7Baggers
Quarterly
Annual
    Unit: USD2025-09-30 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 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 
      
    		                                                                              
      assets
    		                                                                              
      current assets:
    		                                                                              
      cash, cash equivalents and restricted cash
    		75,853,000 58,801,000 59,541,000 66,904,000 104,016,000 94,438,000 89,296,000 76,975,000 32,493,000                                                                      
      receivables
    		132,240,000 156,728,000 269,246,000 274,303,000 934,473,000 926,804,000 932,146,000 942,782,000 893,019,000 934,173,000 1,291,949,000 1,305,642,000 1,298,019,000 1,184,116,000 948,024,000 946,741,000 979,862,000 903,831,000 784,582,000 873,986,000 1,009,433,000 920,824,000 835,468,000 836,605,000 968,279,000 890,579,000 722,152,000 722,945,000 787,344,000 743,687,000 664,319,000 727,030,000 739,402,000 661,771,000 554,185,000 630,243,000 665,142,000 637,166,000 537,744,000 590,105,000 677,928,000 627,169,000 564,090,000 693,318,000 784,028,000 731,247,000 690,761,000 713,067,000 787,311,000 734,765,000 635,564,000 678,123,000 743,274,000 654,609,000 539,589,000 646,251,000 641,389,000 566,366,000 533,279,000 583,743,000 585,487,000 502,454,000 467,790,000 531,980,000 519,572,000 559,842,000 580,700,000 769,379,000 697,079,000 715,484,000 748,858,000 642,559,000 548,542,000 721,770,000 651,192,000 547,997,000 603,959,000 632,207,000 
      current regulatory assets
    		179,149,000 141,744,000 143,341,000 215,436,000 241,008,000 217,822,000 158,614,000 172,492,000 169,248,000 193,162,000 216,318,000 165,092,000 148,160,000 102,535,000 89,078,000 118,691,000 133,135,000 109,581,000 98,452,000 68,527,000 79,125,000 60,557,000 55,206,000                                                        
      inventories
    		44,272,000 19,713,000 18,457,000 44,940,000 91,889,000 69,736,000 57,429,000 87,392,000 80,235,000 60,154,000 425,834,000 387,525,000 398,642,000 401,433,000 380,316,000 335,609,000 312,285,000 316,328,000 316,737,000 291,167,000 286,223,000 302,837,000 305,958,000 278,407,000 286,057,000 325,944,000 311,535,000 287,309,000 270,293,000 278,239,000 257,792,000 226,583,000 232,555,000 249,870,000 250,609,000 238,273,000 245,790,000 265,849,000 276,812,000 253,727,000 258,341,000 314,405,000 336,598,000 300,811,000 302,705,000 331,422,000 301,332,000 282,391,000 314,571,000 345,885,000 334,872,000 317,415,000 315,767,000 333,392,000 313,341,000 274,205,000 269,569,000 277,327,000 262,696,000 252,897,000 261,680,000 260,163,000 253,931,000 249,804,000 268,677,000 285,814,000 276,268,000 267,125,000 227,017,000 229,255,000 254,710,000 221,179,000 206,250,000 226,398,000 207,746,000 172,481,000 172,201,000 193,934,000 
      prepayments and other current assets
