516,263,000 183,280,000 50,717,000 36,751,000 417,573,000 223,095,000 54,492,000 50,017,000 429,373,000 278,386,000 47,534,000 30,848,000 455,008,000 261,874,000 40,422,000 11,997,000 403,290,000 196,589,000 60,084,000 66,884,000 433,307,000 242,162,000 31,334,000 90,610,000 466,082,000 304,229,000 73,506,000 122,816,000 451,258,000 231,748,000 50,162,000 109,834,000 445,111,000 231,973,000 67,684,000 60,184,000 421,775,000 254,113,000 75,170,000 83,900,000 415,688,000 259,812,000 86,923,000 101,289,000 447,970,000 254,489,000 48,007,000 78,715,000 435,017,000 196,992,000 37,141,000 59,318,000 403,625,000 203,273,000 37,634,000 25,690,000 344,511,000 157,103,000 -207,629,000 -14,290,000 273,913,000 178,875,000 38,798,000 53,799,000 338,777,000 158,686,000 67,989,000 60,070,000 310,440,000 191,197,000 57,163,000 82,787,000 162,113,000 178,627,000 85,256,000 90,745,000 210,836,000 121,160,000 83,371,000 81,466,000 198,850,000 132,482,000 
      yoy
    129.24% 43.14% 6.37% -1.97% -14.33% 13.66% 5.95% 71.18% 31.70% 102.39% 23.63% -17.85% -6.93% -26.52% -2.75% -19.86% 14.64% 62.14% -5.63% 6.31% 17.59% 157.13% 12.82% 33.21% -32.72% -82.06% -6.93% -18.82% 91.75% -26.18% -7.03% -20.40% -57.37% -26.22% 3.29% 31.28% 46.54% 11.82% 1.38% -0.10% -25.89% 82.50% 5.53% -8.71% -9.96% -28.27% 1.46% -2.19% -13.52% -17.17% -7.21% 2.09% 81.06% 28.68% 2.98% 29.19% 29.26% 32.70% 7.78% -3.09% -1.31% 130.90% 17.16% 29.39% -118.13% -279.78% 25.77% -12.17% -635.15% -126.56% -19.15% 12.72% -42.93% -10.44% 9.13% -17.00% 18.94% -27.44% 91.50% 7.04% -32.95% -8.77% -23.11% 47.43% 2.26% 11.39% 6.03% -8.55%     
      qoq
    8.40% -79.20% 89.19% 437.47% -32.31% -84.54% 74.34% 369.74% -10.20% -85.59% 181.68% 261.38% 38.00% -91.20% 87.17% 309.41% 8.95% -88.35% 54.24% 485.66% 54.09% -93.22% 73.75% 547.85% 236.93% -97.03% 105.14% 227.19% -10.17% -84.56% 78.93% 672.84% -65.42% -80.56% 53.20% 313.88% -40.15% -72.78% 94.72% 362.00% -54.33% -75.32% 91.88% 242.73% 12.46% -85.73% 65.98% 238.05% -10.41% -79.82% 60.00% 198.90% -14.18% -77.39% 76.03% 430.11% -39.01% -81.91% 120.83% 430.39% -37.39% -85.30% 98.56% 440.13% 46.49% -92.54% 119.29% -175.67% 1352.97% -105.22% 53.13% 361.04% -27.88% -84.12% 113.49% 133.40% 13.18% -80.65% 62.37% 234.48% -30.95% -48.93% -9.24% 109.52% -6.05% -56.96% 74.01% 45.33% 2.34% -59.03% 50.10%  
      other income
    4,981,000 7,368,000 12,473,000 12,104,000 17,461,000 5,380,000 6,774,000 5,885,000 30,607,000 5,242,000 15,941,000 6,406,000 6,077,000 2,311,000 2,219,000 1,682,000 1,704,000 8,381,000 12,083,000 12,207,000 12,429,000 13,815,000 13,881,000 16,670,000 12,569,000 15,018,000 15,191,000 12,885,000 7,169,000 7,355,000 6,958,000 6,598,000 3,985,000 1,951,000 1,091,000 484,000 480,000 516,000 71,000 197,000 117,000 72,000 139,000 175,000 235,000 2,094,000 2,366,000 2,781,000 2,367,000 317,000 160,000 469,000 758,000 249,000 420,000 177,000 760,000 481,000 441,000 557,000 1,690,000 2,540,000 4,348,000 933,000 2,395,000 1,217,000 4,488,000 6,587,000 380,000 2,028,000 2,274,000 3,928,000 3,848,000 12,718,000 4,276,000 5,869,000 4,512,000 9,568,000 5,610,000 12,022,000 5,467,000 5,341,000 8,694,000 8,684,000 1,744,000 3,336,000 2,836,000 36,541,000 11,412,000 21,677,000 5,533,000 2,698,000 
      allowance for equity funds used during construction
    14,782,000 15,459,000 17,671,000 14,767,000 13,249,000 9,830,000 9,588,000 8,910,000 10,292,000 13,047,000 11,976,000 13,034,000 15,061,000 14,297,000 9,133,000 12,086,000 9,747,000 11,188,000 11,352,000 9,990,000 9,207,000 9,124,000 8,144,000 8,811,000 7,697,000 6,754,000 5,917,000 7,572,000 11,188,000 12,908,000 12,259,000 13,073,000 14,079,000 14,345,000 12,728,000 10,456,000 9,482,000 11,061,000 10,194,000 10,369,000 10,516,000 9,001,000 7,645,000 9,345,000 9,224,000 8,811,000 7,038,000 7,499,000 7,442,000 6,883,000 5,569,000 6,265,000 6,864,000 6,797,000 5,708,000 5,175,000 4,756,000 5,010,000 7,378,000 5,924,000 5,395,000 5,649,000 5,524,000 5,504,000 5,389,000 3,080,000 2,197,000 4,730,000 4,992,000 2,425,000 4,673,000 5,414,000 6,124,000 6,321,000 5,235,000 5,195,000 4,444,000 3,700,000 3,178,000 3,633,000 3,801,000 2,784,000 2,852,000 2,952,000 2,603,000 2,026,000 -1,327,000 2,184,000 2,002,000 3,046,000 11,194,000  
      pension and other postretirement non-service credits
    3,982,000 2,993,000 2,777,000 3,692,000                                                                                         
      interest expense
                                                                                                
      interest charges
    125,759,000 126,052,000 125,179,000 113,527,000 104,943,000 107,152,000 109,925,000 108,891,000 99,774,000 96,027,000 96,909,000 93,832,000 88,119,000 77,892,000 72,185,000 68,103,000 65,389,000 65,532,000 64,067,000 62,777,000 61,938,000 64,080,000 61,497,000 62,690,000 59,234,000 59,652,000 57,481,000 57,465,000 60,653,000 62,198,000 61,605,000 60,708,000 58,954,000 57,319,000 55,644,000 54,969,000 51,864,000 50,834,000 51,293,000 52,849,000 50,744,000 48,895,000 49,342,000 48,328,000 48,399,000 48,604,000 47,626,000 51,751,000 52,969,000 50,516,000 50,587,000 51,307,000 49,478,000 52,407,000 52,242,000 53,000,000 56,967,000 58,744,000 62,034,000 60,140,000 61,077,000 62,237,000 60,491,000 60,741,000 62,054,000 58,874,000 60,244,000 58,951,000 55,806,000 58,710,000 51,231,000 51,583,000 54,766,000 54,268,000 54,393,000 52,967,000 50,992,000 52,841,000 50,577,000 45,882,000 47,526,000 42,267,000 47,046,000 49,781,000 49,195,000 51,214,000 49,497,000 44,854,000 50,356,000 53,051,000 52,571,000 51,117,000 
      allowance for borrowed funds used during construction
    -9,863,000 -12,093,000 -13,979,000 -11,559,000 -10,102,000 -12,192,000 -11,901,000 -11,036,000 -13,141,000 -9,433,000 -9,092,000 -12,317,000 -12,722,000 -8,983,000 -8,692,000 -5,873,000 -4,482,000 -5,586,000 -5,273,000 -5,199,000 -4,994,000 -5,042,000 -4,663,000 -4,749,000 -4,076,000 -3,883,000 -3,486,000 -4,494,000 -6,665,000 -6,221,000 -5,913,000 -6,291,000 -6,755,000 -6,734,000 -6,000,000 -4,906,000 -4,472,000 -5,121,000 -4,321,000 -5,301,000 -5,227,000 -4,203,000 -3,518,000 -4,322,000 -4,216,000 -4,418,000 -3,479,000              -3,576,000 -4,225,000 -6,163,000 -3,104,000                             
      income before income taxes
    36,283,000 17,594,000 495,408,000 231,888,000 -6,521,000 -2,531,000 473,499,000 240,532,000 25,059,000 7,070,000 459,565,000 126,866,000 2,192,000 -28,436,000 383,360,000 195,306,000 25,423,000 27,903,000 415,967,000 265,996,000 36,164,000 -34,431,000 428,479,000 239,520,000 14,657,000 -19,683,000 370,415,000 166,099,000 25,209,000 37,744,000 404,218,000 215,651,000 6,829,000 47,277,000 425,264,000 261,284,000 32,396,000 85,428,000 409,346,000 191,924,000 11,240,000 68,825,000 401,533,000 194,878,000 28,674,000 157,464,750 382,839,000 215,924,000 31,096,000                                            
      income taxes
    1,169,000 -3,000 77,894,000 35,018,000 -6,183,000 -10,000 74,227,000 32,421,000 3,891,000 2,787,000 57,045,000 15,897,000 1,183,000 -8,750,000 52,728,000 26,688,000 4,161,000 -3,987,000 71,863,000 46,560,000 -4,350,000 -19,913,000 77,234,000 41,061,000 -20,209,000 -88,537,000 53,266,000 17,080,000 2,418,000 6,795,000 84,333,000 44,039,000 -1,265,000 20,775,000 144,319,000 88,967,000 4,211,000 27,309,000 141,446,000 65,742,000 1,914,000 22,847,000 139,555,000 67,371,000 7,947,000 5,007,000 134,753,000 74,540,000 6,405,000 9,167,000 131,912,000 77,043,000 12,469,000 18,157,000 147,116,000 76,689,000  7,375,000 131,416,000 50,818,000 -5,649,000 -3,822,000 123,486,000 51,829,000 -15,480,000 -7,480,000 103,061,000 37,600,000 -96,174,000 -27,082,000 75,970,000 17,076,000 -557,000 10,492,000 91,588,000 118,727,000 8,609,000 1,518,000 98,836,000 49,271,000 6,793,000 13,029,000 40,305,000 55,024,000 14,732,000 11,283,000 58,900,000 44,027,000 15,627,000 7,030,000 50,528,000 35,248,000 
      net income
    35,114,000 17,597,000 417,514,000 196,870,000 -338,000 -2,521,000 399,272,000 208,111,000 21,168,000 4,283,000 402,520,000 110,969,000 1,009,000 -19,686,000 330,632,000 168,618,000 21,262,000 31,890,000 344,104,000 219,436,000 40,514,000 -14,518,000 351,245,000 198,459,000 34,866,000 68,854,000 317,149,000 149,019,000 22,791,000 30,949,000 319,885,000 171,612,000 8,094,000 26,502,000 280,945,000 172,317,000 28,185,000 58,119,000 267,900,000 126,182,000 9,326,000 45,978,000 261,978,000 127,507,000 20,727,000 9,535,000 248,086,000 141,384,000 24,691,000 32,814,000 234,718,000 139,598,000 32,836,000 30,671,000 252,863,000 130,111,000  19,990,000 262,785,000 93,839,000 -9,674,000 12,501,000 239,039,000 119,566,000 -897,000 -29,990,000 186,070,000 68,195,000 -170,720,000 -38,850,000 151,586,000 133,862,000 -4,473,000 2,911,000 208,708,000 78,994,000 16,530,000 18,479,000 184,167,000 112,154,000 12,455,000 21,347,000 103,737,000 26,735,000 24,448,000 33,729,000 105,400,000 71,370,000 30,156,000 49,091,000 110,048,000 56,142,000 
      yoy
    -10488.76% -798.02% 4.57% -5.40% -101.60% -158.86% -0.81% 87.54% 1997.92% -121.76% 21.74% -34.19% -95.25% -161.73% -3.92% -23.16% -47.52% -319.66% -2.03% 10.57% 16.20% -121.09% 10.75% 33.18% 52.98% 122.48% -0.86% -13.17% 181.58% 16.78% 13.86% -0.41% -71.28% -54.40% 4.87% 36.56% 202.22% 26.41% 2.26% -1.04% -55.01% 382.20% 5.60% -9.82% -16.05% -70.94% 5.70% 1.28% -24.81% 6.99% -7.18% 7.29%  53.43% -3.78% 38.65%  59.91% 9.93% -21.52% 978.48% -141.68% 28.47% 75.33% -99.47% -22.81% 22.75% -49.06% 3716.68% -1434.59% -27.37% 69.46% -127.06% -84.25% 13.33% -29.57% 32.72% -13.44% 77.53% 319.50% -49.06% -36.71% -1.58% -62.54% -18.93% -31.29% -4.22% 27.12%     
      qoq
    99.55% -95.79% 112.08% -58345.56% -86.59% -100.63% 91.86% 883.14% 394.23% -98.94% 262.73% 10897.92% -105.13% -105.95% 96.08% 693.05% -33.33% -90.73% 56.81% 441.63% -379.06% -104.13% 76.99% 469.20% -49.36% -78.29% 112.82% 553.85% -26.36% -90.32% 86.40% 2020.24% -69.46% -90.57% 63.04% 511.38% -51.50% -78.31% 112.31% 1253.01% -79.72% -82.45% 105.46% 515.17% 117.38% -96.16% 75.47% 472.61% -24.75% -86.02% 68.14% 325.14% 7.06% -87.87% 94.34%   -92.39% 180.04% -1070.01% -177.39% -94.77% 99.92% -13429.54% -97.01% -116.12% 172.85% -139.95% 339.43% -125.63% 13.24% -3092.67% -253.66% -98.61% 164.21% 377.88% -10.55% -89.97% 64.21% 800.47% -41.65% -79.42% 288.02% 9.35% -27.52% -68.00% 47.68% 136.67% -38.57% -55.39% 96.02%  
      less: net income attributable to noncontrolling interests
    2,194,000 2,194,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 4,306,000 3,739,000 4,873,000 4,873,000 4,873,000 4,874,000 4,873,000 4,873,000 4,873,000 4,874,000 4,873,000 4,873,000 4,873,000 4,874,000 4,873,000 4,873,000 4,873,000 4,874,000 4,873,000 4,873,000 4,873,000 4,874,000 4,873,000 4,861,000 4,862,000 4,605,000 4,605,000 4,125,000 4,125,000 8,926,000 8,925,000 8,554,000 8,555,000 8,391,000 8,392,000 8,040,000 8,040,000 7,766,000 7,776,000 7,426,000 7,426,000 7,154,000 5,461,000 5,151,000 5,119,000 4,769,000 5,117,000 169,000 -582,000 -152,000 -14,210,000                        
      net income attributable to common shareholders
    32,920,000 15,403,000 413,208,000 192,564,000 -4,644,000 -6,827,000 394,966,000 203,805,000 16,862,000 -23,000 398,214,000 106,663,000 -3,297,000 -23,992,000 326,326,000 164,312,000 16,956,000 27,584,000 339,798,000 215,697,000 35,641,000 -19,391,000 346,372,000 193,585,000 29,993,000 63,981,000 312,276,000 144,145,000 17,918,000 26,076,000 315,012,000 166,738,000 3,221,000 21,629,000 276,072,000 167,443,000 23,312,000 53,246,000 263,027,000 121,308,000 4,453,000 41,117,000 257,116,000 122,902,000 16,122,000 5,410,000 243,961,000 132,458,000 15,766,000 24,260,000 226,163,000 131,207,000 24,444,000 22,631,000 244,823,000 122,345,000 -8,257,000 12,564,000 255,359,000 86,685,000 -15,135,000 7,350,000 233,920,000 114,797,000 -6,014,000 -30,159,000 186,652,000 68,347,000 -156,510,000                        
      weighted-average common shares outstanding - basic
    121,360,000  119,623,000 119,517,000 119,594,000  113,729,000 113,695,000 113,621,000  113,464,000 113,411,000 113,358,000  113,211,000 113,172,000 113,102,000  112,923,000                                                                     91,315,000 91,294,000    
      weighted-average common shares outstanding - diluted
    123,778,000  121,956,000 121,865,000 119,594,000  117,119,000 115,803,000 114,227,000  113,838,000 113,717,000 113,358,000                                                                           91,400,000 91,376,000    
      earnings per weighted-average common share outstanding
                                                                                                