    		69,853,000 64,940,000 50,966,000 64,676,000 96,434,000 88,239,000 82,459,000 84,082,000 63,805,000 60,502,000 81,424,000 72,972,000 104,850,000 105,753,000 89,586,000 95,741,000 83,364,000 74,259,000 68,409,000 44,120,000 61,706,000 48,194,000 60,230,000 115,805,000 140,053,000 155,893,000 151,391,000 119,500,000 88,760,000 52,035,000 59,481,000 81,304,000 89,625,000 63,953,000 79,254,000 48,461,000 49,081,000 50,309,000 57,821,000 35,189,000 56,604,000 81,355,000 98,503,000 76,848,000 72,900,000 93,980,000 99,229,000 49,510,000 56,257,000 58,870,000 68,828,000 42,351,000 71,579,000 85,729,000 64,897,000 43,316,000 48,851,000 71,604,000 73,556,000 60,441,000 99,466,000 97,953,000 104,437,000 66,021,000 77,736,000 117,381,000 135,734,000 175,293,000 114,935,000 64,998,000 129,421,000 95,235,000 96,766,000 80,545,000 93,203,000 72,961,000 40,539,000 42,100,000 
      current assets of discontinued operations
    		                                                                              
      total current assets
    		501,367,000 441,926,000 541,551,000 666,259,000 1,467,820,000 1,397,039,000 1,319,944,000 1,363,723,000 1,515,013,000 1,544,834,000 2,108,714,000 2,011,748,000 2,024,291,000 1,859,231,000 1,571,908,000 1,550,943,000 1,565,887,000 1,461,945,000 1,323,274,000 1,337,347,000 1,502,557,000 1,396,770,000 1,373,388,000 1,297,701,000 1,461,815,000 1,444,810,000 1,235,229,000 1,184,132,000 1,214,045,000 1,116,192,000 1,040,814,000 1,069,995,000 1,099,242,000 1,015,970,000 942,073,000 977,475,000 1,144,625,000 1,157,503,000 1,054,936,000 1,021,042,000 1,196,644,000 1,282,764,000 1,161,546,000 1,194,973,000 1,417,672,000 1,276,206,000 1,204,530,000 1,116,688,000 1,254,970,000 1,292,247,000 1,149,234,000 1,128,081,000 1,249,400,000 1,233,824,000 1,078,153,000 1,194,638,000 1,132,018,000 1,071,031,000 1,064,003,000 1,167,168,000 1,035,523,000 969,299,000 989,761,000 1,061,658,000 970,549,000 1,063,852,000             
      noncurrent assets:
    		                                                                              
      property, plant and equipment
    		7,863,725,000 7,711,004,000 7,617,007,000 7,554,063,000 7,703,249,000 7,560,455,000 7,441,589,000 7,341,116,000 7,211,680,000 7,083,229,000 9,475,608,000 9,364,038,000 9,257,067,000 9,099,752,000 8,958,600,000 8,972,849,000 8,634,737,000 8,417,559,000 8,288,879,000 8,300,770,000 8,203,751,000 8,063,435,000 8,008,338,000 7,908,628,000 7,746,754,000 7,625,654,000 7,502,368,000 7,397,321,000 7,102,960,000 6,975,919,000 6,842,967,000 6,770,829,000 6,658,891,000 6,591,382,000 6,544,077,000 6,510,229,000 6,588,445,000 6,526,563,000 6,878,595,000 6,817,668,000 6,627,269,000 6,556,058,000 9,299,713,000 9,693,171,000 9,438,609,000 9,390,538,000 9,150,269,000 8,803,866,000 8,651,334,000 8,454,204,000 8,303,065,000 8,107,751,000 8,129,872,000 8,068,177,000 7,798,770,000 7,646,222,000 7,506,833,000 7,394,616,000 7,271,173,000 7,218,503,000 7,163,515,000 7,085,632,000 6,875,397,000 6,766,582,000 6,698,227,000 6,651,088,000 6,550,825,000 6,507,164,000 6,303,570,000 5,930,246,000 5,740,966,000 4,953,171,000 4,850,268,000 5,044,720,000 4,925,546,000 4,702,848,000 4,594,355,000 4,397,510,000 
      less accumulated depreciation and amortization
    		2,272,380,000 2,276,447,000 2,238,371,000 2,209,771,000 2,322,543,000 2,295,499,000 2,262,789,000 2,220,206,000                                                                       
      net property, plant and equipment
    		5,591,345,000 5,434,557,000 5,378,636,000 5,344,292,000 5,380,706,000 5,264,956,000 5,178,800,000 5,120,910,000 5,020,166,000 4,922,790,000 6,152,714,000 6,091,545,000 5,993,850,000 5,888,812,000 5,800,509,000 5,756,388,000 5,458,981,000 5,287,842,000 5,192,508,000 5,166,939,000 5,087,946,000 4,998,602,000 4,968,526,000 4,917,142,000 4,801,826,000 4,722,380,000 4,643,382,000 4,578,677,000 4,306,311,000 4,217,756,000 4,117,483,000 4,079,188,000 3,991,129,000 3,953,284,000 3,934,774,000 3,931,327,000 4,004,879,000 3,974,622,000 4,334,653,000 4,311,097,000 4,171,867,000 4,111,924,000 5,066,520,000 5,526,764,000 5,346,592,000 5,378,680,000 5,195,827,000 4,931,379,000 4,855,282,000 4,744,525,000 4,624,530,000 4,498,839,000 4,582,945,000 4,590,059,000 4,379,196,000 4,285,014,000 4,199,400,000 4,158,199,000 4,096,519,000 4,115,180,000 4,107,388,000 4,084,969,000 3,939,944,000 3,894,117,000 3,874,831,000 3,744,264,000             
      goodwill
    		345,736,000 345,736,000 345,736,000 345,736,000 488,960,000 488,960,000 488,960,000 488,960,000 488,960,000 488,960,000 763,500,000 763,500,000 763,262,000 763,262,000 763,262,000 765,386,000 717,646,000 717,863,000 714,963,000 714,963,000 712,677,000 708,664,000 713,527,000 681,358,000 681,349,000 679,395,000 679,395,000 664,922,000 640,203,000 642,374,000 631,791,000 631,791,000 631,791,000 631,791,000 631,791,000 631,791,000 641,527,000 641,527,000 641,527,000 635,204,000 635,204,000 635,204,000 635,204,000 635,204,000 636,039,000 636,039,000 636,039,000 636,039,000 636,039,000 636,039,000 636,039,000 636,039,000 636,039,000 635,389,000 635,389,000 634,931,000 634,931,000 634,931,000 634,931,000 634,633,000 634,633,000 634,654,000 634,633,000 629,463,000 629,036,000 622,131,000 621,566,000 437,832,000 430,309,000 425,698,000 430,644,000 227,029,000 226,937,000 237,839,000 242,955,000 230,439,000 230,865,000 214,939,000 
      regulatory assets
    		305,890,000 309,302,000 312,008,000 322,350,000 343,578,000 351,334,000 414,433,000 447,099,000 428,969,000 345,185,000 349,500,000 329,659,000 344,442,000 347,061,000 359,228,000 357,851,000 379,245,000 376,913,000 379,917,000 379,381,000 369,764,000 351,025,000 348,189,000                                                        
      investments
    		118,443,000 115,784,000 117,599,000 115,459,000 130,602,000 123,391,000 119,396,000 124,235,000 139,327,000 139,569,000 172,467,000 161,913,000 157,860,000 161,247,000 174,555,000 175,476,000 171,859,000 173,157,000 167,741,000 165,022,000 158,440,000 154,779,000 145,237,000 148,656,000 144,417,000 145,746,000 144,616,000 138,620,000 143,303,000 140,053,000 138,451,000 137,613,000 133,895,000 131,726,000 129,009,000 125,866,000 126,048,000 124,531,000 121,955,000 119,704,000 118,063,000 119,446,000 118,407,000 117,920,000 115,656,000 116,594,000 113,763,000 112,939,000 108,664,000 106,508,000 106,846,000 103,243,000 102,139,000 99,343,000 113,799,000 109,424,000 109,249,000 116,368,000 117,015,000 103,661,000 152,577,000 142,212,000 141,443,000 145,416,000 137,340,000 125,361,000 114,058,000 121,279,000 113,286,000 118,602,000 112,283,000 136,585,000 133,454,000 155,989,000 106,226,000 103,404,000 98,217,000 100,954,000 
      other