      net income attributable to common shareholders - basic
    270 1,257.5 3,450 1,610 -40 1,355 3,470 1,790 150 1,105 3,510 940 -30 1,122.5 2,880 1,450 150 1,310 3,010                                                                          
      net income attributable to common shareholders - diluted
    270 1,232.5 3,390 1,580 -40 1,330 3,370 1,760 150 1,102.5 3,500 940 -30 1,120 2,880 1,450 150 1,305 3,000                                                                          
      pension and other postretirement non-service credits - net
        2,958,000 9,158,250 12,188,000 12,877,000 11,568,000 7,628,250 10,174,000 10,474,000 9,865,000 18,434,750 24,673,000 25,257,000 23,809,000 21,025,250 28,135,000   14,170,000 14,118,000 14,142,000 13,911,000 5,749,000 5,752,000 6,374,000 5,114,000 12,477,000 12,449,000 12,006,000 12,859,000                                                            
      other expenses
             265,000 350,000 688,000 610,000   385,000    4,093,000    692,000    683,000 427,000 1,000,000 900,000 7,434,000  1,181,000 3,385,000  388,000 535,250 264,000 1,329,000 548,000                                 10,388,000 11,246,000 8,803,000      12,536,000 13,521,000 17,556,000  8,215,000 9,568,000   12,845,000 19,650,000 22,509,000 
      other expenses - net
                 352,500 200,000   1,340,250 -2,088,000                                                                          
      weighted-average common shares outstanding -diluted
                  113,463,000 113,369,000 113,295,000  113,217,000                                                                          
      other incomes
                    825,000    3,356,000 4,097,000 1,677,000  822,000 3,984,000 794,000      163,000   1,706,000      631,000 873,000 462,000 1,189,000 563,000 603,000 921,000 796,000 2,141,000 1,784,000 2,020,000 2,049,000 1,508,000 1,022,000 1,233,000 3,068,000 2,123,000 1,320,000 1,396,000 9,716,000 24,642,000 18,365,000 15,716,000 8,061,000 10,309,000 8,014,000 7,733,000 6,467,000 13,090,000 8,321,000 6,822,000 5,938,000    8,488,000 5,640,500  8,430,000 8,522,000    8,374,000   16,141,000 16,443,000    
      pension and other postretirement non-service credits — net
                       28,175,000 27,791,000                                                                        
      weighted-average common shares outstanding — basic
     119,687,000    113,846,000    113,442,000    113,196,000    112,910,000  112,882,000 112,829,000 112,666,000 112,679,000 112,638,000 112,594,000 112,443,000 112,463,000 112,337,000 112,337,000 112,129,000 112,148,000 112,115,000 112,017,000 111,839,000 111,835,000 111,797,000 111,728,000 111,409,000 111,416,000 111,368,000 111,296,000 111,026,000 111,036,000 110,986,000 110,916,000 110,626,000 110,686,000 110,565,000 110,257,000 109,984,000 110,009,000 109,962,000 109,832,000 109,510,000 109,555,000 109,491,000 109,299,000 109,053,000 109,128,000 109,044,000 108,832,000 106,573,000 108,632,000 107,355,000 101,474,000 101,161,000 101,223,000 101,109,000 100,986,000  100,750,000 100,653,000           98,697,000 96,192,000 91,962,000  91,357,000    91,271,000 91,258,000 
      weighted-average common shares outstanding — diluted
     121,971,000    116,232,000    113,804,000    113,416,000    113,192,000  113,223,000 113,093,000 112,942,000 112,987,000 112,879,000 112,862,000 112,758,000 112,746,000 112,651,000 112,735,000 112,550,000 112,533,000 112,471,000 112,493,000 112,367,000 112,401,000 112,345,000 112,195,000 112,046,000 112,100,000 112,004,000 111,847,000 111,552,000 111,616,000 111,460,000 111,377,000 111,178,000 111,103,000 111,002,000 110,888,000 110,806,000 111,053,000 110,932,000 110,835,000 110,527,000 110,655,000 110,359,000 109,299,000 109,864,000 109,861,000 109,718,000 108,832,000 107,138,000 109,094,000 107,764,000 101,474,000 101,264,000 101,385,000 101,193,000 100,986,000  101,018,000 100,917,000           98,816,000 96,299,000 92,045,000  91,491,000    91,467,000 91,450,000 
      net income attributable to common shareholders — basic
                       1,910 320 -170 3,070 1,720 270 570 2,780 1,280 160 230 2,810 1,490 30 190 2,470 1,500 210 480 2,360 1,090 40 370 2,320 1,110 150 40 2,200 1,200 140 220 2,060 1,190 220 200 2,230 1,120  110 2,340 800 -140 40 2,150 1,070 -60 -290 1,840 680 -1,550                        
      net income attributable to common shareholders — diluted
                       1,910 320 -180 3,070 1,710 270 560 2,770 1,280 160 230 2,800 1,480 30 190 2,460 1,490 210 480 2,350 1,080 40 370 2,300 1,100 140 50 2,200 1,190 140 220 2,040 1,180 220 200 2,210 1,110  110 2,320 790 -140 50 2,140 1,070 -60 -300 1,840 680 -1,550                        
      dividends declared per share
                                   1.39  0.328  1.31  0.313  1.25  0.298  1.19  0.285  1.14  0.273  1.09  1.095  1.05 0.525 0.525  1.05 0.525 0.525  1.05 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.525 0.5  0.5 0.475  0.95 0.475 0.45 0.45 0.45 0.445 0.425 0.425 
      income from continuing operations before income taxes
                                                     41,981,000 366,630,000 216,641,000 45,305,000 53,062,000 399,990,000 207,619,000  26,919,000 384,689,000 144,003,000 -14,974,000 8,381,000 355,314,000 146,413,000 -16,252,000 -32,092,000 290,441,000 108,593,000 -263,970,000 -73,793,000 226,473,000 131,509,000 -5,225,000 13,980,000 292,586,000  24,407,000 12,044,000 283,015,000 160,114,000 18,388,000 36,798,000 124,999,000 140,180,000 38,388,000 40,601,000 162,786,000 115,084,000 45,395,000 53,026,000 160,066,000 90,137,000 
      income from continuing operations
                                                     32,814,000 234,718,000 139,598,000 32,836,000 34,905,000 252,874,000 130,930,000 284,000 19,544,000 253,273,000 93,185,000 -9,325,000 12,203,000 231,828,000 94,584,000 -772,000 -24,612,000 187,380,000 70,993,000 -167,796,000 -46,711,000 150,503,000 114,433,000 -4,668,000 3,488,000 200,998,000 78,496,000 15,798,000 10,526,000 184,179,000 110,843,000 11,595,000 23,769,000 84,694,000 85,156,000 23,656,000 29,318,000 103,886,000 71,057,000 29,768,000 45,996,000 109,538,000 54,889,000 
      income from discontinued operations
                                                                                                
      net of income tax benefit of 7
                                                                                                
      income from continuing operations attributable to common shareholders — basic
                                                     220 2,060 1,190 220 250 2,230 1,120 -70 110 2,250 790 -140 40 2,090 840 -60 -250 1,860 700 -1,520                        
      income from continuing operations attributable to common shareholders — diluted
                                                     220 2,040 1,180 220 240 2,210 1,120  110 2,240 780 -140 40 2,080 830 -60 -250 1,850 700 -1,520                        
      amounts attributable to common shareholders:
                                                                                                
      income from continuing operations, net of tax
                                                     405,692,186 226,163 131,207 24,444 26,865 244,834 123,164 -7,483 12,109 245,838 86,001 -14,795 7,074 226,700 89,806 -5,889 -24,781 187,962 71,145 -153,586                        
      discontinued operations, net of tax
                                                             455 9,521 684 -340 276 7,220 24,991 -125 -5,378 -1,310 -2,798 -2,924                        
      net of income tax benefit of 535
                                                                                                
      net of income tax benefit of
                                                                     -5,378,000 -1,310,000 -2,798,000 -2,924,000                        
      net of income tax benefit of and 6,216
                                                                                                
      regulated electricity
                                                             666,502,000 1,124,049,000                                  
      other revenues
                                                             1,390,000 792,000 1,130,000 11,601,000 29,985,000 22,874,000 21,178,000 12,750,000 14,678,000 10,853,000 10,782,000 8,449,000 14,905,000 8,925,000 9,162,000 8,737,000 11,905,000 15,597,000 11,153,000 9,363,000 7,999,000 7,167,000 9,782,000 11,224,000 14,458,000 16,369,000 20,259,000 10,135,000 9,912,000 12,585,000 20,217,000 18,929,000 21,793,000 22,736,000 26,187,000 
      regulated electricity fuel and purchased power
                                                             215,512,000 337,896,000                                  
      net of income tax expense of 6,216 and 5,859
                                                              9,512,000                                  
      regulated electricity segment
                                                               798,669,000 647,974,000 653,626,000 1,116,211,000 799,416,000 611,425,000 650,349,000 1,083,750,000 812,510,000 602,578,000 634,756,000 1,040,348,000 829,478,000 622,801,000 627,096,000 1,043,723,000 711,293,000 536,051,000 569,213,000 886,979,000 712,718,000 466,126,000 488,035,000 753,428,000 579,652,000 416,030,000 429,295,000 670,559,000 519,929,000 415,464,000 392,177,000 694,306,000 506,632,000 
      regulated electricity segment fuel and purchased power
                                                               244,049,000 212,007,000 225,571,000 353,904,000 251,800,000 215,540,000 257,990,000 381,543,000 291,699,000 247,388,000 267,198,000 419,979,000 327,561,000 269,378,000 259,991,000 407,242,000 270,337,000 203,353,000 225,160,000 314,150,000 263,944,000 157,395,000 152,609,000 203,519,000          
      net of income tax expense of 773 and 16,922
                                                               654,000                                 
      net of income tax benefit of 222 and 8,389
                                                                -349,000                                
      net of income tax benefit of 4,721 and
                                                                  7,211,000                              
      net of income tax benefit of 16,281 and
                                                                   24,982,000                             
      real estate segment
                                                                    9,416,000 22,819,000 48,474,000 16,763,000 18,366,000 27,480,000 18,965,000 36,880,000 47,742,000 42,055,000 47,411,000 48,352,000 77,250,000 81,470,000 97,871,000 112,603,000 107,854,000 105,081,000 78,755,000 84,753,000 72,056,000 165,827,000 75,072,000 67,300,000 51,593,000 188,718,000 75,009,000 57,189,000 
      real estate segment operations
                                                                    13,890,000 25,488,000 26,863,000 23,693,000 30,281,000 30,219,000 28,941,000 41,746,000 48,219,000 39,918,000 46,391,000 46,174,000 61,443,000 76,266,000 78,853,000 98,412,000 71,330,000     44,343,500 67,079,000 62,605,000 47,690,000 39,324,250 63,196,000  
      real estate impairment charge
                                                                    15,112,000 10,944,000 36,993,000 632,000 211,306,000                        
      other
                                                                                                
      capitalized interest
                                                                    -3,080,000 -2,177,000 -1,423,000 -3,311,000 -3,834,000 -4,227,000 -3,976,000 -4,938,000 -5,679,000 -7,608,000 -5,435,000 -5,213,000 -4,807,000 -6,394,000 -5,612,000 -4,959,000 -4,024,000 -1,884,000 -3,301,000 -3,544,000 -3,289,000 -2,774,000 -4,506,000 -4,120,000 -4,911,000 -5,383,000 -2,851,000  
      net of income tax benefit of 81 and 3,063
                                                                    -125,000                            
      marketing and trading
                                                                         -52,971,000 11,737,000 50,673,000 57,458,000 78,060,000 99,203,000 92,637,000 72,471,000                
      marketing and trading fuel and purchased power
                                                                         -60,698,000 9,503,000 45,245,000 51,522,000 67,899,000 93,860,000 74,533,000 57,944,000                
      net of income tax expense of 703 and 4,571
                                                                          1,083,000                      
      income from continuing operations — basic
                                                                         647.5 1,490 1,140 -50         520 860 890 260 562.5 1,140   505 1,200 600 
      net income — basic
                                                                         697.5 1,500 1,330 -40         405 1,050 280 270 572.5 1,150   525 1,210 620 
      income from continuing operations — diluted
                                                                         645 1,490 1,130 -50         520 860 880 260 562.5 1,140   505 1,200 600 
      net income — diluted
                                                                         695 1,500 1,330 -40         405 1,050 280 270 572.5 1,150   522.5 1,200 610 
      net of income tax benefit of 12,608 and
                                                                           19,429,000                     
      net of income tax expense of 120 and 46
                                                                            195,000                    
      weighted-average common shares
                                                                                                
      outstanding — basic
                                                                            100,521,000                    
      outstanding — diluted
                                                                            100,521,000                    
      net of income tax expense of 5,038 and 3
                                                                              7,710,000                  
      weighted-average common shares outstanding – basic
                                                                         100,691,000    100,256,000 100,324,000 100,229,000 100,045,000 99,417,000 99,491,000 99,221,000 99,115,000     91,397,000    91,265,000   
      weighted-average common shares outstanding – diluted
                                                                         100,965,000    100,835,000 100,829,000 100,779,000 100,622,000 100,010,000 99,973,000 99,640,000 99,449,000     91,532,000    91,405,000   
      income from continuing operations – basic
                                                                             30 2,000 780 160 100 1,850 1,120 120            
      net income – basic
                                                                             20 2,080 790 170 180 1,850 1,130 130            
      income from continuing operations – diluted
                                                                             30 1,990 780 160 100 1,840 1,110 120            
      net income – diluted
                                                                             30 2,070 780 160 170 1,840 1,130 130            
      income from continuing operations before
                                                                                                
      net of income tax expense of 310 and 855
                                                                               498,000                 
      earnings per weighted-average
                                                                                                
      common share outstanding
                                                                                                
      net of income tax expense of 479 and 557
                                                                                732,000                
      marketing and trading segment
                                                                                 64,838,000 84,425,000 89,925,000 85,002,000 84,098,000 107,031,000 71,172,000 116,866,000 129,684,000 128,563,000 115,240,000 88,383,000   167,475,000 
      marketing and trading segment fuel and purchased power
                                                                                 56,949,250 80,906,000 72,716,000 74,175,000 77,744,000 86,945,000          
      regulatory disallowance
                                                                                     -4,655,000 143,217,000          
      net of income tax expense of 3 and 12,407
                                                                                  -12,000              
      earnings per weighted – average
                                                                                                
      net of income tax benefit of 855 and
                                                                                   1,311,000             
      earnings per weighted – average common share outstanding
                                                                                                
      net of income tax benefit of 557 and
                                                                                    860,000            
      real estate operations segment
                                                                                     47,638,750 65,880,000 68,593,000 56,476,000       53,942,000 
      net of income tax expense of 12,407 and 890
                                                                                      19,043,000          
      earnings per weighted — average common share outstanding
                                                                                                
      regulated electricity segment purchased power and fuel
                                                                                       160,590,000 78,423,000 125,024,000 202,156,000 151,642,000 88,611,000 82,878,000 235,663,000 124,108,000 
      marketing and trading segment purchased power and fuel
                                                                                       57,593,000 100,641,000 112,886,000 107,377,000 94,120,000 67,764,000   147,698,000 
      loss from discontinued operations — net of income tax benefit of 37,710 and 798
                                                                                       -58,421,000         
      income from discontinued operations — net of income tax expense of 518 and 411
                                                                                        792,000        
      earnings per weighted — average common shares outstanding
                                                                                                
      - net of income tax expense of 1,174 and 899
                                                                                          1,514,000      
      - net of income tax expense of 204 and 817
                                                                                           313,000     
      income from continuing operations - basic
                                                                                           780 330    
      net income - basic
                                                                                           780 330    
      income from continuing operations - diluted
                                                                                           780 330    
      net income - diluted
                                                                                           780 330    
      income from discontinued operations - - net of income tax expense of 252 and 3,375
                                                                                            388,000    
      income from discontinued operations - - net of income tax expense of 332 and 133
                                                                                              510,000  
      income from discontinued operations — net of income tax expense of 817 and 4,304
                                                                                               1,253,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2013-12-31 2012-12-31 2011-12-31 2010-12-31 2009-12-31 2008-12-31 2007-12-31 2006-12-31 2005-12-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-09-30 
                                                                   
        assets
                                                                   
        current assets
                                                                   
        cash and cash equivalents
      6,409,000 6,604,000 30,885,000 18,841,000 10,047,000 3,838,000 49,171,000 4,007,000 9,634,000 4,955,000 15,108,000 7,658,000 6,951,000  7,032,000 29,189,000 13,968,000 9,969,000 25,688,000 14,146,000 17,202,000 59,968,000 181,926,000 6,763,000 63,139,000 10,283,000 29,852,000 1,648,000 6,109,000 5,766,000 64,991,000 3,839,000 15,440,000 13,892,000 10,674,000 4,953,000 3,028,000 8,881,000 48,267,000 43,040,000 14,484,000 39,488,000 13,007,000 13,557,000 11,664,000 7,604,000 10,471,000 9,526,000 26,202,000 33,583,000 110,188,000 145,378,000 105,245,000 56,321,000 87,210,000 154,003,000 163,366,000 373,064,000 271,816,000 19,194,000 201,746,000 
        customer and other receivables
      503,844,000 579,831,000 778,097,000 569,656,000 430,726,000 525,608,000 839,094,000 564,399,000 425,716,000 513,892,000 664,936,000 474,548,000 449,096,000  603,197,000 420,288,000 324,659,000 391,923,000 430,150,000 357,130,000 263,126,000 313,576,000 417,415,000 279,480,000 258,874,000 266,426,000 361,951,000 263,836,000 249,568,000 267,887,000 370,714,000 321,053,000 212,188,000 305,147,000 425,558,000 293,266,000 191,175,000 250,491,000 325,029,000 278,900,000 215,808,000 274,691,000 362,185,000 289,236,000 242,457,000 297,740,000 391,179,000 299,904,000 277,225,000 284,183,000 324,207,000 301,915,000 292,682,000 456,007,000 501,628,000 502,681,000 367,863,000 428,947,000 334,856,000 288,810,000  
        accrued unbilled revenues
      208,583,000 173,692,000 257,874,000 272,327,000 176,769,000 176,903,000 261,841,000 314,718,000 166,479,000 167,553,000 226,998,000 216,740,000 143,276,000  221,023,000 234,523,000 132,765,000 133,980,000 190,531,000 223,918,000 122,034,000 132,197,000 175,341,000 191,578,000 93,434,000 128,165,000 155,836,000 193,657,000 114,077,000 137,170,000 196,373,000 207,887,000 118,989,000 112,434,000 151,976,000 213,703,000 101,226,000 107,949,000 150,531,000 197,571,000 89,795,000 96,240,000 162,269,000 185,216,000 94,400,000 100,533,000 156,036,000 96,796,000 94,845,000 125,239,000 103,292,000           
        allowance for doubtful accounts
      -24,626,000 -25,495,000 -21,867,000 -17,449,000 -23,039,000 -24,849,000 -18,347,000 -15,826,000 -19,224,000 -22,433,000 -20,648,000 -19,806,000 -22,112,000  -23,999,000 -23,147,000 -24,666,000 -25,354,000 -25,303,000 -22,769,000 -20,405,000 -19,782,000 -18,069,000 -11,579,000 -8,366,000 -8,171,000 -7,282,000 -3,095,000 -2,455,000 -4,069,000 -5,215,000 -3,769,000 -2,046,000 -2,513,000 -3,051,000 -2,151,000 -1,946,000 -3,037,000 -3,608,000 -2,755,000 -2,427,000 -3,125,000 -3,721,000 -2,518,000 -2,560,000 -3,094,000 -3,462,000    -7,981,000 -6,153,000 -3,383,000 -4,782,000 -5,597,000 -4,979,000 -4,896,000 -5,059,000 -4,682,000 -4,738,000  
        materials and supplies
      543,198,000 546,329,000 519,178,000 509,269,000 488,009,000 469,022,000 473,847,000 484,000,000 438,943,000 444,344,000 443,852,000 442,735,000 425,457,000  386,703,000 371,655,000 358,287,000 349,135,000 351,148,000 340,672,000 314,702,000 314,745,000 322,017,000 318,368,000 323,545,000 331,091,000 293,899,000 289,928,000 280,857,000 269,065,000 268,184,000 263,370,000 257,815,000 264,012,000 257,455,000 258,134,000 252,598,000 253,979,000 250,789,000 241,612,000 234,179,000 234,234,000 234,987,000 231,101,000 221,276,000 218,889,000 230,220,000 221,682,000 218,096,000 204,387,000 181,414,000 176,020,000 173,252,000 149,759,000 125,802,000 109,736,000 101,333,000 98,943,000 95,728,000 96,413,000 93,443,000 
        income tax receivable
      8,416,000 5,979,000        332,000  4,240,000 11,699,000 14,494,000   6,972,000 7,514,000    6,792,000 4,325,000 17,122,000 20,599,000 21,727,000 14,063,000         4,073,000 9,531,000 3,751,000   4,637,000 589,000   3,317,000 3,098,000  135,517,000 2,423,000 6,466,000 2,483,000 26,005,000          
        fossil fuel
      19,955,000 18,824,000 19,515,000 17,670,000 16,203,000 32,420,000 54,193,000 65,045,000 50,230,000 49,203,000 49,977,000 50,057,000 39,571,000  53,087,000 29,827,000 20,772,000 18,032,000 29,893,000 25,074,000 24,396,000 19,552,000 17,060,000 17,257,000 16,930,000 14,829,000 18,527,000 25,453,000 26,294,000 25,029,000 40,398,000 47,591,000 48,062,000 25,258,000 27,013,000 29,890,000 30,656,000 28,608,000 34,745,000 36,768,000 44,227,000 45,697,000 43,536,000 43,196,000 44,705,000 37,097,000 32,836,000 38,028,000 31,334,000 22,000,000 21,575,000 39,245,000 29,752,000 27,792,000 21,973,000 23,658,000 20,512,000 22,892,000 25,978,000 24,385,000 29,524,000 
        assets from risk management activities
      388,000 3,250,000 6,636,000 10,903,000 77,550,000 10,578,000 641,000 760,000 78,000 6,808,000 11,376,000 12,105,000 16,095,000  164,794,000 137,028,000 206,102,000 63,481,000 126,595,000 82,309,000 22,611,000 2,931,000 13,875,000 710,000 2,108,000 515,000 817,000 459,000 763,000 1,113,000 1,224,000 3,316,000 1,994,000 1,931,000 358,000 307,000 4,222,000 19,694,000 6,235,000 16,676,000 16,089,000 15,905,000 13,654,000 14,722,000 13,658,000 13,785,000 11,863,000 17,169,000 25,699,000 30,264,000 73,788,000 50,619,000          
        deferred fuel and purchased power regulatory asset
      55,432,000 149,068,000 205,053,000 182,412,000 228,036,000 287,597,000 367,274,000 322,667,000 387,737,000 463,195,000 526,666,000 433,279,000 469,962,000  445,025,000 390,013,000 354,816,000 388,148,000 375,181,000 300,912,000 228,609,000 175,835,000 162,111,000 101,425,000 77,730,000 70,137,000 59,474,000 30,559,000 7,583,000 37,164,000 65,726,000 74,898,000 74,585,000 75,637,000 73,966,000 48,122,000 17,625,000 12,465,000 8,132,000       6,926,000 15,911,000 20,755,000 72,692,000 27,549,000   7,984,000 110,928,000 160,268,000 172,756,000      
        other regulatory assets
      141,297,000 136,941,000 130,572,000 121,436,000 94,034,000 133,372,000 150,093,000 169,266,000 191,132,000 162,562,000 103,653,000 128,600,000 130,840,000  94,676,000 119,163,000 131,444,000 130,376,000 122,719,000 119,890,000 111,271,000 115,878,000 110,759,000 150,169,000 147,741,000 133,070,000 138,033,000 153,900,000 127,642,000 129,738,000 143,849,000 154,661,000 178,490,000 172,451,000 184,351,000 172,606,000 138,316,000 94,410,000 114,088,000   149,555,000 139,766,000 134,578,000 147,869,000 129,808,000 94,004,000 76,388,000 71,257,000 69,072,000  781,714,000 787,506,000 514,353,000 686,016,000 151,123,000      
        other current assets
      151,984,000 108,686,000 74,712,000 102,843,000 90,995,000 74,915,000 86,759,000 139,563,000 131,257,000 101,417,000 108,314,000 101,581,000 77,551,000 288,000 65,019,000 89,609,000 69,474,000 83,896,000 82,546,000 81,901,000 86,238,000 76,627,000 67,926,000 75,796,000 82,573,000 61,958,000 67,985,000 72,222,000 65,951,000 56,128,000 60,946,000 45,865,000 51,887,000 48,039,000 45,905,000 45,301,000 48,565,000 45,028,000 43,284,000 42,979,000 40,480,000 37,242,000 38,439,000 44,827,000 45,135,000 38,817,000 40,673,000 39,895,000 37,102,000 26,904,000 28,362,000 27,465,000 21,847,000 34,738,000 68,924,000 75,869,000 47,654,000 40,935,000 45,938,000 73,432,000 98,963,000 
        total current assets
      1,614,880,000 1,703,709,000 2,000,655,000 1,787,908,000 1,589,330,000 1,689,404,000 2,264,566,000 2,048,599,000 1,781,982,000 1,926,967,000 2,161,938,000 1,851,737,000 1,748,386,000 146,843,000 2,016,557,000 1,798,148,000 1,594,593,000 1,551,100,000 1,709,148,000 1,523,183,000 1,169,784,000 1,198,319,000 1,454,686,000 1,147,089,000 1,078,307,000 1,030,030,000 1,133,155,000 1,028,567,000 876,389,000 924,991,000 1,207,190,000 1,118,711,000 957,404,000 1,016,288,000 1,174,205,000 1,068,204,000 794,996,000 822,219,000 977,492,000 963,387,000 826,025,000 890,516,000 1,061,979,000 1,031,756,000 935,442,000 973,435,000 1,040,932,000 1,043,609,000 1,005,726,000 956,470,000 931,930,000 928,737,000 882,482,000 947,447,000 1,474,662,000 1,891,392,000 1,137,130,000 1,258,767,000 1,062,220,000 738,364,000  
        investments and other assets
                                                                   