    		322,959,000 298,612,000 265,944,000 244,722,000 270,078,000 250,507,000 240,633,000 211,865,000 198,459,000 165,910,000 161,306,000 165,509,000 185,094,000 173,670,000 160,019,000 157,675,000 143,565,000 144,653,000 150,248,000 144,111,000 147,205,000 154,026,000 153,017,000 506,207,000 504,842,000 466,957,000 455,048,000 408,857,000 408,178,000 409,407,000 412,456,000 407,850,000 419,846,000 416,759,000 409,745,000 415,419,000 360,537,000 360,520,000 359,977,000 366,485,000 355,720,000 362,407,000 326,542,000 325,277,000 247,539,000 249,532,000 246,394,000 251,188,000 298,061,000 297,040,000 295,215,000 299,160,000 314,133,000 324,299,000 312,103,000 311,275,000 262,107,000 253,515,000 254,472,000 257,636,000 260,722,000 255,473,000 249,454,000 231,321,000 230,632,000 242,436,000 254,240,000 166,019,000 149,752,000 146,455,000 152,607,000 113,193,000 107,639,000 104,402,000 103,141,000 112,110,000 92,332,000 90,256,000 
      noncurrent assets of discontinued operations
    		                                                                              
      total noncurrent assets
    		6,684,373,000 6,503,991,000 6,419,923,000 6,372,559,000 6,704,829,000 6,563,297,000 6,519,927,000 6,469,436,000 6,354,136,000 6,140,016,000 7,733,873,000 7,649,033,000 7,582,839,000 7,469,894,000 7,398,807,000 7,359,492,000 7,002,976,000 6,836,266,000 6,746,001,000 6,716,025,000 6,622,942,000 6,514,362,000 6,477,128,000                                                        
      total assets
    		7,185,740,000 6,945,917,000 6,961,474,000 7,038,818,000 8,172,649,000 7,960,336,000 7,839,871,000 7,833,159,000 7,869,149,000 7,684,850,000 9,842,587,000 9,660,781,000 9,607,130,000 9,329,125,000 8,970,715,000 8,910,435,000 8,568,863,000 8,298,211,000 8,069,275,000 8,053,372,000 8,125,499,000 7,911,132,000 7,850,516,000 7,683,059,000 7,730,611,000 7,591,493,000 7,278,923,000 6,988,110,000 6,718,193,000 6,533,970,000 6,348,852,000 6,334,666,000 6,344,445,000 6,230,498,000 6,148,458,000 6,284,467,000 6,353,206,000 6,389,584,000 6,618,400,000 6,627,608,000 6,985,319,000 7,270,055,000 7,317,385,000 7,809,978,000 7,774,094,000 7,668,317,000 7,408,849,000 7,061,332,000 7,167,108,000 7,091,671,000 6,828,182,000 6,682,491,000 6,902,671,000 6,901,570,000 6,538,631,000 6,556,125,000 6,359,953,000 6,257,381,000 6,191,291,000 6,303,549,000 6,216,955,000 6,112,806,000 5,981,847,000 5,990,952,000 5,872,572,000 5,823,364,000             
      liabilities and stockholders' equity
    		                                                                              
      current liabilities:
    		                                                                              
      long-term debt due within one year
    		164,700,000 136,700,000 161,700,000 161,700,000 218,777,000 193,608,000 60,700,000 61,319,000 61,319,000 1,319,000 78,031,000 78,031,000 214,453,000 214,453,000 147,953,000 148,053,000 1,548,000 1,549,000 1,552,000 1,555,000 1,558,000 16,560,000 16,560,000 16,540,000 65,810,000 51,822,000 251,846,000 251,854,000 3,915,000 109,199,000 149,199,000 148,499,000 148,499,000 83,499,000 43,499,000 43,598,000 93,598,000 58,598,000 104,915,000 243,789,000 262,664,000 418,539,000 409,292,000 269,449,000 149,101,000 42,215,000 12,227,000 12,277,000 44,024,000 69,091,000 171,094,000 134,108,000 240,564,000 282,199,000 202,215,000 139,267,000 76,600,000 62,571,000 12,785,000 72,797,000 73,417,000 72,551,000 72,572,000 12,629,000 27,790,000 27,879,000 28,621,000 87,366,000 211,669,000 161,682,000 131,971,000 131,661,000 83,446,000 98,980,000 159,168,000 101,707,000 101,758,000 86,802,000 
      accounts payable
    		122,109,000 107,178,000 109,133,000 150,070,000 489,100,000 442,568,000 420,168,000 475,215,000 414,479,000 399,339,000 547,188,000 657,168,000 630,699,000 579,064,000 449,746,000 478,933,000 525,704,000 431,878,000 379,348,000 426,264,000 436,718,000 433,362,000 384,339,000 403,391,000 378,370,000 356,059,000 352,180,000 358,505,000 339,713,000 330,926,000 267,994,000 312,327,000 304,101,000 279,211,000 239,013,000 279,962,000 281,373,000 275,791,000 260,432,000 310,466,000 292,612,000 272,988,000 259,881,000 382,671,000 410,382,000 424,201,000 399,935,000 404,961,000 437,740,000 411,621,000 375,942,000 388,015,000 402,241,000 379,840,000 321,369,000 337,228,000 305,695,000 304,049,000 267,922,000 301,132,000 299,094,000 266,069,000 241,465,000 281,906,000 267,320,000 332,957,000 355,951,000 396,715,000 333,894,000 369,235,000 310,509,000 284,208,000 244,059,000 319,415,000 294,951,000 231,374,000 269,021,000 300,509,000 
      regulatory liabilities due within one year
    		143,822,000 134,254,000 140,165,000 137,167,000 157,068,000 158,535,000 90,115,000 70,761,000 45,013,000 48,057,000 44,395,000 26,440,000 18,599,000 17,884,000 31,186,000 16,303,000 16,491,000 23,454,000 34,266,000 31,450,000 39,837,000 48,000,000 60,072,000                                                        
      taxes payable
    		43,328,000 53,428,000 65,218,000 43,372,000 61,879,000 63,029,000 81,972,000 58,110,000 49,500,000 60,284,000 73,914,000 70,810,000 93,565,000 84,970,000 90,572,000 80,372,000 87,455,000 78,805,000 88,711,000 88,844,000 96,708,000 80,882,000 58,743,000 48,970,000 53,505,000 46,731,000 55,319,000 41,929,000 50,461,000 47,803,000 57,354,000 42,537,000 108,946,000 55,037,000 74,638,000 48,164,000 59,747,000 45,749,000 50,222,000 45,775,000 44,267,000 38,966,000 48,436,000 45,631,000 105,027,000 48,985,000 61,847,000 74,175,000 80,392,000 89,896,000 55,748,000 46,475,000 54,903,000 46,919,000 51,019,000 70,176,000 77,190,000 45,065,000 49,852,000 56,186,000 46,928,000 39,976,000 69,077,000 55,540,000 64,656,000 42,151,000 71,238,000 46,200,000 85,366,000 60,407,000 114,427,000 38,769,000 67,223,000 46,633,000 31,919,000 61,592,000 50,533,000 75,263,000 
      dividends payable
    		28,606,000 26,563,000 26,563,000 26,511,000 26,024,000 25,029,000 25,044,000 25,461,000 25,455,000 45,310,000 45,306,000 45,245,000 44,229,000 44,229,000 44,229,000 44,229,000 43,212,000 42,791,000 42,740,000 42,611,000 41,608,000 41,608,000 41,608,000 41,580,000 40,460,000 40,225,000 39,875,000 39,695,000 38,714,000 38,714,000 38,573,000 38,573,000 37,596,000 37,596,000 37,767,000 37,767,000 36,791,000 36,791,000 36,791,000 36,784,000 35,807,000 35,734,000 35,687,000 35,607,000 34,607,000 34,388,000 33,980,000 33,737,000 32,745,000 32,745,000 32,744,000 171,000 31,800,000 31,800,000 31,800,000 31,794,000 30,850,000 30,850,000 30,850,000 30,773,000 29,810,000 29,802,000 29,796,000 29,749,000 29,012,000 28,686,000 28,685,000 26,723,000 26,677,000 26,619,000 26,616,000 24,725,000 24,693,000 24,569,000 22,967,000 22,964,000 22,951,000 22,935,000 
      accrued compensation