        nuclear decommissioning trusts
      1,392,817,000 1,414,166,000 1,393,446,000 1,337,858,000 1,286,101,000 1,282,845,000 1,300,012,000 1,245,593,000 1,239,024,000 1,201,246,000 1,120,463,000 1,162,397,000 1,125,617,000  1,025,913,000 1,076,088,000 1,227,465,000  1,225,485,000 1,223,088,000                                          
        other special use funds
      437,745,000 434,827,000 429,932,000 423,332,000 415,401,000 408,357,000 387,499,000 367,804,000 364,225,000 362,781,000 368,159,000 351,998,000 352,877,000  359,394,000 346,406,000 349,042,000 358,410,000 374,843,000 358,436,000 357,506,000 254,509,000 268,292,000 253,332,000 252,723,000 245,095,000 243,982,000 241,558,000 238,207,000 236,101,000 233,740,000 216,338,000 217,992,000                             
        other assets
      159,288,000 144,997,000 138,383,000 140,619,000 133,136,000 115,095,000 122,359,000 119,395,000 106,830,000 102,845,000 102,863,000 127,318,000 147,430,000 23,153,000 121,346,000 117,573,000 105,605,000 97,884,000 160,185,000 112,091,000 88,487,000 92,922,000 96,855,000 92,295,000 97,822,000 96,953,000 102,116,000 97,322,000 99,446,000 103,247,000 106,988,000 59,137,000 58,177,000 84,531,000 88,818,000 71,121,000 70,025,000 69,063,000 68,977,000 54,401,000 52,679,000 52,518,000 52,486,000 51,987,000 51,449,000 54,047,000 60,427,000 60,875,000 62,694,000 64,588,000 116,216,000 110,091,000 117,935,000 117,941,000 111,388,000 111,931,000 107,212,000 103,728,000 137,582,000 95,810,000 34,101,000 
        total investments and other assets
      1,990,316,000 1,999,127,000 1,977,361,000 1,936,012,000 1,866,013,000 1,812,277,000 1,809,870,000 1,732,792,000 1,710,079,000 1,666,872,000 1,594,656,000 1,654,746,000 1,643,006,000 7,130,463,000 1,593,517,000 1,651,914,000 1,773,633,000 1,797,959,000 1,760,513,000 1,693,615,000 1,605,692,000 1,485,866,000 1,434,984,000 1,369,660,000 1,270,971,000 1,352,823,000 1,313,771,000 1,289,328,000 1,256,962,000 1,190,482,000 1,247,415,000 1,149,118,000 1,137,608,000 955,582,000 932,490,000 893,420,000 875,073,000 848,650,000 848,730,000 827,281,000 813,245,000 799,820,000 779,805,000 794,082,000 797,235,000 785,533,000 768,091,000 726,697,000 669,210,000 627,643,000 625,134,000 673,511,000 909,958,000 1,119,801,000 1,148,378,000 1,394,407,000 981,651,000 969,899,000 949,410,000 862,846,000  
        property, plant and equipment
                                                                   
        plant in service and held for future use
      27,616,435,000 27,370,296,000 26,268,660,000 25,895,037,000 26,326,246,000 25,860,950,000 25,262,439,000 25,013,171,000 24,461,914,000 24,211,167,000 23,939,969,000 23,667,333,000 22,624,104,000  22,275,468,000 22,167,179,000 21,844,618,000 21,688,661,000 21,391,019,000 21,236,805,000 20,948,591,000 20,837,885,000 20,453,437,000 20,343,151,000 19,930,983,000 19,836,292,000 19,677,773,000 19,630,407,000 18,763,499,000 18,736,628,000 18,443,985,000 18,328,611,000 17,896,772,000 17,798,061,000 17,310,294,000 17,227,444,000 17,436,720,000 17,341,888,000 16,877,695,000 16,663,962,000 16,285,916,000 16,222,232,000 15,997,447,000 15,926,594,000 15,551,726,000 15,543,063,000 15,251,009,000 15,200,464,000 14,346,367,000 13,753,971,000 13,201,960,000 12,848,138,000 12,264,805,000 11,640,739,000 11,154,919,000 10,727,695,000 10,486,648,000 10,397,795,000 10,351,566,000 9,969,094,000 9,718,815,000 
        accumulated depreciation and amortization
      -9,146,511,000 -9,012,021,000 -8,952,278,000 -8,690,747,000 -9,327,761,000 -9,027,426,000 -8,877,815,000 -8,727,099,000 -8,594,795,000 -8,408,040,000 -8,319,351,000 -8,198,608,000 -8,072,595,000  -7,798,591,000 -7,667,678,000 -7,597,037,000 -7,504,603,000 -7,368,125,000 -7,278,877,000 -7,189,708,000 -7,110,310,000 -6,999,995,000 -6,905,049,000 -6,784,467,000 -6,637,857,000 -6,552,177,000 -6,470,935,000 -6,398,512,000 -6,366,014,000 -6,328,751,000 -6,245,809,000 -6,231,918,000 -6,128,535,000 -6,037,467,000 -5,951,653,000 -6,060,254,000 -5,970,100,000 -5,895,765,000 -5,733,857,000 -5,670,884,000 -5,594,094,000 -5,537,860,000 -5,497,350,000 -5,452,860,000 -5,397,751,000 -5,308,661,000    -4,514,204,000           
        net
      18,469,924,000 18,358,275,000 17,316,382,000 17,204,290,000 16,998,485,000 16,833,524,000 16,384,624,000 16,286,072,000 15,867,119,000 15,803,127,000 15,620,618,000 15,468,725,000 14,551,509,000  14,476,877,000 14,499,501,000 14,247,581,000 14,184,058,000 14,022,894,000 13,957,928,000 13,758,883,000 13,727,575,000 13,453,442,000 13,438,102,000 13,146,516,000 13,198,435,000 13,125,596,000 13,159,472,000 12,364,987,000 12,370,614,000 12,115,234,000 12,082,802,000 11,664,854,000 11,669,526,000 11,272,827,000 11,275,791,000 11,376,466,000 11,371,788,000 10,981,930,000 10,930,105,000 10,615,032,000 10,628,138,000 10,459,587,000 10,429,244,000 10,098,866,000 10,145,312,000 9,942,348,000 9,900,245,000 9,416,754,000 9,043,980,000 8,687,756,000 8,507,493,000 8,123,259,000 7,635,795,000 7,357,444,000       
        construction work in progress
      1,888,288,000 1,649,542,000 2,323,115,000 2,087,779,000 1,858,894,000 1,592,659,000 1,713,379,000 1,477,727,000 1,685,365,000 1,724,004,000 1,536,323,000 1,495,494,000 2,101,830,000  1,684,481,000 1,386,113,000 1,418,308,000 1,329,478,000 1,162,844,000 1,062,911,000 1,056,991,000 937,384,000 972,024,000 823,691,000 942,258,000 808,133,000 738,492,000 568,890,000 1,233,018,000 1,170,062,000 1,200,625,000 1,140,611,000 1,453,610,000 1,291,498,000 1,379,501,000 1,195,076,000 1,005,797,000 1,019,947,000 1,118,666,000 966,146,000 1,038,046,000 816,307,000 752,296,000 638,285,000 841,426,000 682,807,000 673,265,000 581,369,000 565,716,000 496,745,000 459,361,000 467,700,000 572,354,000 625,577,000 368,284,000 327,172,000 258,119,000 193,339,000 179,779,000 540,361,000 581,030,000 
        palo verde sale leaseback, net of accumulated depreciation
      31,641,000  32,416,000 80,622,000 81,589,000  83,524,000 84,491,000 85,459,000  87,394,000 88,361,000 89,329,000  91,264,000 92,231,000 93,199,000  95,133,000 96,101,000 97,068,000  99,003,000 99,971,000 100,938,000  102,873,000 103,841,000 104,808,000  106,743,000 107,710,000 108,678,000  110,613,000 111,580,000 112,548,000  114,483,000 115,450,000 116,418,000  118,352,000 119,320,000 120,287,000  122,222,000               
        intangible assets, net of accumulated amortization
      539,939,000  544,356,000 569,047,000 555,462,000  586,559,000 593,017,000 512,874,000  249,480,000 255,574,000 260,454,000  246,690,000 265,662,000 269,802,000  273,243,000 279,911,000 278,226,000  266,220,000 275,028,000 279,238,000  266,587,000 261,584,000 267,998,000  268,630,000 257,040,000 262,523,000  256,198,000 265,926,000 251,208,000  96,789,000 108,751,000 116,014,000  134,937,000 127,742,000 127,620,000  127,560,000           114,690,000 120,366,000 125,029,000 121,323,000 
        nuclear fuel, net of accumulated amortization
      116,743,000  115,097,000 120,267,000 112,207,000  112,135,000 125,407,000 113,825,000  112,956,000 100,019,000 112,735,000  115,227,000 132,696,000 119,296,000  119,487,000 109,110,000 124,533,000  128,876,000 152,219,000 168,457,000  141,903,000 159,633,000 142,610,000  134,812,000 119,256,000 135,400,000  135,460,000 118,909,000 135,821,000  133,731,000 120,408,000 138,424,000  137,519,000 156,608,000 136,557,000  138,179,000           57,936,000 52,347,000 57,959,000 15,139,000 
        total property, plant and equipment
      21,046,535,000 20,720,104,000 20,331,366,000 20,062,005,000 19,606,637,000 19,197,899,000 18,880,221,000 18,566,714,000 18,264,642,000 17,980,157,000 17,606,771,000 17,408,173,000 17,115,857,000  16,614,539,000 16,376,203,000 16,148,186,000 15,987,434,000 15,673,601,000 15,505,961,000 15,315,701,000 15,159,210,000 14,919,565,000 14,789,011,000 14,637,407,000 14,522,538,000 14,375,451,000 14,253,420,000 14,113,421,000 14,029,570,000 13,826,044,000 13,802,783,000 13,625,065,000 13,445,266,000 13,154,599,000 12,967,282,000 12,881,840,000 12,714,276,000 12,445,599,000 12,240,860,000 12,023,934,000 11,808,944,000 11,602,691,000 11,471,199,000 11,324,756,000 11,194,330,000 11,003,574,000 10,888,985,000 10,396,393,000 9,962,258,000 9,578,819,000 9,257,816,000 8,916,658,000 8,436,389,000 7,881,928,000       
        deferred debits
                                                                   
        regulatory assets
      1,454,210,000 1,463,357,000 1,471,310,000 1,357,382,000 1,372,760,000 1,389,489,000 1,345,777,000 1,358,978,000 1,371,260,000 1,390,279,000 1,303,244,000 1,280,344,000 1,258,663,000  1,173,415,000 1,180,656,000 1,184,246,000 1,192,987,000 1,177,698,000 1,173,977,000 1,135,857,000 1,133,987,000 1,305,437,000 1,315,846,000 1,302,448,000 1,304,073,000 1,329,446,000 1,321,431,000 1,321,507,000 1,342,941,000 1,221,293,000 1,233,062,000 1,200,260,000 1,202,302,000 1,381,179,000 1,415,091,000 1,321,473,000 1,313,428,000 1,212,150,000 108,596,000 168,753,000 1,214,146,000 1,102,327,000 1,081,113,000 1,067,830,000 1,054,087,000 836,618,000 711,712,000 1,099,900,000 1,352,079,000 1,048,656,000       169,368,000 167,493,000 161,543,000 186,479,000 
        operating lease right-of-use assets
      4,060,364,000 3,649,669,000 3,652,128,000 3,638,906,000 2,373,880,000 1,605,463,000 1,599,800,000 1,599,331,000 1,325,138,000 1,309,975,000 1,307,643,000 1,337,355,000 1,361,847,000  806,509,000 871,480,000 896,907,000 890,057,000 649,381,000 718,948,000 502,959,000 505,064,000 502,898,000 555,783,000 144,380,000 145,813,000 156,050,000 176,219,000 193,897,000                                 
        assets for other postretirement benefits
      411,088,000 399,334,000                     105,675,000 99,801,000 96,243,000 90,570,000 31,717,000 56,336,000 52,674,000 46,906,000 29,094,000 47,619,000 89,378,000 268,978,000 193,747,000 184,629,000 175,414,000 166,206,000 191,007,000 186,505,000 190,458,000 185,997,000 172,983,000 168,755,000 156,192,000 152,290,000 180,527,000               
        other
      113,234,000 96,299,000 83,747,000 88,739,000 73,948,000 66,126,000 57,774,000 55,645,000 59,847,000 63,465,000 53,109,000 50,372,000 47,205,000 17,299,000 44,550,000 45,680,000 40,370,000 37,962,000 36,368,000 38,073,000 36,238,000 34,983,000 28,176,000 30,198,000 32,004,000 33,400,000 37,976,000 40,365,000 39,257,000 129,312,000 140,919,000 140,880,000 138,591,000 130,666,000 141,647,000 141,101,000 144,029,000 139,474,000 130,748,000 129,910,000 127,965,000 128,835,000 155,233,000 154,578,000 154,248,000 153,857,000 150,606,000 137,683,000 137,997,000 143,935,000 113,061,000 200,015,000 567,389,000 444,904,000 387,812,000 363,749,000 308,819,000 320,443,000 271,629,000 260,204,000 278,542,000 
        total deferred debits
      6,038,896,000 5,608,659,000 5,583,523,000 5,449,256,000 4,174,498,000 3,403,180,000 3,354,897,000 3,353,025,000 3,091,010,000 3,087,157,000 3,071,061,000 3,064,686,000 3,073,124,000  2,619,985,000 2,675,215,000 2,684,542,000 2,666,729,000 2,393,162,000 2,338,819,000 2,093,481,000 2,177,026,000 1,942,186,000 2,001,628,000 1,575,075,000 1,573,856,000 1,555,189,000 1,594,351,000 1,607,335,000 1,519,159,000 1,391,306,000 1,421,561,000 1,428,229,000 1,601,946,000 1,716,573,000 1,740,821,000 1,640,916,000 1,619,108,000 1,533,905,000 1,507,037,000 1,521,897,000 1,528,978,000 1,430,543,000 1,404,446,000 1,378,270,000 1,360,234,000 1,167,751,000 849,395,000 1,308,286,000 1,564,647,000 1,226,820,000 948,091,000 910,995,000 740,075,000 950,975,000 459,763,000 242,479,000 279,123,000 278,072,000 277,206,000  
        total assets
      30,690,627,000 30,031,599,000 29,892,905,000 29,235,181,000 27,236,478,000 26,102,760,000 26,309,554,000 25,701,130,000 24,847,713,000 24,661,153,000 24,434,426,000 23,979,342,000 23,580,373,000 7,277,306,000 22,844,598,000 22,501,480,000 22,200,954,000 22,003,222,000 21,536,424,000 21,061,578,000 20,184,658,000 20,020,421,000 19,751,421,000 19,307,388,000 18,561,760,000 18,479,247,000 18,377,566,000 18,165,666,000 17,854,107,000 17,664,202,000 17,671,955,000 17,492,173,000 17,148,306,000 17,019,082,000 16,977,867,000 16,669,727,000 16,192,825,000 16,004,253,000 15,805,726,000 15,538,565,000 15,185,101,000 15,028,258,000 14,875,018,000 14,701,483,000 14,435,703,000 14,313,532,000 13,980,348,000 13,508,686,000 13,379,615,000 13,111,018,000 12,362,703,000 11,808,155,000 11,620,093,000 11,243,712,000 11,455,943,000 11,322,645,000 9,896,747,000 9,967,579,000 9,741,978,000 9,375,392,000 9,112,866,000 
        liabilities and equity
                                                                   