    		31,628,000 20,795,000 18,175,000 35,264,000 97,041,000 63,927,000 47,394,000 85,512,000 94,230,000 66,555,000 65,509,000 88,662,000 99,824,000 98,159,000 64,796,000 81,904,000 105,867,000 95,909,000 69,612,000 90,629,000 110,730,000 85,525,000 55,199,000 99,269,000 93,642,000 71,508,000 45,383,000 69,007,000 62,836,000 53,933,000 35,087,000 72,919,000 67,097,000 52,951,000 32,350,000 65,867,000 58,604,000 56,390,000 41,137,000 46,130,000 60,277,000 48,420,000 37,797,000 62,775,000 66,119,000 50,024,000 40,016,000 69,661,000 62,746,000 44,159,000 31,382,000 48,448,000 48,792,000 37,774,000 28,463,000 47,804,000 44,100,000 37,978,000 25,774,000 40,121,000 41,648,000 35,989,000 22,607,000 47,425,000 49,082,000 44,141,000 35,543,000 55,631,000 40,470,000 66,255,000         
      other accrued liabilities
    		132,356,000 115,873,000 113,622,000 124,514,000 203,353,000 178,566,000 174,296,000 181,471,000 154,147,000 143,235,000 245,511,000 232,231,000 232,364,000 208,290,000 203,670,000 207,078,000 212,140,000 188,187,000 201,246,000 198,514,000 226,863,000 182,597,000 172,561,000 221,502,000 225,925,000 218,442,000 213,541,000 221,059,000 221,620,000 208,696,000 204,328,000 186,010,000 184,580,000 181,030,000 188,373,000 184,377,000 191,904,000 196,701,000 189,275,000 171,592,000 157,650,000 164,675,000 179,672,000 172,561,000 173,247,000 179,402,000 185,287,000 171,106,000 171,420,000 185,389,000 205,394,000 204,698,000 233,773,000 244,922,000 255,172,000 259,320,000 226,986,000 224,220,000 227,088,000 222,639,000 205,777,000 172,446,000 187,368,000 192,729,000 162,200,000 158,661,000 162,271,000 295,153,000 226,782,000 163,990,000 266,149,000 155,890,000 143,045,000 166,582,000 157,438,000 139,900,000 184,665,000 255,355,000 
      current liabilities of discontinued operations
    		                                                                              
      total current liabilities
    		666,549,000 594,791,000 634,576,000 678,598,000 1,281,375,000 1,149,859,000 922,823,000 1,075,733,000 1,173,655,000 1,131,765,000 1,636,329,000 1,479,603,000 1,468,302,000 1,380,675,000 1,166,728,000 1,092,240,000 1,072,919,000 944,360,000 900,037,000 963,522,000 1,066,990,000 999,719,000 824,479,000 866,427,000 1,033,677,000 912,602,000 1,062,779,000 986,050,000 725,218,000 800,984,000 764,261,000 812,858,000 856,568,000 693,805,000 618,034,000 669,659,000 744,202,000 702,377,000 761,467,000 947,639,000 941,678,000 1,080,265,000 986,865,000 968,694,000 938,527,000 796,664,000 745,478,000 784,900,000 845,807,000 865,889,000 917,183,000 850,115,000 1,025,145,000 1,024,491,000 910,221,000 898,753,000 764,449,000 723,419,000 654,770,000 768,076,000 727,177,000 640,693,000 662,913,000 667,185,000 644,963,000 691,614,000             
      noncurrent liabilities:
    		                                                                              
      long-term debt