        current liabilities
                                                                   
        accounts payable
      601,648,000 680,203,000 536,924,000 668,664,000 599,239,000 485,426,000 429,478,000 548,840,000 476,629,000 442,455,000 404,971,000 436,808,000 361,410,000 6,499,000 475,362,000 436,308,000 343,255,000 393,083,000 353,591,000 377,157,000 309,145,000 318,585,000 288,265,000 316,230,000 301,325,000 346,448,000 276,117,000 327,969,000 263,656,000 277,336,000 249,059,000 260,285,000 205,169,000 256,442,000 236,746,000 270,262,000 250,197,000 264,631,000 248,133,000 316,589,000 234,946,000 297,480,000 233,970,000 326,119,000 271,489,000 295,211,000 278,835,000 284,516,000 221,312,000 326,987,000 236,354,000 240,637,000 261,029,000 323,346,000 346,047,000 377,107,000 373,526,000 315,319,000 278,006,000 237,522,000 322,417,000 
        accrued taxes
      240,006,000 186,605,000 348,376,000 205,460,000 232,383,000 175,863,000 341,640,000 201,214,000 224,851,000 166,833,000 265,463,000 163,797,000 214,484,000 7,694,000 285,689,000 181,927,000 222,492,000 168,645,000 253,504,000 183,037,000 213,536,000 159,551,000 221,358,000 151,487,000 194,732,000 144,899,000 220,930,000 158,921,000 199,949,000 154,819,000 226,846,000 156,362,000 194,930,000 148,946,000 228,791,000 150,709,000 182,812,000 138,964,000 219,432,000 145,167,000 181,889,000 138,600,000 250,679,000 155,812,000 188,724,000 140,613,000 249,932,000 130,998,000 124,939,000 120,289,000 104,711,000 104,011,000 109,798,000 269,628,000 263,935,000 289,235,000 245,611,000 171,409,000 88,707,000 103,660,000 229,696,000 
        accrued interest
      100,454,000 105,637,000 99,233,000 84,760,000 82,819,000 81,799,000 83,910,000 76,652,000 74,001,000 72,916,000 76,192,000 58,559,000 72,146,000  61,892,000 57,349,000 61,648,000 57,332,000 60,046,000 56,864,000 58,709,000 56,962,000 60,642,000 53,503,000 53,608,000 53,534,000 50,993,000 50,581,000 50,074,000 61,107,000 53,021,000 56,248,000 51,335,000 56,397,000 49,218,000 53,046,000 48,576,000 52,835,000 46,124,000 57,927,000 44,489,000 56,305,000 40,045,000 54,547,000 42,096,000 52,603,000 41,289,000 48,351,000 49,380,000 54,872,000 54,831,000 54,596,000 40,741,000 39,836,000 48,746,000 31,774,000 38,795,000 49,647,000 38,383,000 47,077,000 50,673,000 
        common dividends payable
       110,022,000  106,869,000  106,592,000  99,936,000  99,813,000  98,014,000  97,895,000  96,081,000  95,988,000  93,610,000  93,531,000  88,066,000  87,982,000  82,824,000  82,675,000  77,821,000  77,667,000  73,113,000  72,926,000  69,484,000  69,363,000  65,933,000  65,790,000  62,528,000 59,789,000             
        short-term borrowings
      594,100,000 757,005,000 675,700,000 1,405,000,000 870,197,000 568,450,000 623,500,000 531,450,000 793,500,000 609,500,000 424,000,000 305,350,000 497,550,000 15,720,000 466,820,000 541,000,000 262,950,000 292,000,000 125,000,000 504,700,000 214,750,000 169,000,000 57,925,000 291,900,000 563,000,000 114,675,000 57,375,000 432,373,000 244,050,000 76,400,000 128,200,000 616,249,000 369,900,000 95,400,000 131,400,000 482,000,000 207,297,000 177,200,000 117,300,000 64,140,000 261,800,000  57,000,000 157,500,000 44,500,000 147,400,000 19,150,000 153,125,000 92,175,000  16,600,000 153,715,000 670,469,000 340,661,000 35,750,000 15,673,000 71,030,000 94,204,000 127,802,000 235,086,000 90,011,000 
        current maturities of long-term debt
      600,000,000 600,000,000 600,000,000 350,000,000 800,000,000 800,000,000 1,000,000,000 1,000,000,000 875,000,000 875,000,000 250,000,000 318,907,000 60,821,000  27,628,000   150,000,000 150,000,000 150,000,000     650,000,000 800,000,000 450,000,000 250,000,000 250,000,000 500,000,000 600,000,000 600,000,000 582,000,000 82,000,000 207,000,000 207,000,000 125,000,000 125,000,000 16,870,000 293,580,000 357,580,000 357,580,000 411,433,000 102,723,000 383,570,000 383,570,000 368,841,000 540,424,000 122,828,000 477,435,000 631,879,000 277,693,000 177,646,000 163,773,000 1,596,000 384,947,000 617,165,000 566,991,000 268,211,000 441,079,000 448,980,000 
        customer deposits
      78,234,000 63,776,000 61,716,000 53,272,000 45,600,000 44,345,000 41,976,000 41,558,000 42,059,000 42,037,000 40,557,000 41,585,000 41,186,000  41,731,000 41,459,000 41,628,000 42,293,000 44,089,000 44,419,000 45,170,000 48,340,000 47,730,000 49,132,000 54,965,000 64,908,000 78,173,000 84,177,000 87,263,000 91,174,000 89,916,000 89,681,000 75,759,000 70,388,000 69,690,000 72,585,000 76,149,000 82,520,000 78,262,000 79,136,000 78,825,000 73,073,000 72,455,000 72,785,000 72,561,000 72,307,000 73,468,000 76,101,000 79,689,000 72,176,000 68,322,000 71,026,000 78,745,000 80,010,000 70,168,000 60,509,000 55,558,000 54,696,000 52,850,000 50,473,000 50,338,000 
        liabilities from risk management activities
      55,918,000 35,141,000 39,078,000 25,692,000 18,208,000 52,340,000 79,617,000 104,309,000 113,530,000 80,913,000 42,732,000 73,833,000 83,874,000  7,240,000 5,596,000 1,706,000 4,373,000 1,652,000 1,512,000 3,067,000 7,557,000 4,266,000 44,805,000 54,784,000 38,946,000 44,349,000 58,834,000 33,289,000 35,506,000 45,504,000 49,096,000 67,743,000 59,252,000 50,469,000 48,613,000 41,932,000 25,836,000 45,175,000 55,338,000 93,283,000 77,716,000 74,637,000 60,673,000 62,303,000 59,676,000 27,622,000 31,892,000 73,741,000 53,968,000 58,976,000 55,908,000          
        liabilities for asset retirements
      57,428,000 71,698,000 59,800,000 41,226,000 47,344,000 50,009,000 52,185,000 37,306,000 33,048,000 28,550,000 16,445,000 15,617,000 20,321,000  6,307,000 5,111,000 4,069,000 4,473,000 6,066,000 15,646,000 16,021,000 15,586,000 12,226,000 10,735,000 10,095,000 11,025,000 12,850,000 21,950,000 22,823,000 19,842,000 13,000,000 9,184,000 6,397,000 4,745,000 1,559,000 8,960,000 8,627,000 9,135,000 11,852,000 15,513,000 17,217,000 28,573,000 26,875,000 28,543,000 28,918,000  39,416,000               
        operating lease liabilities
      136,417,000 188,586,000 203,740,000 191,628,000 122,929,000 100,367,000 119,080,000 107,232,000 69,102,000 67,883,000 90,578,000 90,658,000 65,130,000 117,000 128,618,000 125,320,000 100,949,000 100,443,000 130,078,000 128,673,000 74,328,000 74,785,000 89,064,000 83,851,000 12,360,000 12,713,000 26,221,000 60,596,000 65,435,000                                 
        regulatory liabilities
      117,241,000 210,909,000 194,094,000 182,458,000 225,332,000 206,955,000 243,714,000 230,551,000 221,552,000 209,923,000 226,989,000 219,075,000 202,266,000  420,357,000 404,107,000 448,778,000 296,271,000 379,193,000 327,612,000 250,228,000 229,088,000 308,019,000 279,479,000 279,105,000 234,912,000 208,022,000 231,857,000 260,404,000 165,876,000 159,788,000 156,757,000 136,535,000 100,086,000 120,671,000 91,173,000 101,208,000 948,916,000 998,349,000 1,010,821,000 1,009,418,000 994,152,000 995,757,000 1,016,991,000 1,070,106,000 130,549,000 154,027,000 99,273,000 88,116,000 737,332,000   587,586,000 642,564,000 635,431,000 592,494,000 506,646,000 528,838,000 523,880,000 512,190,000 90,078,000 
        other current liabilities
      114,274,000 151,444,000 146,818,000 112,213,000 123,955,000 171,651,000 182,246,000 132,976,000 132,597,000 193,524,000 130,415,000 110,378,000 105,141,000 14,637,000 139,260,000 128,190,000 109,255,000 151,968,000 146,038,000 140,038,000 145,589,000 187,448,000 155,289,000 127,175,000 121,514,000 168,323,000 161,716,000 140,879,000 114,361,000 184,229,000 169,454,000 167,202,000 184,623,000 246,529,000 207,599,000 181,133,000 152,015,000 244,000,000 222,257,000 265,498,000 180,319,000 197,861,000 208,076,000 162,742,000 150,432,000 178,962,000 195,938,000 158,540,000 171,573,000 148,616,000 139,063,000 125,574,000 97,915,000 102,685,000 134,123,000 297,425,000 101,748,000 91,021,000 100,875,000 101,632,000 56,972,000 
        total current liabilities
      2,695,720,000 3,161,026,000 2,965,479,000 3,427,242,000 3,168,006,000 2,843,797,000 3,197,346,000 3,112,024,000 3,055,869,000 2,889,347,000 1,968,342,000 1,932,581,000 1,724,329,000 142,562,000 2,060,904,000 2,022,448,000 1,596,730,000 1,756,869,000 1,649,257,000 2,023,268,000 1,330,543,000 1,360,433,000 1,244,784,000 1,496,363,000 2,295,488,000 2,078,365,000 1,586,746,000 1,900,961,000 1,591,304,000 1,648,964,000 1,734,788,000 2,238,885,000 1,874,391,000 1,197,852,000 1,303,143,000 1,638,594,000 1,193,813,000 1,292,946,000 1,109,718,000 1,478,544,000 1,585,902,000 1,442,317,000 1,523,362,000 1,339,859,000 1,373,976,000 1,559,143,000 1,448,518,000 1,618,644,000 1,083,542,000 1,342,705,000 1,310,736,000 1,083,160,000 1,505,928,000 1,384,967,000 1,458,560,000 2,272,073,000 1,625,896,000 1,487,244,000 1,087,306,000 1,325,761,000  
        long-term debt less current maturities
      9,801,675,000 9,205,676,000 9,204,259,000 8,507,002,000 8,060,736,000 8,058,648,000 8,056,318,000 8,056,225,000 7,541,871,000 7,540,622,000 8,164,372,000 8,164,315,000 7,916,554,000 947,892,000 7,344,205,000 7,241,295,000 7,226,624,000 6,913,735,000 6,763,146,000 6,315,927,000 6,465,045,000 6,314,266,000 6,316,420,000 5,922,161,000 4,833,324,000 4,832,558,000 4,984,996,000 4,886,879,000 4,886,108,000 4,638,232,000 4,487,364,000 4,191,525,000 4,290,533,000 4,789,713,000 4,491,048,000 4,192,520,000 4,273,890,000 4,021,785,000 4,145,366,000 3,897,835,000 3,463,032,000 3,462,391,000 3,257,347,000 3,565,857,000 3,281,319,000 3,031,215,000 3,037,801,000 2,796,465,000 3,160,219,000 2,953,507,000 2,948,991,000 3,370,524,000 3,031,603,000 3,127,125,000 3,232,633,000 2,608,455,000 2,584,985,000 2,632,062,000 2,933,736,000 2,462,838,000 2,840,900,000 
        deferred credits and other
                                                                   
        deferred income taxes
      2,479,565,000 2,470,932,000 2,491,779,000 2,465,821,000 2,445,213,000 2,444,473,000 2,453,968,000 2,440,175,000 2,396,743,000 2,416,480,000 2,408,218,000 2,357,517,000 2,379,720,000 1,521,000 2,418,914,000 2,357,469,000 2,318,959,000 2,311,862,000 2,289,366,000 2,192,169,000 2,134,471,000 2,135,403,000 2,163,050,000 2,070,453,000 2,016,770,000 1,992,339,000 1,975,989,000 1,838,145,000 1,811,689,000 1,807,421,000 1,813,472,000 1,727,700,000 1,689,601,000 1,690,805,000 3,182,400,000 3,048,007,000 2,955,441,000 2,945,232,000 2,941,559,000 2,794,741,000 2,726,220,000  57,857,000 77,841,000 113,521,000 122,232,000 61,201,000 91,152,000 152,191,000 130,571,000 94,602,000 53,990,000 79,729,000 31,510,000 982,000 94,710,000 9,057,000 631,000 631,000 631,000 4,094,000 
        liabilities for pension benefits
      170,295,000 167,636,000 150,086,000 147,929,000 140,437,000 139,317,000 107,355,000 109,464,000 110,597,000 112,702,000 110,472,000 112,537,000 114,290,000  148,403,000 150,837,000 149,856,000 152,865,000 160,972,000 163,207,000 164,230,000 166,484,000 177,855,000 284,585,000 273,284,000 280,185,000 297,843,000 356,928,000 384,492,000 443,170,000 316,423,000 319,604,000 284,007,000 327,300,000 409,871,000 460,368,000 469,746,000 509,310,000 401,680,000 440,919,000 441,605,000 480,998,000 383,801,000 425,002,000 412,552,000                 
        customer advances
      618,106,000 632,169,000 661,274,000 580,656,000 569,290,000 569,343,000 601,910,000 514,066,000 533,180,000 533,580,000 520,180,000 536,579,000 532,596,000  362,140,000 336,198,000 314,664,000 257,151,000 247,334,000 247,531,000 220,999,000 221,032,000 224,924,000 213,572,000 212,545,000 215,330,000 192,374,000 174,411,000 155,894,000 137,153,000 125,267,000 118,459,000 109,629,000 113,996,000 101,210,000 98,795,000 92,113,000 88,672,000 98,779,000 101,568,000 110,056,000 115,609,000 121,905,000 120,063,000 122,259,000 123,052,000 123,136,000 114,480,000 109,359,000 116,805,000 121,645,000 136,595,000          
        coal mine reclamation
      161,686,000 159,587,000 157,593,000 155,600,000 153,606,000 171,483,000 187,673,000 186,451,000 185,229,000 184,007,000 182,816,000 181,636,000 180,446,000  178,095,000 176,936,000 175,776,000 174,616,000 173,486,000 172,357,000 171,227,000 170,097,000 168,997,000 167,896,000 166,796,000 165,695,000 165,695,000 197,443,000 214,037,000 212,785,000 210,030,000 213,137,000 231,512,000 231,597,000 238,634,000 236,811,000 224,516,000 221,910,000 220,269,000 203,623,000 202,069,000 201,984,000 201,040,000 200,155,000 199,218,000 198,292,000 209,695,000 207,453,000 118,860,000 117,896,000 117,243,000 92,060,000          
        deferred investment tax credit
      307,171,000 308,261,000 239,470,000 246,189,000 249,525,000 249,490,000 247,456,000 253,661,000 257,448,000 257,743,000 253,680,000 223,278,000 184,427,000  179,418,000 184,032,000 186,251,000 186,570,000 183,038,000 187,720,000 190,842,000 191,372,000 187,926,000 193,081,000 196,002,000 196,468,000 193,118,000 197,749,000 200,052,000 200,405,000 198,178,000 202,797,000 205,428,000 205,575,000 205,870,000 206,969,000 209,818,000 210,162,000 180,738,000 184,998,000 186,966,000 187,080,000 188,149,000 176,389,000 178,313,000 178,607,000 177,567,000 152,361,000              
        unrecognized tax benefits
      106,924,000 105,484,000 87,245,000 45,815,000 45,013,000 44,233,000 44,564,000 35,138,000 34,511,000 33,861,000 33,738,000 39,073,000 38,863,000  4,717,000 4,896,000 4,758,000 4,657,000 5,683,000 6,002,000 5,870,000 5,834,000 6,013,000 6,613,000 6,400,000 6,189,000 6,341,000 26,271,000 26,042,000 22,517,000 11,896,000 13,416,000 13,229,000 13,115,000 12,943,000 10,307,000 10,172,000 10,046,000 9,904,000 9,772,000 9,631,000 9,524,000 36,634,000 14,311,000 14,196,000 19,377,000 14,601,000 42,209,000 71,135,000 72,270,000 66,349,000 142,099,000          
        total deferred credits and other
      11,082,264,000 10,577,822,000 10,512,074,000 10,472,997,000 9,161,754,000 8,342,837,000 8,329,820,000 8,216,559,000 7,939,440,000 7,946,322,000 7,813,507,000 7,806,309,000 7,775,039,000 26,976,000 7,077,376,000 7,216,214,000 7,327,464,000 7,311,158,000 6,937,557,000 6,887,484,000 6,582,390,000 6,592,929,000 6,223,042,000 6,278,387,000 5,836,116,000 6,015,136,000 6,124,119,000 6,020,583,000 5,994,970,000 6,028,301,000 5,963,942,000 5,902,329,000 5,829,711,000 5,895,787,000 5,906,069,000 5,848,536,000 5,759,182,000 5,753,610,000 5,558,507,000 5,443,003,000 5,395,754,000 5,404,093,000 5,302,990,000 5,270,124,000 5,227,401,000 5,204,072,000 4,850,016,000 4,753,117,000 4,994,696,000 4,818,673,000 4,230,947,000 4,008,791,000 3,636,583,000 3,200,009,000 3,318,634,000 3,017,153,000 2,735,670,000 2,871,520,000 2,826,376,000 2,736,397,000  
        commitments and contingencies
                                                                   
        equity
                                                                   
        common stock
      3,219,691,000 3,231,372,000 3,147,069,000 3,119,404,000 3,109,612,000 3,121,617,000 2,774,505,000 2,764,511,000 2,757,506,000 2,752,676,000 2,744,501,000 2,736,112,000 2,730,851,000 2,719,735,000 2,720,364,000 2,712,297,000 2,706,325,000 2,702,743,000 2,698,552,000 2,692,015,000 2,687,052,000 2,677,482,000 2,670,358,000 2,665,518,000 2,664,387,000 2,659,561,000 2,654,430,000 2,648,234,000 2,644,063,000 2,634,265,000 2,629,627,000 2,624,672,000 2,620,261,000 2,614,805,000 2,608,825,000 2,604,482,000 2,595,042,000 2,596,030,000 2,552,979,000 2,549,498,000 2,547,065,000 2,541,668,000 2,529,019,000 2,526,945,000 2,523,247,000 2,512,970,000 2,502,217,000 2,491,558,000 2,466,923,000 2,444,247,000 2,421,372,000 2,153,295,000 2,151,323,000 2,135,787,000 2,114,550,000 2,067,377,000 1,769,047,000 1,753,825,000 1,748,580,000 1,746,189,000  
        treasury stock
      -3,323,000 -3,323,000 -3,323,000 -3,323,000 -3,323,000 -3,323,000 -7,191,000 -7,191,000 -9,073,000 -8,185,000 -5,328,000 -5,328,000 -7,451,000  -2,603,000 -2,976,000 -3,648,000 -6,401,000 -3,079,000 -3,079,000 -3,776,000 -6,289,000 -2,966,000 -3,190,000 -7,000,000 -9,427,000 -5,117,000 -5,140,000 -5,586,000 -4,825,000 -1,409,000 -1,431,000 -2,431,000 -5,624,000 -833,000 -1,553,000 -2,270,000 -4,133,000 -130,000 -130,000 -542,000 -5,806,000 -1,765,000 -1,765,000 -2,266,000 -3,401,000 -106,000    -2,239,000 -3,812,000 -2,854,000 -2,054,000 -449,000 -1,245,000 -428,000 -490,000 -2,625,000 -2,356,000  
        total common stock
      3,216,368,000 3,228,049,000 3,143,746,000 3,116,081,000 3,106,289,000 3,118,294,000 2,767,314,000 2,757,320,000 2,748,433,000 2,744,491,000 2,739,173,000 2,730,784,000 2,723,400,000  2,717,761,000 2,709,321,000 2,702,677,000 2,696,342,000 2,695,473,000 2,688,936,000 2,683,276,000 2,671,193,000 2,667,392,000 2,662,328,000 2,657,387,000 2,650,134,000 2,649,313,000 2,643,094,000 2,638,477,000 2,629,440,000 2,628,218,000 2,623,241,000 2,617,830,000 2,609,181,000 2,607,992,000 2,602,929,000 2,592,772,000 2,591,897,000 2,552,849,000 2,549,368,000 2,546,523,000 2,535,862,000 2,527,254,000 2,525,180,000 2,520,981,000 2,509,569,000 2,502,111,000 2,487,250,000 2,462,712,000 2,439,530,000 2,419,133,000 2,149,483,000 2,148,469,000 2,133,733,000 2,114,101,000 2,066,132,000 1,768,619,000 1,753,335,000 1,745,955,000 1,743,833,000 1,739,274,000 
        retained earnings
      3,883,738,000 3,850,817,000 4,054,355,000 3,641,148,000 3,662,313,000 3,666,959,000 3,882,081,000 3,487,113,000 3,483,178,000 3,466,317,000 3,665,946,000 3,267,731,000 3,357,052,000 3,360,347,000 3,580,102,000 3,253,772,000 3,281,601,000 3,264,719,000 3,429,076,000 3,089,266,000 3,060,752,000 3,025,106,000 3,231,485,000 2,885,109,000 2,867,610,000 2,837,610,000 2,949,891,000 2,637,620,000 2,659,086,000 2,641,183,000 2,780,428,000 2,465,402,000 2,454,268,000 2,442,511,000 2,576,193,000 2,300,109,000 2,278,867,000 2,255,547,000 2,342,643,000 2,079,619,000 2,097,246,000 2,092,803,000 2,190,387,000 1,933,256,000 1,942,194,000 1,926,065,000 2,052,207,000 1,785,273,000 1,624,102,000 1,534,483,000 1,423,961,000 1,298,213,000 1,444,208,000 1,413,741,000 1,319,747,000 1,193,712,000 1,204,122,000 1,213,880,000 1,147,034,000 1,116,776,000 1,119,678,000 
        accumulated other comprehensive loss
      -31,949,000 -32,408,000 -30,091,000 -30,441,000 -30,094,000 -30,942,000 -32,814,000 -33,294,000 -32,582,000 -33,144,000 -30,434,000 -31,591,000 -31,536,000 -31,435,000 -53,300,000 -54,814,000 -53,708,000 -54,861,000 -59,666,000 -60,578,000 -61,512,000 -62,796,000 -57,491,000 -57,875,000 -55,579,000 -57,096,000 -46,538,000 -47,636,000 -46,501,000 -47,708,000 -55,074,000 -56,624,000 -52,341,000 -45,002,000                            
        total shareholders’ equity
      7,068,157,000 7,046,458,000 7,168,010,000 6,726,788,000 6,738,508,000 6,754,311,000 6,616,581,000 6,211,139,000 6,199,029,000 6,177,664,000 6,374,685,000 5,966,924,000 6,048,916,000  6,244,563,000 5,908,279,000 5,930,570,000 5,906,200,000 6,064,883,000 5,717,624,000 5,682,516,000 5,633,503,000 5,841,386,000 5,489,562,000 5,469,418,000 5,430,648,000 5,552,666,000 5,233,078,000 5,251,062,000 5,222,915,000 5,353,572,000 5,032,019,000 5,019,757,000 5,006,690,000 5,142,068,000 4,859,412,000 4,828,776,000 4,803,622,000 4,853,346,000 4,585,268,000 4,599,999,000 4,583,917,000 4,653,651,000 4,392,836,000 4,396,793,000 4,367,493,000 4,491,916,000 4,194,470,000 3,972,806,000 3,821,850,000 3,683,327,000           
        noncontrolling interests
      42,811,000 40,617,000 43,083,000 101,152,000 107,474,000 103,167,000 109,489,000 105,183,000 111,504,000 107,198,000 113,520,000 109,213,000 115,535,000 111,229,000 117,550,000 113,244,000 119,566,000 115,260,000 121,581,000 117,275,000 124,164,000 119,290,000 125,789,000 120,915,000 127,414,000 122,540,000 129,039,000 124,165,000 130,663,000 125,790,000 132,289,000 127,415,000 133,914,000 129,040,000 135,539,000 130,665,000 137,164,000 132,290,000 138,789,000 133,915,000 140,414,000 135,540,000 137,668,000 132,807,000 156,214,000 151,609,000 152,097,000 145,990,000 129,483,000 108,736,000 91,899,000           
        total equity
      7,110,968,000 7,087,075,000 7,211,093,000 6,827,940,000 6,845,982,000 6,857,478,000 6,726,070,000 6,316,322,000 6,310,533,000 6,284,862,000 6,488,205,000 6,076,137,000 6,164,451,000 6,159,876,000 6,362,113,000 6,021,523,000 6,050,136,000 6,021,460,000 6,186,464,000 5,834,899,000 5,806,680,000 5,752,793,000 5,967,175,000 5,610,477,000 5,596,832,000 5,553,188,000 5,681,705,000 5,357,243,000 5,381,725,000 5,348,705,000 5,485,861,000 5,159,434,000 5,153,671,000 5,135,730,000 5,277,607,000 4,990,077,000 4,965,940,000 4,935,912,000 4,992,135,000 4,719,183,000 4,740,413,000 4,719,457,000 4,791,319,000 4,525,643,000 4,553,007,000 4,519,102,000 4,644,013,000 4,340,460,000 4,102,289,000 3,930,586,000 3,775,226,000 3,345,680,000          
        total liabilities and equity
      30,690,627,000 30,031,599,000 29,892,905,000 29,235,181,000 27,236,478,000 26,102,760,000 26,309,554,000 25,701,130,000 24,847,713,000 24,661,153,000 24,434,426,000 23,979,342,000 23,580,373,000 7,277,306,000 22,844,598,000 22,501,480,000 22,200,954,000 22,003,222,000 21,536,424,000 21,061,578,000 20,184,658,000 20,020,421,000 19,751,421,000 19,307,388,000 18,561,760,000 18,479,247,000 18,377,566,000 18,165,666,000 17,854,107,000 17,664,202,000 17,671,955,000 17,492,173,000 17,148,306,000 17,019,082,000 16,977,867,000 16,669,727,000 16,192,825,000 16,004,253,000 15,805,726,000 15,538,565,000 15,185,101,000 15,028,258,000 14,875,018,000 14,701,483,000 14,435,703,000 14,313,532,000 13,980,348,000 13,508,686,000 13,379,615,000 13,111,018,000 12,362,703,000 11,808,155,000     9,896,747,000 9,967,579,000 9,741,978,000 9,375,392,000 9,112,866,000 
        palo verde sale leaseback, net of accumulated depreciation of 110,886 and 268,894
       32,035,000                                                            
        intangible assets, net of accumulated amortization of 1,057,812 and 925,880
       575,978,000                                                            
        nuclear fuel, net of accumulated amortization of 111,096 and 115,894
       104,274,000                                                            
        assets for pension and other postretirement benefits
        376,338,000 364,229,000 353,910,000 342,102,000 351,546,000 339,071,000 334,765,000 323,438,000 407,065,000 396,615,000 405,409,000  595,511,000 577,399,000 563,019,000 545,723,000 529,715,000 407,821,000 418,427,000 502,992,000                                        
        assets held for sale
               35,139,000 31,706,000                     95,364,000                        202,645,000      
        palo verde sale leaseback, net of accumulated depreciation of 268,894 and 264,624
           82,556,000                                                        
        intangible assets, net of accumulated amortization of 925,880 and 885,505
           591,310,000                                                        
        nuclear fuel, net of accumulated amortization of 115,894 and 118,074
           97,850,000                                                        
        palo verde sale leaseback, net of accumulated depreciation of 264,624 and 260,754
               86,426,000                                                    
        intangible assets, net of accumulated amortization of 885,505 and 817,961
               267,110,000                                                    
        nuclear fuel, net of accumulated amortization of 118,074 and 126,157
               99,490,000                                                    
        accounts receivable
                   132,061,000                                                
        investments in subsidiaries
                   7,105,789,000                                                
        pension liabilities
                   8,218,000                                                
        common stock equity
                                                                   
        total pinnacle west shareholders’ equity
                   6,048,647,000                                      3,316,109,000          
        nuclear decommissioning trust
                       1,294,757,000   1,159,699,000 1,138,435,000 1,069,837,000 1,024,033,000 920,426,000 1,010,775,000 967,673,000 950,448,000 919,309,000 851,134,000 906,687,000 873,643,000 861,439,000 871,000,000 841,980,000 822,244,000 805,048,000 779,586,000 779,753,000 767,416,000 751,954,000 735,196,000 712,011,000 723,582,000 727,342,000 713,866,000 690,226,000 642,007,000 570,625,000 513,733,000 469,886,000 414,576,000 343,052,000         
        palo verde sale leaseback, net of accumulated depreciation of 256,884 and 253,014
                       94,166,000                                            
        intangible assets, net of accumulated amortization of 737,694 and 698,500
                       273,693,000                                            
        nuclear fuel, net of accumulated amortization of 133,122 and 137,207
                       106,039,000                                            
        palo verde sale leaseback, net of accumulated depreciation of 253,014 and 249,144
                           98,036,000                                        
        intangible assets, net of accumulated amortization of 698,500 and 647,276
                           282,570,000                                        
        nuclear fuel, net of accumulated amortization of 137,207 and 137,330
                           113,645,000                                        
        palo verde sale leaseback, net of accumulated depreciation of 249,144 and 245,275
                               101,906,000                                    
        intangible assets, net of accumulated amortization of 647,276 and 591,202
                               290,564,000                                    
        nuclear fuel, net of accumulated amortization of 137,330 and 137,850
                               123,500,000                                    
        palo verde sale leaseback, net of accumulated depreciation of 245,275 and 241,405
                                   105,775,000                                
        intangible assets, net of accumulated amortization of 591,202 and 582,272
                                   262,902,000                                
        nuclear fuel, net of accumulated amortization of 137,850 and 144,070
                                   120,217,000                                
        liabilities held for sale
                                     26,457,000                              
        palo verde sale leaseback, net of accumulated depreciation of 241,405 and 237,535
                                       109,645,000                            
        intangible assets, net of accumulated amortization of 582,272 and 603,637
                                       257,189,000                            
        nuclear fuel, net of accumulated amortization of 144,070 and 147,202
                                       117,408,000                            
        accumulated other comprehensive loss:
                                                                   
        pension and other postretirement benefits
                                        -39,091,000 -39,882,000 -38,548,000 -39,070,000 -36,960,000 -37,764,000 -37,063,000 -37,593,000 -56,421,000 -57,290,000 -57,173,000 -57,756,000 -49,881,000    -59,420,000 -50,892,000 -47,547,000 -39,336,000 -19,263,000       
        derivative instruments
                                        -3,026,000 -3,744,000 -4,315,000 -4,752,000 -5,186,000 -5,955,000 -6,707,000 -7,155,000 -7,569,000 -8,310,000 -9,209,000 -10,385,000 -12,521,000    -100,347,000 -80,695,000 -99,151,000 23,473,000 31,531,000 262,397,000 59,243,000 76,102,000 68,135,000 56,351,000  
        total accumulated other comprehensive loss
                                        -42,117,000 -43,626,000 -42,863,000 -43,822,000 -42,146,000 -43,719,000 -43,770,000 -44,748,000 -63,990,000 -65,600,000 -66,382,000 -68,141,000 -62,402,000    -159,767,000 -131,587,000 -146,698,000    -22,545,000   -10,213,000 -55,576,000 
        palo verde sale leaseback, net of accumulated depreciation of 237,535 and 233,665
                                           113,515,000                        
        intangible assets, net of accumulated amortization of 603,637 and 546,038
                                           90,022,000                        
        nuclear fuel, net of accumulated amortization of 147,202 and 146,228
                                           119,004,000                        
        deferred fuel and purchased power regulatory liability
                                             2,439,000 13,083,000 9,688,000 12,222,000 16,209,000 16,359,000      58,442,000 87,291,000          
        other regulatory liabilities
                                           99,899,000 104,313,000 113,733,000 122,471,000 136,078,000 135,970,000 136,273,000 113,024,000     88,362,000 694,589,000 679,072,000          
        palo verde sale leaseback, net of accumulated depreciation of 233,665 and 229,795
                                               117,385,000                    
        intangible assets, net of accumulated amortization of 546,038 and 489,538
                                               123,975,000                    
        nuclear fuel, net of accumulated amortization of 146,228 and 143,554
                                               123,139,000                    
        palo verde sale leaseback, net of accumulated depreciation of 229,795 and 225,925
                                                   121,255,000                
        intangible assets, net of accumulated amortization of 489,538 and 439,703
                                                   119,755,000                
        nuclear fuel, net of accumulated amortization of 143,554 and 146,057
                                                   125,201,000                
        liability for asset retirements
                                                   32,462,000  32,896,000 357,097,000 279,643,000 328,571,000 301,783,000 275,970,000 281,903,000 268,389,000 269,011,000 251,612,000     
        liabilities for pension and other postretirement benefits
                                                   453,736,000 233,292,000 513,628,000 1,058,755,000 1,268,910,000 813,121,000 811,338,000 675,788,000 504,603,000 588,852,000       
        palo verde sale leaseback, net of accumulated depreciation of 225,925 and 222,055
                                                     125,125,000              
        intangible assets, net of accumulated amortization of 439,703 and 411,543
                                                     157,689,000              
        nuclear fuel, net of accumulated amortization of 146,057 and 133,950
                                                     124,557,000              
        palo verde sale leaseback, net of accumulated depreciation of 222,055 and 218,186
                                                      128,995,000             
        intangible assets, net of accumulated amortization of 411,543 and 373,706
                                                      162,150,000             
        nuclear fuel, net of accumulated amortization of 133,950 and 113,375
                                                      122,778,000             
        palo verde sale leaseback lessor notes less current maturities
                                                      38,869,000 65,547,000 96,803,000           
        total long-term debt less current maturities
                                                      3,199,088,000 3,019,054,000 3,045,794,000           
        palo verde sale leaseback, net of accumulated depreciation of 218,186 and 213,094
                                                       132,864,000            
        intangible assets, net of accumulated amortization of 373,706 and 330,584
                                                       170,571,000            
        nuclear fuel, net of accumulated amortization of 113,375 and 85,270
                                                       118,098,000            
        real estate investments — net
                                                         119,989,000          
        palo verde sale leaseback, net of accumulated depreciation of 213,094 and 204,328
                                                        137,956,000           
        intangible assets, net of accumulated amortization of 330,584 and 294,724
                                                        184,952,000           
        nuclear fuel, net of accumulated amortization of 85,270 and 64,544
                                                        108,794,000           
        accrued utility revenues
                                                         110,971,000 100,089,000    93,227,000 120,532,000 126,058,000 89,347,000 106,861,000 
        home inventory
                                                         3,282,000 50,688,000 98,729,000        
        less accumulated depreciation and amortization
                                                         -4,340,645,000 4,141,546,000 4,004,944,000 3,797,475,000 3,622,884,000 3,365,954,000 3,303,970,000 3,251,782,000 3,195,467,000 3,464,840,000 
        intangible assets, net of accumulated amortization of 294,724 and 282,196
                                                         164,380,000          
        nuclear fuel, net of accumulated amortization of 64,544 and 55,343
                                                         118,243,000          
        other deferred debits
                                                         101,274,000 115,505,000 114,794,000 104,691,000 135,884,000 107,428,000 109,755,000 110,579,000 115,663,000 118,810,000 
        noncontrolling real estate interests
                                                         29,571,000          
        assets from risk management and trading activities
                                                          32,581,000 97,373,000 641,040,000 827,779,000 166,896,000 164,572,000 166,528,000 151,521,000 84,276,000 
        real estate investments – net
                                                          415,296,000 532,600,000 526,008,000 390,702,000 382,398,000     
        assets from long-term risk management and trading activities
                                                          33,675,000 89,913,000 167,211,000 597,831,000      
        intangible assets, net of accumulated amortization of 282,196 and 252,122
                                                          131,722,000         
        nuclear fuel, net of accumulated amortization of 55,343 and 68,375
                                                          89,323,000         
        liabilities and common stock equity
                                                                   