    		2,188,485,000 2,045,235,000 2,031,976,000 2,130,910,000 2,233,520,000 2,207,009,000 2,325,697,000 2,236,904,000 2,279,828,000 2,246,103,000 2,769,037,000 2,763,394,000 2,773,999,000 2,713,514,000 2,599,810,000 2,593,847,000 2,326,718,000 2,335,500,000 2,251,722,000 2,211,575,000 2,268,732,000 2,265,316,000 2,438,675,000 2,226,567,000 2,180,946,000 2,327,984,000 1,946,181,000 1,856,841,000 1,911,555,000 1,743,711,000 1,630,343,000 1,566,354,000 1,592,053,000 1,677,977,000 1,659,507,000 1,746,561,000 1,808,350,000 1,928,709,000 1,822,139,000 1,627,443,000 2,012,441,000 1,958,263,000 1,780,694,000 1,825,278,000 2,061,456,000 2,144,879,000 2,093,605,000 1,842,286,000 1,967,872,000 1,937,663,000 1,618,569,000 1,610,867,000 1,502,413,000 1,383,432,000 1,213,974,000 1,285,411,000 1,347,014,000 1,369,534,000 1,414,077,000 1,433,955,000 1,437,171,000 1,508,714,000 1,426,146,000 1,486,677,000 1,471,833,000 1,636,592,000 1,614,786,000 1,474,908,000 1,269,963,000 1,146,781,000 1,146,708,000 1,224,286,000 1,155,117,000 1,307,050,000 1,299,175,000 1,134,889,000 1,104,752,000 1,047,245,000 
      deferred income taxes
    		434,099,000 426,556,000 429,825,000 441,320,000 453,155,000 454,826,000 461,808,000 458,548,000 526,654,000 515,661,000 642,069,000 631,303,000 617,996,000 597,733,000 587,940,000 591,962,000 557,582,000 538,633,000 528,551,000 516,098,000 533,524,000 516,760,000 515,711,000 506,583,000 487,194,000 457,588,000 444,965,000 430,085,000 405,761,000 362,896,000 346,218,000 347,271,000 652,413,000 668,239,000 666,905,000 668,226,000 31,378,000 33,938,000 33,868,000 32,849,000 32,009,000 38,171,000 32,987,000 23,806,000 13,041,000 29,110,000 29,427,000 25,048,000 26,284,000 27,959,000 29,885,000 22,846,000 25,345,000 21,451,000 42,239,000 40,407,000 14,713,000 33,732,000 45,206,000 32,890,000 25,552,000 17,755,000 18,543,000 28,145,000 13,050,000 2,490,000 10,143,000 47,442,000 27,897,000 7,046,000 3,069,000 1,396,000 2,702,000 8,698,000 11,637,000 10,286,000 9,062,000 3,416,000 
      regulatory liabilities
    		473,812,000 468,168,000 463,879,000 459,170,000 463,790,000 461,366,000 523,484,000 521,050,000 495,112,000 455,877,000 454,669,000 448,454,000 433,212,000 433,019,000 433,628,000 428,790,000 426,141,000 428,467,000 429,060,000 428,075,000 434,936,000 438,652,000 443,205,000                                                        
      asset retirement obligations
    		419,616,000 415,137,000 410,715,000 406,351,000 397,952,000 393,743,000 388,451,000 384,371,000 384,083,000 380,058,000 409,547,000 405,885,000 472,931,000 467,995,000 463,080,000 458,061,000 455,522,000 450,620,000 445,170,000 440,356,000 425,567,000 422,169,000 417,469,000                                                        
      noncurrent liabilities of discontinued operations
    		                                                                              
      total noncurrent liabilities
    		3,796,097,000 3,619,222,000 3,583,762,000 3,669,646,000 3,833,289,000 3,792,673,000 3,936,107,000 3,852,193,000 3,938,060,000 3,846,892,000 4,630,876,000 4,594,049,000 4,646,970,000 4,561,640,000 4,443,269,000 4,435,321,000 4,163,666,000 4,155,049,000 4,068,932,000 4,010,745,000 4,045,744,000 4,013,726,000 4,189,445,000                                                        
      commitments and contingencies
    		                                                                              
      stockholders' equity:
    		                                                                              
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 204,331,170 at september 30, 2025, 203,888,237 atseptember 30, 2024 and 203,934,578 at december 31, 2024