        liabilities from risk management and trading activities
                                                          69,585,000 65,028,000 558,195,000 720,693,000 113,406,000 133,355,000 131,841,000 108,601,000 86,095,000 
        accumulated other comprehensive income:
                                                                   
        total common stock equity
                                                          3,445,979,000 3,531,611,000 3,446,116,000 3,424,964,000 2,950,196,000 2,976,753,000 2,894,560,000 2,850,396,000  
        total liabilities and common stock equity
                                                          11,620,093,000 11,243,712,000 11,455,943,000 11,322,645,000      
        investment in debt securities
                                                            32,700,000  181,175,000     
        decommissioning trust accounts
                                                           379,347,000 343,771,000 293,943,000 267,700,000 253,020,000 253,522,000 246,002,000  
        intangible assets, net of accumulated amortization of 252,122 and 218,836
                                                           105,746,000        
        nuclear fuel, net of accumulated amortization of 68,375 and 50,741
                                                           69,271,000        
        unamortized gain – sale of utility plant
                                                           36,606,000 41,182,000 45,757,000 50,333,000     
        total accumulated other comprehensive income
                                                           -15,863,000 12,268,000 165,120,000  9,538,000 1,571,000   
        intangible assets, net of accumulated amortization of 218,836 and 182,576
                                                            96,100,000       
        nuclear fuel, net of accumulated amortization of 50,741 and 53,984
                                                            60,100,000       
        total
                                                             7,104,811,000 7,120,694,000 7,093,825,000 7,099,784,000 6,773,627,000  
        intangible assets, net of accumulated amortization of 182,576 and 158,584
                                                             90,916,000      
        nuclear fuel, net of accumulated amortization of 53,984 and 59,020
                                                             54,184,000      
        net property, plant and equipment
                                                             7,577,083,000 7,535,487,000 7,459,790,000 7,452,276,000 7,496,976,000  
        pension liability
                                                             264,476,000 234,445,000 197,039,000 217,714,000 202,745,000 186,496,000 
        minimum pension liability adjustment
                                                             -97,277,000 -81,788,000 -66,564,000 -66,564,000 -66,564,000  
        assets related to discontinued operations
                                                                   
        assets from risk management and trading activities- long term
                                                              224,341,000     
        intangible assets, net of accumulated amortization of 158,584 and 128,126
                                                              105,486,000     
        nuclear fuel, net of accumulated amortization of 59,020 and 58,053
                                                              51,188,000     
        deferred debits regulatory assets
                                                              135,051,000     
        liabilities related to discontinued operations
                                                                   
        liabilities from risk management and trading activities-long term
                                                              156,262,000     
        nac assets held for sale
                                                               13,941,000    
        real estate investments—net
                                                               381,494,000  345,843,000 378,015,000 
        assets from risk management and trading activities - long-term
                                                               231,657,000 206,647,000 175,191,000  
        nac liabilities held for sale
                                                               9,971,000    
        liability for asset retirement
                                                               246,774,000 242,687,000 238,566,000 230,865,000 
        liabilities from risk management and trading activities - long-term
                                                               124,703,000 129,380,000 111,998,000  
        unamortized gain — sale of utility plant
                                                               51,477,000   56,053,000 
        real estate investments-net
                                                                351,659,000   
        unamortized gain - sale of utility plant
                                                                52,621,000 53,765,000  
        customer and other receivables—net
                                                                  421,428,000 
        real estate assets held for sale
                                                                   
        assets from risk management and trading activities — long-term
                                                                  156,950,000 
        real estate liabilities held for sale
                                                                   
        liabilities from risk management and trading activities — long-term
                                                                  94,448,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 
                                                                                                   
          cash flows from operating activities
                                                                                                   
          net income
        35,114,000 17,597,000 417,514,000 196,870,000 -338,000 -2,521,000 399,272,000 208,111,000 21,168,000 4,283,000 402,520,000 110,969,000 1,009,000 -19,686,000 330,632,000 168,618,000 21,262,000 31,890,000 344,104,000 219,436,000 40,514,000 -14,518,000 351,245,000 198,459,000 34,866,000 68,854,000 317,149,000 149,019,000 22,791,000 30,949,000 319,885,000 171,612,000 8,094,000 26,502,000 280,945,000 172,317,000 28,185,000 58,119,000 267,900,000 126,182,000 9,326,000 45,978,000 261,978,000 127,507,000 20,727,000 9,535,000 248,086,000 141,384,000 24,691,000 32,814,000 234,718,000 139,598,000 32,836,000 30,671,000 252,863,000 130,111,000 -481,000 19,990,000 262,785,000 93,839,000 -9,674,000 12,501,000 239,039,000 119,566,000 -897,000 -29,990,000 186,070,000 68,195,000 -170,720,000 -38,850,000 151,586,000 133,862,000 -4,473,000 2,911,000 208,708,000 78,994,000 16,530,000 18,479,000 184,167,000 112,154,000 12,455,000 21,347,000 103,737,000 26,735,000 24,448,000 33,729,000 107,940,000 71,370,000 30,156,000   
          adjustments to reconcile net income to net cash from operating activities:
                                                                                                   
          depreciation and amortization including nuclear fuel
        259,841,000 237,972,000 239,418,000 241,574,000 250,651,000 244,597,000 246,041,000 239,133,000 226,413,000 217,912,000 219,572,000 207,880,000 208,772,000 204,856,000 207,831,000 201,488,000 203,639,000 186,800,000 181,805,000 174,127,000 176,409,000 170,511,000 172,569,000 170,005,000 173,168,000 163,339,000 168,616,000 164,384,000 167,801,000 161,094,000 164,311,000 161,984,000 163,566,000 164,922,000 154,422,000 143,424,000 147,861,000 142,160,000 140,560,000 141,532,000 140,759,000 143,543,000 145,903,000 140,724,000 141,494,000 124,765,000 125,351,000 123,977,000 122,394,000 114,351,000 128,489,000 125,138,000 124,344,000 120,692,000 120,827,000 121,256,000 118,487,000 123,677,000 124,407,000 122,402,000 123,298,000 122,045,000 120,798,000 115,842,000 114,122,000 110,628,000 113,593,000 108,866,000 110,073,000 106,603,000 108,011,000 104,937,000 104,418,000 101,582,000 103,421,000 100,174,000 98,719,000 98,695,000 99,202,000 93,791,000 95,072,000 89,414,000          
          allowance for equity funds used during construction
        -14,782,000 -15,459,000 -17,671,000 -14,767,000 -13,249,000 -9,830,000 -9,588,000 -8,910,000 -10,292,000 -13,047,000 -11,976,000 -13,034,000 -15,061,000 -14,297,000 -9,133,000 -12,086,000 -9,747,000 -11,188,000 -11,352,000 -9,990,000 -9,207,000 -9,124,000 -8,144,000 -8,811,000 -7,697,000 -6,754,000 -5,917,000 -7,572,000 -11,188,000 -12,908,000 -12,259,000 -13,073,000 -14,079,000 -14,345,000 -12,728,000 -10,456,000 -9,482,000 -11,061,000 -10,194,000 -10,369,000 -10,516,000 -9,001,000 -7,645,000 -9,345,000 -9,224,000 -8,811,000               -5,395,000 -5,649,000 -5,524,000 -5,504,000 -5,389,000 -3,080,000 -2,197,000 -4,730,000 -4,992,000 -2,425,000 -4,673,000 -5,414,000 -6,124,000 -6,321,000 -5,235,000 -5,195,000 -4,444,000 -3,700,000 -3,178,000 -3,633,000 -3,801,000 -2,784,000 -2,852,000 -2,952,000 -2,603,000 -2,026,000 1,327,000 -2,184,000 -2,002,000   
          deferred income taxes
        3,245,000 -41,221,000 -11,068,000 644,000 795,000 -7,572,000 -13,690,000 23,636,000 -23,297,000 10,948,000 550,000 -30,658,000 -5,150,000 -238,000 21,271,000 18,334,000 3,835,000 13,343,000 73,897,000 41,308,000 -11,077,000 -21,608,000 68,848,000 40,315,000 -18,086,000 -85,182,000 79,377,000 706,000 3,620,000 -216,000 83,860,000 33,940,000 -229,000 36,915,000 116,884,000 84,008,000 10,357,000 11,955,000 129,034,000 62,413,000 3,468,000 68,748,000 102,694,000 58,399,000 6,978,000 22,246,000 104,166,000 23,801,000 8,810,000 -6,836,000 187,606,000 56,363,000 12,163,000 22,101,000 140,359,000   44,610,000 119,637,000 52,950,000 -41,005,000 -21,075,000 230,514,000 127,000 50,845,000 -49,025,000 76,929,000 81,489,000 -3,901,000 -70,543,000 74,318,000 199,030,000 -44,781,000 -104,050,000 49,356,000 9,419,000 -12,752,000 24,140,000 -12,883,000 14,724,000 1,757,000 27,239,000 -14,836,000 -31,928,000 -4,281,000 -146,408,000 8,704,000 14,794,000 9,060,000   
          deferred investment tax credit
        -1,090,000 68,791,000 -6,718,000 -3,337,000 36,000 2,034,000 -6,205,000 -3,788,000 -294,000 4,062,000 30,402,000 38,852,000 3,749,000 1,259,000 -4,614,000 -2,219,000 -319,000 3,531,000 -4,682,000 -3,122,000 -529,000 3,445,000 -5,155,000 -2,921,000 -465,000 3,350,000 -4,632,000 -2,303,000 -353,000 2,227,000 -4,619,000 -2,631,000 -147,000 -294,000 -1,099,000 -2,850,000 -344,000 29,424,000 -4,259,000 -1,969,000 -114,000 -1,069,000 11,760,000 -1,924,000 -294,000 1,040,000 -3,669,000   36,378,000 -3,995,000                                         
          stock compensation
        8,252,000 6,205,000 8,896,000 5,196,000 7,160,000 6,592,000 6,318,000 4,687,000 5,935,000 5,037,000 5,079,000 3,590,000 3,635,000 3,118,000 4,952,000 2,534,000 5,338,000 1,752,000 3,224,000 2,147,000 11,337,000 6,173,000 2,989,000 2,848,000 6,282,000 1,890,000 2,761,000 1,651,000 12,074,000 3,407,000 2,951,000 2,652,000 10,537,000 3,949,000 3,662,000 2,894,000 9,997,000                                                       
          changes in current assets and liabilities:
                                                                                                   
          customer and other receivables
        79,215,000 201,940,000 -205,628,000 -141,387,000 93,800,000 318,171,000 -273,065,000 -142,690,000 84,888,000 152,308,000 -189,543,000 -27,579,000 2,831,000 149,312,000 -182,035,000 -97,292,000 66,146,000 38,025,000 -69,446,000 -91,683,000 50,545,000 100,807,000 -126,765,000 -17,808,000 25,575,000 78,717,000 -95,049,000 -11,933,000 15,476,000 102,733,000 -46,531,000 -108,190,000 89,518,000 113,123,000 -144,296,000 -109,631,000 47,007,000 75,419,000 -58,010,000 -67,180,000 47,282,000 85,044,000 -89,861,000 -56,576,000 39,174,000 96,381,000   25,986,000    3,931,000    52,264,000   -32,257,000 75,528,000 36,030,000 -96,840,000 -67,377,000 60,244,000 91,589,000 -116,744,000 -38,943,000 76,390,000 171,872,000 -53,711,000 -100,612,000 63,285,000 183,682,000 -142,757,000 -127,172,000 149,097,000 81,343,000 -71,390,000 -130,704,000 129,940,000 87,687,000 -164,132,000 -64,379,000 102,061,000 60,921,000 -104,780,000 -46,102,000 72,437,000   
          accrued unbilled revenues
        -34,891,000 84,182,000 14,453,000 -95,558,000 134,000 84,938,000 52,877,000 -148,239,000 1,074,000 59,445,000 -10,258,000 -73,464,000 21,488,000 56,259,000 13,500,000 -101,758,000 1,215,000 56,551,000 33,387,000 -101,884,000 10,163,000 43,144,000 16,237,000 -98,144,000 34,731,000 27,671,000 37,821,000 -79,580,000 23,093,000 59,203,000 11,514,000 -88,898,000 -6,555,000 39,542,000 61,727,000 -112,477,000 6,723,000 42,582,000 47,040,000 -107,776,000 6,445,000 66,029,000 22,947,000 -90,816,000 6,133,000 55,503,000   7,889,000    4,698,000    20,511,000    9,633,000 76,714,000 -17,565,000 -75,975,000 24,505,000                           
          materials, supplies and fossil fuel
        2,000,000 -26,460,000 -11,754,000 -22,727,000 -2,770,000 26,598,000 21,005,000 -59,872,000 4,374,000 282,000 -1,037,000 -27,764,000 -14,392,000 -10,846,000 -38,308,000 -22,423,000 -11,892,000 13,874,000 -15,295,000 -26,648,000 -4,801,000 4,780,000 -3,452,000 4,850,000 5,445,000 -33,494,000 2,955,000 -8,230,000 -13,057,000 14,488,000 2,379,000 -6,363,000 -16,607,000 -4,802,000 3,556,000 -4,770,000 -667,000 2,947,000 -5,989,000 26,000 1,525,000 -1,408,000 -4,226,000 -8,316,000 -9,995,000 7,070,000               21,421,000 -6,735,000 5,434,000 7,337,000 6,240,000 4,520,000 4,847,000 -9,832,000 -11,796,000 -11,926,000 -9,539,000 7,430,000 -11,418,000 10,000 -6,291,000 -9,057,000 -14,438,000 -9,229,000 -445,000 -3,606,000 4,186,000 -1,255,000 192,000 -5,806,000 -9,967,000 -10,000 -129,000 -908,000 3,668,000   
          income tax receivable
        -2,437,000     332,000 -333,000 4,240,000 7,460,000 2,387,000 -14,086,000 6,972,000 542,000 -7,514,000 6,792,000 -2,467,000 12,797,000 3,477,000 1,128,000 -7,664,000        4,073,000 5,458,000 -5,780,000 -3,751,000 4,637,000 -4,048,000 -589,000 3,317,000 -219,000 -3,098,000 4,647,000 130,870,000                                           
          deferred fuel and purchased power
        -26,521,000 -48,155,000 -180,477,000 -70,622,000 -25,228,000 -6,179,000 -179,889,000 -31,126,000 -33,094,000 -63,495,000 -295,078,000 -100,999,000 -90,305,000 -63,509,000 -129,776,000 -92,597,000 -6,110,000 -32,330,000 -88,636,000 -83,695,000 -52,210,000 -10,972,000 -56,206,000 -20,688,000 -5,785,000 -21,570,000 -44,209,000 -33,411,000 16,709,000 4,209,000 -32,374,000 -31,162,000 -18,950,000 -5,057,000 -21,355,000 -21,005,000 -988,000 -14,118,000 -25,159,000 -22,033,000 1,007,000 15,134,000 -11,848,000 -5,960,000 17,671,000 -47,000 -28,195,000 -30,315,000 31,630,000 8,585,000 -23,090,000 4,989,000 31,194,000 20,040,000 -30,728,000 35,507,000 46,754,000 38,201,000 -33,714,000 14,732,000 49,947,000 43,611,000 -15,229,000 21,209,000 44,040,000 -4,999,000 -59,887,000 -15,094,000 28,238,000 24,591,000 -78,907,000 -35,589,000 9,722,000 6,929,000 -71,049,000 -105,723,000 -26,293,000 -21,461,000 -136,823,000 -80,027,000 -14,538,000 -29,950,000          
          deferred fuel and purchased power amortization
        120,157,000 104,140,000 157,836,000 116,246,000 84,789,000 85,856,000 135,282,000 96,196,000 108,552,000 126,966,000 201,691,000 137,682,000 80,904,000 47,972,000 74,765,000 57,400,000 39,442,000 19,362,000 14,367,000 11,392,000 -564,000 -2,752,000 -4,480,000 -3,007,000 -1,808,000 10,907,000 15,294,000 10,435,000 12,872,000 24,353,000 41,546,000 30,849,000 20,002,000 3,386,000 -4,490,000 -9,491,000 -4,172,000 9,786,000 14,588,000 11,390,000 2,388,000 -17,667,000 7,860,000 5,810,000 5,614,000 9,033,000 13,325,000 10,377,000 8,022,000 8,032,000 12,237,000 9,799,000 1,122,000        -31,238,000 -26,555,000 -40,432,000 -29,541,000 -25,953,000 31,804,000 49,051,000 37,202,000 28,961,000 25,127,000 43,734,000 63,556,000 50,709,000 32,429,000 57,752,000 72,159,000 68,766,000 70,210,000 102,471,000             
          other current assets
        -23,346,000 -37,188,000 36,048,000 -26,843,000 -15,008,000 -24,163,000 27,062,000 -20,818,000 -32,306,000 -7,965,000 24,024,000 -27,499,000 -8,110,000 21,795,000 49,077,000 -8,152,000 13,347,000 -3,591,000 -5,108,000 -4,979,000 -9,042,000 -10,113,000 4,369,000 -4,694,000 -20,202,000 6,597,000 6,017,000 -6,006,000 -10,115,000 10,183,000 12,592,000 11,733,000 -664,000 11,463,000 1,375,000 -6,065,000 -17,353,000 -11,659,000 -6,016,000 2,482,000 -8,131,000 1,151,000 10,722,000 903,000 -9,631,000 8,812,000               -636,000 18,482,000 560,000 -4,960,000 -8,836,000 -35,494,000 27,740,000 -721,000 -711,000 -17,172,000 3,375,000 23,042,000 -511,000 -23,391,000 9,541,000 -715,000 4,525,000 -5,621,000 12,488,000 11,343,000 -7,537,000 5,535,000 -719,000 -22,766,000 -10,265,000 -6,719,000 4,617,000 27,495,000 -398,000   
          accounts payable
        -79,111,000 90,328,000 -47,160,000 71,960,000 56,010,000 -32,172,000 -74,555,000 75,714,000 23,799,000 3,980,000 -77,552,000 67,525,000 -69,576,000 -47,357,000 32,584,000 118,722,000 -13,873,000 1,262,000 -47,553,000 42,093,000 24,465,000 341,000 -24,172,000 22,964,000 -5,192,000 16,742,000 -31,975,000 39,281,000 26,593,000 -3,203,000 -48,013,000 62,352,000 -25,738,000 489,000 -46,029,000 -376,000 22,147,000 -9,680,000 -104,858,000 86,064,000 -38,443,000 18,981,000 -89,881,000 72,307,000 -35,673,000 6,818,000 -37,896,000   710,000 -40,859,000 73,638,000 11,925,000     29,006,000 -8,477,000 62,360,000 -24,543,000 -27,562,000 -8,626,000 68,647,000 -23,334,000 8,595,000 13,788,000 28,379,000 -78,090,000 -58,868,000 -10,172,000 84,157,000 -84,556,000 7,453,000 -35,813,000 111,141,000 -124,785,000 23,553,000 21,935,000 33,034,000 -124,577,000 -13,897,000 114,804,000 72,168,000 -179,467,000 60,874,000 48,168,000 40,967,000 -52,008,000   
          accrued taxes
        53,401,000 -161,771,000 142,916,000 -26,923,000 56,520,000 -165,777,000 140,426,000 -23,637,000 58,018,000 -98,629,000 101,666,000 -50,688,000 50,044,000 -121,249,000 103,762,000 -40,565,000 53,847,000 -84,859,000 70,467,000 -30,499,000 53,985,000 -61,807,000 69,871,000 -43,245,000 49,833,000 -76,031,000 62,009,000 -41,028,000 45,130,000 -72,027,000 70,484,000 -37,844,000 45,984,000 -79,845,000 78,082,000 -31,961,000 43,706,000 -80,478,000 74,358,000 -36,722,000 43,289,000 -112,079,000 94,867,000 -32,912,000 48,111,000 -109,319,000 88,225,000 -17,430,000 48,139,000 -52,860,000                  -87,908,000 -81,846,000     6,557,000    -152,466,000 80,063,000 12,361,000 37,713,000 -94,229,000 67,585,000 38,500,000 31,768,000 74,202,000 82,702,000 -14,953,000 33,891,000   
          other current liabilities
        -41,432,000 -4,749,000 22,281,000 42,573,000 -41,391,000 -26,848,000 85,238,000 44,282,000 -55,343,000 22,436,000 80,428,000 21,885,000 -84,239,000 -18,631,000 19,891,000 32,895,000 -40,211,000 -25,595,000 13,147,000 6,390,000 -46,028,000 15,574,000 52,280,000 17,762,000 -63,096,000 -15,724,000 -7,657,000 24,980,000 -86,250,000 15,322,000 3,442,000 21,440,000 -12,030,000 15,218,000 48,714,000 57,023,000 -101,801,000 41,977,000 -66,295,000 91,952,000 -38,040,000 -16,349,000 30,090,000 43,609,000 -56,747,000 -30,515,000 28,429,000       6,798,000 16,264,000   -9,942,000 26,333,000 41,373,000 -37,406,000 -5,785,000 33,708,000 13,863,000 -36,582,000 3,466,000 33,785,000 12,767,000 -20,744,000 -84,568,000 90,662,000 -54,430,000 30,057,000 -33,516,000 -7,918,000 42,849,000 21,242,000 -13,884,000 29,893,000 -19,186,000 24,940,000 -250,008,000 138,476,000 70,117,000 42,982,000 6,046,000 -4,216,000 10,740,000 21,099,000   
          change in long-term regulatory assets
        2,611,000 19,323,000 33,058,000 21,378,000 17,614,000 11,173,000 13,949,000 8,333,000 9,850,000                                                                                   
          change in long-term regulatory liabilities
        -58,507,000 -8,962,000 1,307,000 32,827,000 12,033,000 -34,032,000 48,085,000 -21,130,000 16,493,000                                                                                   
          change in other long-term assets
        -17,201,000 -61,255,000 -81,748,000 -95,091,000 -45,413,000 -6,184,000 -82,890,000 -23,918,000 -19,571,000 -123,701,000 32,684,000 -46,545,000 -58,036,000 68,222,000 34,586,000 121,860,000 52,153,000 -68,907,000 -59,530,000 -81,259,000 -36,777,000 -57,301,000 -5,267,000 -86,028,000 81,143,000 -30,619,000 30,574,000 -17,380,000 -65,470,000 63,896,000 -10,139,000 28,216,000 -3,369,000 -8,517,000 -10,801,000 -12,326,000 -36,836,000 -574,000 -18,488,000 -23,597,000 -17,504,000 -12,616,000 19,859,000 9,615,000 -14,432,000 -9,339,000               -33,129,000 8,470,000 -46,117,000 20,361,000 -25,903,000 26,000 -39,900,000 -16,922,000 8,897,000 -5,048,000 2,064,000 -7,057,000 16,145,000 -12,487,000 50,015,000 -8,238,000 -11,900,000 26,939,000 -11,141,000 6,779,000 -2,247,000 -18,792,000 -23,018,000 1,146,000 4,871,000 -14,259,000 -4,751,000 -10,511,000 -10,189,000 1,449,000 2,492,000 
          change in operating lease assets
        -5,826,000 20,250,000 -7,167,000 134,550,000 3,889,000 3,446,000 74,983,000 28,201,000 -8,416,000 689,000 71,838,000 26,918,000 -8,920,000  68,322,000 29,435,000 324,000                                                                           
          change in other long-term liabilities
        -27,917,000 -14,314,000 209,887,000 -16,212,000 -40,427,000 -24,900,000 95,150,000 -27,967,000 -17,489,000 -12,461,000 -86,640,000 23,532,000 138,649,000 304,663,000 -51,360,000 -136,743,000 -47,883,000 9,814,000 -84,633,000 47,204,000 -1,963,000 24,492,000 -114,577,000 10,070,000 -106,212,000 -105,617,000 -30,244,000 -10,511,000 13,706,000 23,453,000 5,735,000 -7,173,000 -70,973,000 -4,800,000 -38,459,000 11,675,000 1,604,000 -57,954,000 -33,850,000 4,475,000 4,536,000 27,766,000 -75,914,000 -42,072,000 8,261,000 -24,088,000      -16,151,000 37,904,000 -7,380,000 32,146,000 -17,327,000 22,362,000 -16,081,000 16,817,000 22,327,000 35,421,000 -72,909,000 23,379,000 -12,376,000 -39,550,000 -5,021,000 -34,827,000 29,617,000 17,281,000 24,273,000 -45,637,000 34,377,000 11,738,000 -7,684,000 30,443,000 14,708,000 9,695,000 -31,472,000 34,249,000 8,462,000 12,169,000 -15,518,000 55,986,000 30,924,000 3,181,000 -1,126,000 10,776,000 21,350,000 1,075,000 -18,388,000 20,588,000 
          change in operating lease liabilities
        4,521,000 -29,525,000 -49,234,000 -88,920,000 2,288,000 -3,735,000 -72,613,000 -26,413,000 9,547,000 3,055,000 -98,916,000 -21,047,000 51,129,000  -70,721,000 -28,575,000 953,000                                                                           
          net cash from operating activities
        235,296,000 476,780,000 664,989,000 261,431,000 401,895,000 439,492,000 633,193,000 189,785,000 347,353,000 373,798,000 396,286,000 226,008,000 211,605,000 209,527,000 443,628,000 247,678,000 340,608,000 199,501,000                                                                          
          cash flows from investing activities
                                                                                                   
          capital expenditures
        -628,361,000 -669,516,000 -623,034,000 -709,516,000 -622,552,000 -531,624,000 -665,846,000 -533,969,000 -517,756,000 -531,841,000 -396,334,000 -473,024,000 -445,171,000 -430,629,000 -433,642,000 -451,636,000 -391,583,000 -467,044,000                                                                          
          free cash flows
        -393,065,000 -192,736,000 41,955,000 -448,085,000 -220,657,000 -92,132,000 -32,653,000 -344,184,000 -170,403,000 -158,043,000 -48,000 -247,016,000 -233,566,000 -221,102,000 9,986,000 -203,958,000 -50,975,000 -267,543,000                                                                          
          contributions in aid of construction
        90,226,000 140,182,000 58,482,000 56,472,000 51,244,000 75,497,000 91,532,000 75,282,000 69,047,000 68,104,000 52,644,000 34,953,000 25,165,000 34,070,000 34,487,000 40,617,000 28,262,000 38,376,000 35,174,000 16,808,000 15,296,000 21,046,000 10,162,000 28,143,000 3,152,000 36,572,000 15,212,000 10,971,000 7,938,000 5,105,000 3,272,000 10,770,000 8,569,000 -1,216,000 6,892,000 12,057,000 5,975,000 24,941,000 10,228,000 16,663,000 12,464,000 12,564,000 -7,028,000 13,788,000 27,222,000 11,788,000 -4,109,000 4,910,000 7,736,000 6,180,000 13,674,000 6,324,000 14,912,000 8,425,000 15,651,000 11,929,000 13,871,000 1,745,000 14,446,000 12,769,000 9,136,000 7,496,000 10,095,000 12,214,000 2,949,000 36,132,000 -15,978,000 14,609,000 18,762,000 19,342,000 17,980,000 12,930,000 10,040,000                   
          allowance for borrowed funds used during construction
        -9,863,000 -12,093,000 -13,979,000 -11,559,000 -10,102,000 -12,192,000 -11,901,000 -11,036,000 -13,141,000 -9,433,000 -9,092,000 -12,317,000 -12,722,000 -9,649,000 -8,270,000 -5,689,000 -4,422,000 -5,586,000 -5,273,000 -5,199,000 -4,994,000 -5,042,000 -4,663,000 -4,749,000 -4,076,000 -3,883,000 -3,486,000 -4,494,000 -6,665,000 -6,221,000 -5,913,000 -6,291,000 -6,755,000 -6,734,000 -6,000,000 -4,906,000 -4,472,000 -5,122,000 -4,320,000 -5,301,000 -5,227,000 -4,203,000 -3,518,000 -4,322,000 -4,216,000 -4,418,000               -3,576,000 -4,225,000 -6,158,000                             
          proceeds from nuclear decommissioning trusts sales and other special use funds
        512,234,000  455,515,000 433,830,000 485,814,000  367,996,000    598,140,000 340,902,000 226,626,000  218,817,000 330,432,000 361,754,000  209,337,000                                                                         
          investment in nuclear decommissioning trusts and other special use funds
        -513,001,000  -457,594,000 -434,400,000 -486,385,000  -378,182,000    -612,718,000 -341,472,000 -227,196,000  -237,154,000 -331,002,000 -361,809,000  -226,211,000                                                                         
          other
        -2,783,000 -3,562,000 828,000 -2,044,000 -4,134,000 -2,726,000 -2,352,000 -2,396,000 -939,000 -4,670,000 -2,273,000 20,426,000 -19,941,000 -4,555,000 -1,883,000 -2,631,000 -6,543,000 -3,863,000 -488,000 4,835,000 5,974,000 3,939,000 821,000 2,774,000 349,000 2,481,000 1,818,000 2,577,000 4,576,000 1,892,000 4,348,000 -3,000,000 -1,299,000 1,213,000 -18,164,000 -1,334,000 -793,000 -298,000 -17,046,000 -835,000 -472,000 -354,000 -762,000 -1,598,000 -470,000 8,000 337,000 1,000 1,000 -513,000 17,000   -15,000 25,000      -1,879,000 -1,045,000 5,771,000 5,489,000 -1,639,000 -3,263,000 -2,394,000 -511,000 1,501,000 -111,000 3,651,000 1,007,000 970,000 1,203,000 -29,000 -2,355,000 -626,000 -1,517,000 -3,864,000 3,102,000 -1,484,000  -7,780,000 -11,464,000 6,138,000 -10,804,000 3,505,000 -8,086,000 -4,194,000 -18,022,000 -6,420,000 
          net cash from investing activities
        -551,548,000 -545,560,000 -579,782,000 -667,217,000 -586,115,000 -464,307,000 -582,209,000 -463,022,000 -424,092,000 -458,345,000 -352,133,000 -430,532,000 -453,239,000  -427,645,000 -419,909,000 -374,341,000 -424,617,000                                                                          
          cash flows from financing activities
                                                                                                   
          issuance of long-term debt
        594,840,000 947,350,000     102,000 504,111,000 185,136,000 419,909,000 129,826,000 13,750,000 312,052,000 150,000,000 446,999,000 150,000,000 112,850,000 394,936,000   297,207,000 297,657,000 497,324,000 150,000,000    298,761,000 297,843,000 -3,806,000 255,441,000 247,218,000   242,415,000 350,000,000 250,000,000 157,000,000 38,151,000 285,975,000 250,000,000 32,000,000 104,307,000 125,000,000 32,000,000 319,081,000 295,353,000 175,000,000     -113,000 26,952,000 340,947,000 499,683,000 8,384,000 25,423,000 19,437,000 43,690,000 49,250,000 48,261,000 79,803,000 53,257,000 54,353,000 447,299,000 49,136,000 206,848,000 177,000,000 247,812,000 500,004,000 163,999,000  25,000 297,268,000 179,000,000 114,696,000 4,000,000 
          short-term borrowings and (repayments)
        -162,905,000                                                                                           
          dividends paid on common stock
        -108,462,000 -107,329,000 -105,313,000 -105,216,000 -104,934,000 -100,074,000 -98,293,000 -98,214,000 -98,082,000 -98,030,000 -96,221,000 -96,157,000 -96,078,000 -96,043,000 -94,296,000 -94,277,000 -94,265,000 -94,149,000 -91,829,000 -91,779,000 -91,721,000 -91,653,000 -86,358,000 -86,309,000 -86,257,000 -86,527,000 -81,137,000 -81,082,000 -80,897,000 -80,855,000 -76,095,000 -76,039,000 -75,903,000 -75,866,000 -71,407,000 -71,343,000 -71,177,000 -71,114,000 -67,780,000 -67,724,000 -67,611,000 -67,561,000 -64,225,000 -64,180,000 -64,061,000 -58,893,000               -55,300,000 -55,257,000 -55,200,000 -55,101,000 -51,421,000 -51,336,000 -51,301,000 -51,243,000 -51,196,000 -45,770,000 -52,885,000 -52,833,000 -52,759,000 -52,701,000 -52,662,000 -52,615,000 -52,495,000 -52,344,000 -49,649,000 -49,619,000 -49,608,000 -49,443,000 -46,870,000 -46,698,000 -43,666,000 -43,487,000 -41,093,000 -41,112,000 -41,080,000 -41,071,000  
          common stock equity issuance and (purchases)
        -7,415,000                                                                                           
          net cash from financing activities
        316,057,000 44,499,000 -73,163,000 414,580,000 190,429,000 -20,518,000 -5,820,000 267,610,000 81,418,000 74,394,000 -36,703,000 205,231,000 243,753,000 184,424,000 -38,140,000 187,452,000 37,732,000 209,397,000                                                                          
          net increase in cash and cash equivalents
        -195,000 -24,281,000 12,044,000 8,794,000 6,209,000 -45,333,000 45,164,000 -5,627,000 4,679,000 -10,153,000 7,450,000 707,000 2,119,000   15,221,000 3,999,000 -15,719,000   -42,766,000 -121,958,000   52,856,000 -19,569,000   343,000 -59,225,000   1,548,000 3,218,000 5,721,000   -39,386,000 5,227,000 28,556,000 -25,004,000 26,481,000 -550,000 1,893,000 4,060,000    93,895,000  107,654,000          4,005,000 -85,727,000    44,554,000 83,229,000   717,000 7,980,000 79,015,000 -38,788,000    34,043,000 -41,012,000 112,614,000 -299,247,000 160,852,000 -717,250,000 570,850,000 128,287,000 8,750,000 -117,848,000 107,115,000     
          cash and cash equivalents at beginning of period
        6,604,000  3,838,000  4,955,000  4,832,000  9,969,000  59,968,000  10,283,000  5,766,000  13,892,000  8,881,000  39,488,000  7,604,000  9,526,000  26,202,000  33,583,000  110,188,000  145,378,000  105,245,000  56,321,000  87,210,000  154,003,000  163,366,000  -5,867,000 228,779,000  
          cash and cash equivalents at end of period
        6,409,000  12,044,000 8,794,000 10,047,000  45,164,000 -5,627,000 9,634,000  7,450,000 707,000 6,951,000  -22,157,000 15,221,000 13,968,000  11,542,000 -3,056,000 17,202,000  175,163,000 -56,376,000 63,139,000  28,204,000 -4,461,000 6,109,000  61,152,000 -11,601,000 15,440,000  5,721,000 1,925,000 3,028,000  5,227,000 28,556,000 14,484,000  -550,000 1,893,000 11,664,000  1,310,000 -94,260,000 103,421,000  107,654,000 2,694,000 25,109,000  68,251,000 -9,482,000 20,710,000  472,438,000 -21,919,000 114,193,000  145,413,000 46,974,000 3,528,000  83,229,000 -15,209,000 32,804,000  7,980,000 79,015,000 17,533,000  20,442,000 -97,781,000 121,253,000  112,614,000 -299,247,000 314,855,000  570,850,000 128,287,000 172,116,000  101,248,000 252,622,000 19,194,000  107,562,000 
          gain on sale relating to bce
             -22,988,000                                                                                  
          change in derivative instruments fair value
                 1,000 -539,000 -1,025,000 786,000                     -119,000 -32,000 -121,000 -101,000 -125,000 -41,000 -126,000 -111,000 -120,000 -36,000 -121,000 -104,000 39,000 251,000   -3,000 188,000 16,000 333,000                                       
          change in unrecognized tax benefits
                                              -1,052,000    1,034,000            -3,713,000 -6,836,000 18,959,000 -972,000 -10,019,000 -568,000 -62,062,000 45,178,000 78,334,000 15,436,000 -1,050,000 12,518,000 8,268,000 -128,560,000 13,223,000                   
          proceeds from sale relating to bce
             20,000,000 16,544,000 9,097,000 38,681,000 5,900,000                                                                                  
          proceeds from nuclear decommissioning trust sales and other special use funds
                443,870,000            379,978,000 211,633,000 216,026,000 196,772,000 195,087,000 198,038,000 211,642,000 130,306,000 179,048,000 209,818,000 184,814,000                                                             
          investment in nuclear decommissioning trust and other special use funds
                -443,854,000            -380,548,000 -198,359,000 -231,249,000 -197,342,000 -195,658,000 -198,608,000 -213,079,000 -130,876,000 -179,618,000 -210,388,000 -202,235,000                                                             
          repayment of long-term debt
           -200,000,000      -150,000,000     -115,150,000 -650,000,000 -150,000,000 -100,000,000 -500,000,000 -100,000,000       -16,870,000 -276,710,000   -70,723,000   -148,995,000               -175,170,000 -22,043,000 -69,308,000        -32,329,000 -118,172,000 -29,295,000 -42,360,000 -50,899,000 -29,496,000 -39,305,000 -143,064,000 -31,251,000 -313,962,000 -39,587,000 -553,871,000 -303,490,000 -165,868,000 -264,805,000 -729,000 -455,000 -1,343,000 -601,488,000 36,122,000  
          short-term borrowings and (repayments) — net
                                                                                                   
          short-term debt borrowings under term loan facility
         175,000,000   200,000,000                                                                                     
          short-term debt repayments under term loan facility
         -200,000,000                                                                                        
          common stock equity issuance and purchases — net
                                                                                                   
          palo verde sale leaseback noncontrolling interest acquisition
                                                                                                  
          capital activities by noncontrolling interests
         -4,671,000 -2,742,000                                                                                         
          cash and cash equivalents at beginning of year
                                                                                                   
          cash and cash equivalents at end of year
                                                                                                   
          short-term borrowing and (repayments) - net
          -329,299,000 134,802,000 301,747,000  92,050,000 -262,050,000 184,000,000  91,770,000 -192,200,000 156,830,000    -29,050,000                                                                           
          common stock equity issuance and (purchases) - net
          15,585,000 215,000 -6,381,000  423,000 273,000 -4,500,000                                                                                   
          distributions to noncontrolling interests for capital activities
                                                                                                  
          short-term debt repayments under revolving credit facility
                         -15,000,000 -4,000,000        -5,000,000 -25,000,000 -7,000,000 -25,000,000                                                           
          distributions to noncontrolling interests
                 -10,627,000 -1,000   -10,627,000   -10,627,000   -11,371,000   -11,372,000   -11,372,000   -11,372,000   -11,372,000       -4,613,000                                              
          change in margin and collateral accounts - assets
                  -446,000 17,000 11,000                                                                               
          common stock equity issuances and (purchases) - net
                  387,000 104,000 -2,135,000    -1,005,000                                                                           
          change in margin and collateral accounts — assets
                       31,830,000 8,600,000             731,000 332,000 -524,000 -396,000 1,526,000 -1,755,000 -59,000 -12,000 156,000 551,000 -715,000 681,000 967,000 3,261,000 -4,276,000 -276,000 132,000       933,000 236,000 1,856,000   -242,000 12,406,000 16,965,000 4,220,000 -5,601,000 -4,992,000 11,936,000 -11,280,000   21,019,000 -23,476,000                       
          change in margin and collateral accounts — liabilities
                                     -1,229,000 100,000 10,000 -1,092,000 1,092,000 3,075,000   -350,000 75,000 17,600,000 410,000 -7,902,000 3,825,000 40,273,000 -13,420,000 -4,100,000    -2,645,000 400,000 -9,605,000 24,205,000 23,206,000 44,977,000   -56,054,000 46,218,000 4,089,000 35,478,000 55,410,000 -53,031,000 33,801,000 -124,495,000   70,157,000 -162,013,000                       
          net cash used for investing activities
                                                                                                   
          short-term debt borrowings under revolving credit facility
                                     9,000,000 36,000,000   9,000,000 8,000,000                                                       
          common stock equity issuances and (purchases) -net
                                                                                                   
          net decrease in cash and cash equivalents
                                            -5,853,000                           46,974,000 -141,850,000    -72,441,000     12,407,000 20,442,000              -209,585,000   
          short-term borrowing and (repayments) — net
                           304,950,000 49,750,000                                                                       
          common stock equity issuances and (purchases) — net
                                                                                                   
          net cash flow from operating activities
                                     317,381,000 563,961,000   346,112,000     342,575,000 278,266,000 144,209,000                                 180,462,000 187,154,000       -156,713,000 552,863,000   211,633,000      
          net cash flow used for investing activities
                           -301,499,000 -348,069,000 -322,315,000 -302,982,000 -311,361,000 -341,160,000 -298,964,000 -304,375,000 -273,125,000 -254,513,000 -279,508,000 -234,220,000 -318,003,000 -361,093,000 -388,898,000 -351,399,000 -339,556,000 -348,684,000 -241,612,000 -295,009,000 -343,152,000 -372,305,000 -293,445,000 -263,285,000 -276,686,000 -232,817,000 -288,911,000               -192,795,000 -198,681,000 -99,350,000 -67,441,000 -210,428,000 -168,346,000 4,766,000 -359,304,000 -182,033,000 -218,073,000 -217,947,000 -131,021,000 -248,118,000 -195,293,000 -249,605,000   -8,403,000 -386,419,000   -100,657,000 164,208,000 -608,762,000 -39,881,000 -279,697,000 -71,536,000 -56,565,000 -124,155,000 -217,960,000  
          common stock equity issuance — net of purchases
                           562,000 -738,000                                                                       
          net cash flow from financing activities
                                     -97,098,000 -268,589,000   46,004,000     -42,339,000 93,442,000 203,092,000                                 27,238,000 82,893,000        -146,221,000   -49,784,000      
          net cash flow provided by operating activities
                            202,012,000 194,346,000 402,987,000 185,404,000 183,628,000 121,965,000   173,432,000    166,872,000   150,511,000 140,051,000      427,079,000 250,146,000 144,148,000 212,709,000 421,852,000 215,909,000 249,157,000 270,977,000 428,074,000 242,099,000 212,157,000 241,651,000 470,836,000 343,300,000 115,335,000 205,077,000 484,227,000 192,783,000 243,496,000 180,957,000 368,086,000   270,095,000 568,572,000 248,564,000 -56,166,000 29,627,000 105,105,000 433,304,000 245,532,000    214,581,000  226,998,000 53,168,000 3,057,000    195,951,000   157,672,000 226,381,000   
          net cash flow provided by financing activities
                            103,291,000 6,011,000 75,158,000 69,581,000 210,388,000 157,430,000   81,424,000    195,769,000   190,970,000 202,780,000       28,433,000 92,729,000    53,246,000        106,891,000    -46,696,000   -100,674,000 82,253,000   95,531,000 165,758,000 189,163,000 120,822,000 -223,268,000 -36,202,000    3,463,000  272,035,000 -146,807,000 126,098,000       151,515,000 -311,811,000   
          short-term borrowing and payments — net
                              -226,975,000 260,900,000 -76,675,000  -369,998,000 191,323,000 172,650,000  -481,049,000 237,349,000 263,500,000  -356,600,000 265,703,000 22,097,000  53,160,000                                                     
          short-term debt borrowings
                              751,690,000                                                                  
          short-term debt repayments
                              -7,000,000 -532,000,000 -226,690,000  -5,000,000                                                                 
          common stock equity issuance - net of purchases
                              555,000 -524,000 -1,680,000  2,230,000 293,000 -2,653,000  310,000 534,000 -2,828,000  -78,000 2,788,000 -11,580,000  1,773,000 1,115,000 8,902,000                                                   
          common stock equity issuance and purchases - net
                                                                                                   
          proceeds from nuclear decommissioning trust sales
                                        130,456,000 190,386,000 76,496,000 124,238,000 151,126,000 185,991,000 156,825,000 148,785,000 141,809,000 148,509,000 104,525,000 110,497,000 115,282,000 86,919,000 70,052,000 96,067,000 103,157,000 82,081,000 109,948,000 118,756,000 135,240,000 122,477,000 83,988,000 119,091,000 92,047,000 92,143,000 106,037,000 110,282,000 189,318,000 136,214,000 94,459,000 171,348,000 158,448,000 70,843,000 125,541,000 115,042,000 129,816,000 61,913,000 67,395,000 121,134,000 67,177,000 56,012,000 69,551,000 69,973,000 63,490,000 83,824,000 55,952,000 81,132,000 33,743,000           
          investment in nuclear decommissioning trust
                                        -131,027,000 -191,526,000 -76,496,000 -124,809,000 -151,696,000 -186,562,000 -157,395,000 -149,355,000 -142,379,000 -152,574,000 -108,837,000 -115,057,000 -119,594,000 -91,232,000               -194,241,000 -142,318,000 -100,563,000 -177,452,000 -164,552,000 -76,290,000 -130,989,000 -120,490,000 -135,264,000 -67,098,000 -72,581,000 -126,320,000 -72,362,000 -61,198,000 -74,736,000 -75,159,000 -68,675,000   -86,317,000 -38,929,000           
          short-term borrowings under revolving credit facility
                                                                                                   
          short-term borrowings and payments — net
                                                261,800,000 -57,000,000 -100,500,000 113,000,000 -102,900,000 128,250,000 -157,500,000         -107,600,000 216,600,000    700,000 16,600,000 -4,616,000 -285,000,000 135,901,000  -248,246,000 -16,507,000 -263,464,000  175,096,000 -76,175,000 1,965,000          -36,228,000 24,031,000 -7,778,000       
          change in long-term income tax receivable
                                                                                                  
          common stock equity issuance
                                                  382,000 2,471,000 9,690,000 428,000 2,235,000 3,235,000 9,390,000 6,923,000 645,000 310,000 9,441,000 6,271,000 815,000 4,580,000 4,289,000 888,000 433,000 2,793,000 11,727,000 815,000 544,000 253,768,000 844,000 679,000 916,000 892,000 815,000 -4,478,000 2,603,000 2,747,000 2,815,000 5,463,000 696,000 10,317,000 7,613,000 14,974,000 15,664,000 3,845,000 5,065,000 7,626,000 19,473,000 258,420,000 12,649,000       
          distributions to noncontrolling interest
                                                                                                  
          net cash flow used for financing activities
                                                     73,335,000                                       -147,320,000       
          gain on sale of energy-related products and services business
                                                                                                   
          change in other regulatory liabilities
                                                                     14,397,000    18,044,000                          
          proceeds from sale of energy-related products and services business
                                                                                                  
          proceeds from sale of life insurance policies
                                                                                                 
          accrued taxes and income tax receivable — net
                                                           -34,150,000 39,182,000 -67,672,000 56,590,000 -17,623,000 37,398,000                                   
          gain on sale of district cooling business
                                                                                                 
          real estate impairment charges
                                                                                                  
          gain on real estate debt restructuring
                                                                     -2,352,000                              
          change in long term income tax receivable
                                                                                                   
          proceeds from sale of district cooling business
                                                                                                  
          proceeds from sale of commercial real estate investments
                                                                 275,000    864,000    12,523,000                        
          supplemental disclosure of cash flow information cash paid during the period for:
                                                                                                   
          income taxes, net of
                                                              -2,000 1,000 -650,000 4,648,000    -1,282,000 -18,221,000 1,603,000 -5,547,000 -18,076,000                          
          interest, net of amounts capitalized
                                                              57,902,000 31,788,000 62,892,000 54,539,000 52,591,000 54,662,000 55,997,000 54,152,000 51,854,000 57,043,000 58,679,000 50,135,000 62,878,000 44,807,000 46,040,000 54,089,000 43,262,000 47,785,000 45,949,000                   
          supplemental disclosure of cash flow information
                                                                                                   
          cash paid during the period for:
                                                                                                   
          change in mark-to-market valuations
                                                                1,985,000 2,203,000   -284,000 -1,028,000 1,320,000 554,000 1,842,000 -969,000 -5,569,000 -4,223,000 3,822,000 7,663,000 30,780,000 -14,660,000 -14,709,000 -1,328,000 16,583,000 7,818,000 -5,494,000 11,490,000 5,244,000 2,425,000 9,305,000 18,115,000 -12,349,000 1,121,000 -18,557,000 6,648,000 -27,976,000     
          accrued taxes and income tax receivable-net
                                                                  60,004,000 -23,414,000 52,944,000  -18,695,000 45,542,000 30,004,000                           
          expenditures for real estate investments
                                                                    -40,000 -108,000 -56,000 -15,000 -443,000 -547,000 -850,000 -101,000 -1,459,000 -3,771,000 -1,783,000                     
          gains and other changes in real estate assets
                                                                    -3,000  4,742,000 -7,026,000 4,095,000                           
          real estate impairment charge
                                                                        15,112,000 19,738,000 38,395,000 6,186,000 215,869,000                       
          other changes in real estate assets
                                                                           7,399,000 -264,000 -16,664,000 28,518,000                     
          proceeds from the sale of district cooling business
                                                                                                   
          noncontrolling interests
                                                                     -8,117,000                             
          trust fund for bond redemptions
                                                                                                   
          net cash flow used for operating activities
                                                                        -13,675,000                           
          capitalized interest
                                                                        -3,080,000 -2,177,000 -1,423,000 -3,311,000 -3,834,000 -4,227,000 -3,976,000 -4,938,000 -5,679,000 -7,608,000 -5,435,000 -5,213,000 -4,807,000 -6,395,000 -5,612,000 -4,959,000 -4,024,000 -1,884,000 -3,301,000 -3,544,000 -3,289,000 -2,774,000 -4,506,000 -4,120,000 -4,911,000 -5,383,000  
          repayment and reacquisition of long-term debt
                                                                        -4,150,000 -20,653,000 -218,707,000 -179,381,000 -16,386,000                       
          deferred fuel and purchased power regulatory disallowance
                                                                                                  
          accrued utility revenues
                                                                         45,538,000 -12,111,000 -59,674,000 15,365,000               -52,409,000 15,071,000 27,305,000 5,526,000 -36,711,000 -718,000   
          home inventory
                                                                                                   
          proceeds from sale of investment securities
                                                                                 69,225,000 870,025,000 256,152,000 11,001,000 269,526,000 463,790,000 1,248,343,000 1,006,648,000 424,700,000       
          purchases of investment securities
                                                                                 -36,525,000 -699,408,000 -459,469,000 -11,001,000 -269,526,000 -395,041,000 -987,331,000 -1,236,381,000 -343,525,000       
          short-term borrowings — net
                                                                                                   
          trust fund for bond redemption
                                                                                                   
          income taxes, net of refunds
                                                                           17,602,000 24,031,000 -10,607,000 949,000 9,860,000                   
          change in margin and collateral accounts – assets
                                                                                                   
          change in margin and collateral accounts – liabilities
                                                                                                   
          proceeds from the sale of silverhawk
                                                                                     207,620,000      -2,411,000     
          short-term borrowings – net
                                                                                                   
          change in margin and collateral accounts-assets
                                                                                                   
          change in margin and collateral accounts
                                                                                                   
          proceeds from the sale of real estate assets
                                                                                23,678,000 77,530,000 -14,817,000 2,984,000 16,824,000 7,846,000 11,662,000 7,598,000 7,884,000 1,198,000 -26,239,000 -12,561,000 53,820,000 42,776,000   8,607,000   
          real estate investments
                                                                                -10,967,000 -20,898,000 -26,721,000 -49,080,000 -24,617,000 -31,696,000 -32,775,000 -33,088,000 -28,670,000 -28,528,000 -19,559,000 -26,171,000 -13,797,000 -8,090,000 -18,204,000     
          change in risk management and trading — assets
                                                                                93,449,000                  13,649,000 
          change in risk management and trading — liabilities
                                                                                6,647,000                   
          silverhawk impairment loss
                                                                                         -32,000         
          regulatory disallowance
                                                                                         -4,655,000          
          deferred fuel and purchased power disallowance
                                                                                                   
          collateral
                                                                                 3,250,000 -1,400,000 -46,400,000 -303,000 10,282,000   -170,690,000           
          change in risk management and trading – liabilities
                                                                                 -491,000 -29,842,000 16,363,000 -480,000 -657,000 -92,000 -66,352,000 -66,096,000           
          changes in unrecognized tax benefits
                                                                                                   
          purchase of sundance plant
                                                                                                  
          proceeds from sale of real estate investments
                                                                                 24,524,000                  
          short-term borrowings and payments – net
                                                                                 67,053,000 133,264,000 69,294,000 35,300,000 -31,748,000   -70,000           
          income taxes paid, net of refunds
                                                                                 116,669,000 47,260,000 1,734,000 38,980,000 85,344,000   -40,000 34,278,000          
          interest paid, net of amounts capitalized
                                                                                 50,792,000 52,825,000 39,213,000 50,703,000 40,095,000   25,526,000 26,521,000 22,460,000 61,667,000 71,327,000 44,962,000 27,445,000 47,091,000 72,367,000   
          change in risk management and trading – assets
                                                                                   -43,660,000 54,689,000   -3,091,000 67,984,000           
          net cash flow provided by investing activities
                                                                                    -184,001,000    31,697,000           
          equity earnings in phoenix suns partnership
                                                                                                 
          change in pension and other postretirement liabilities
                                                                                                   
          proceeds from the sale of the phoenix suns partnership
                                                                                                   
          proceeds from the sale of real estate investments
                                                                                                   
          investment in nuclear decommissioning trusts
                                                                                                   
          change in collateral
                                                                                                   
          purchase of sundance
                                                                                                   
          deferred fuel amortization
                                                                                        17,808,000           
          proceeds from real estate investments
                                                                                        2,138,000 48,000          
          proceeds from sale of silverhawk
                                                                                                   
          adjustment to reconcile net income to net cash from operating activities:
                                                                                                   
          change in risk management and trading-assets
                                                                                                   
          change in risk management and trading-liabilities
                                                                                                   
          proceeds from the sale of 25% of silverhawk
                                                                                                   
          proceeds from sale of the phoenix suns partnership
                                                                                                   
          depreciation and amortization
                                                                                           87,763,000 94,231,000 98,186,000 97,174,000 104,241,000 101,504,000   
          deferred purchased power and fuel
                                                                                                   
          nuclear fuel amortization
                                                                                           1,518,000 2,101,000 7,053,000 8,892,000 6,902,000 7,599,000   
          accrued interest
                                                                                           -8,832,000 9,888,000 -10,852,000 11,264,000 -8,694,000 -4,748,000   
          change in risk management and trading activities — assets
                                                                                           17,558,000 -1,198,000       
          change in risk management and trading activities — liabilities
                                                                                           -32,104,000 37,707,000       
          change in pension liability
                                                                                           -8,645,000 15,883,000 14,824,000 -20,675,000 14,969,000 14,704,000 16,458,000  
          income taxes paid — net of refunds
                                                                                                   
          income from discontinued operations, net of tax
                                                                                            -792,000       
          increase in regulatory assets
                                                                                            -3,323,000 2,849,000 -209,000 -4,495,000 -847,000 -1,016,000  
          change in customer advances
                                                                                            2,189,000    3,070,000 3,189,000  
          discontinued operations — real estate
                                                                                            -2,785,000       
          discontinued operations — nac
                                                                                                   
          income taxes paid
                                                                                            15,230,000  9,257,000 533,000 6,767,000   
          loss from discontinued operations, net of tax
                                                                                                   
          cumulative effect of accounting change, net of tax
                                                                                                   
          redhawk units 3 and 4 cancellation charge
                                                                                                   
          cash flows from investing activities capital expenditures
                                                                                                   
          discontinued operations – real estate
                                                                                                   
          discontinued operations – nac
                                                                                                   
          proceeds from commercial real estate properties
                                                                                                   
          cash flows from financing activities issuance of long-term debt
                                                                                                   
          income taxes paid/
                                                                                                   
          income from discontinued operations
                                                                                                   
          increase in regulatory liabilities
                                                                                                   
          proceeds from sale of assets from discontinued operations
                                                                                              8,449,000 -16,000 133,000 3,095,000 -3,030,000 
          short-term borrowings and payments—net
                                                                                                149,005,000   
          supplemental disclosure of cash flow information:
                                                                                                   
          gain on sale of discontinued operations
                                                                                               -313,000 -388,000   
          other real estate activities
                                                                                                   
          change in risk management and trading - assets
                                                                                               6,527,000 5,875,000   
          change in risk management and trading - liabilities
                                                                                               -18,308,000 19,427,000   
          short-term borrowings and payments-net
                                                                                                   
          change in mark-to-market
                                                                                                -22,920,000   
          change in real estate investments
                                                                                                -11,573,000   
          income from continuing operations
                                                                                                  109,538,000 
          items not requiring cash:
                                                                                                   
          net cash flow
                                                                                                  107,562,000