    		204,331,000                                                                              
      other paid-in capital
    		1,473,739,000 1,472,150,000 1,470,512,000 1,473,738,000 1,470,429,000 1,468,483,000 1,466,551,000 1,466,235,000 1,462,939,000 1,460,735,000 1,461,294,000 1,466,037,000 1,455,241,000 1,454,131,000 1,451,464,000 1,461,205,000 1,458,208,000 1,422,169,000 1,382,158,000 1,371,385,000 1,366,494,000 1,363,182,000 1,360,564,000 1,355,404,000 1,351,990,000 1,315,511,000 1,284,060,000 1,248,576,000 1,247,151,000 1,245,858,000 1,227,285,000 1,233,412,000 1,232,766,000 1,231,892,000 1,231,171,000 1,232,478,000 1,231,396,000 1,230,342,000 1,229,431,000 1,230,119,000 1,228,875,000 1,220,615,000 1,214,867,000 1,207,188,000 1,200,591,000 1,186,900,000 1,110,221,000 1,056,996,000 1,041,787,000 1,040,379,000 1,038,970,000 1,039,080,000 1,038,066,000 1,036,935,000 1,035,800,000 1,035,739,000 1,034,411,000 1,033,366,000 1,032,040,000 1,026,349,000 1,022,469,000 1,020,206,000 1,018,441,000 1,015,678,000 1,001,313,000 941,773,000 940,369,000 925,784,000 917,159,000 912,806,000 909,805,000 895,838,000 891,990,000 872,973,000 856,366,000 913,026,000 909,006,000 901,302,000 
      retained earnings
    		1,061,407,000 1,071,909,000 1,084,899,000 1,029,699,000 1,401,555,000 1,363,604,000 1,328,812,000 1,253,693,000 1,108,616,000 1,059,517,000 1,943,917,000 1,951,138,000 1,879,600,000 1,775,947,000 1,749,726,000 1,762,410,000 1,720,232,000 1,624,405,000 1,567,551,000 1,558,363,000 1,489,085,000 1,377,879,000 1,319,988,000 1,336,647,000 1,283,044,000 1,185,967,000 1,164,509,000 1,163,602,000 1,124,830,000 1,056,424,000 1,051,469,000 1,040,748,000 964,275,000 914,632,000 911,702,000 912,282,000 884,339,000 838,257,000 984,315,000 996,355,000 980,421,000 1,155,777,000 1,421,220,000 1,762,827,000 1,713,774,000 1,645,291,000 1,625,692,000 1,603,130,000 1,546,000,000 1,494,419,000 1,480,784,000 1,457,146,000 1,550,569,000 1,612,169,000 1,589,985,000 1,586,123,000 1,556,550,000 1,523,546,000 1,509,449,000 1,497,439,000 1,439,050,000 1,407,950,000 1,388,914,000 1,377,039,000 1,334,255,000 1,270,778,000 1,244,248,000 1,567,035,000 1,478,327,000 1,433,585,000 1,365,497,000 1,190,935,000 1,126,270,000 1,046,933,000 963,194,000 914,899,000 884,795,000 834,567,000 
      accumulated other comprehensive loss
    		-16,383,000 -16,486,000 -16,606,000 -16,798,000 -17,887,000 -18,171,000 -18,310,000 -18,384,000 -17,759,000 -17,697,000 -30,366,000 -30,583,000 -43,246,000 -43,531,000 -40,735,000 -41,004,000 -46,425,000 -46,968,000 -47,510,000 -48,078,000 -40,249,000 -40,809,000           -35,341,000 -35,789,000 -36,185,000  -37,891,000 -38,206,000 -38,582,000   -40,246,000 -40,924,000  -37,032,000 -37,198,000 -37,538,000  -56,937,000 -56,821,000 -56,615,000  -46,448,000 -29,575,000 -52,930,000   -32,268,000  -31,261,000        -97,292,000 -48,855,000 -9,393,000  -8,893,000 -19,797,000  -1,000,000 -3,645,000 -33,816,000 -81,421,000 
      total stockholders' equity
    		2,723,094,000 2,731,904,000 2,743,136,000 2,690,574,000 3,057,985,000 3,017,804,000 2,980,941,000 2,905,233,000 2,757,434,000 2,706,193,000 3,575,382,000 3,587,129,000 3,491,858,000 3,386,810,000 3,360,718,000 3,382,874,000 3,332,278,000 3,198,802,000 3,100,306,000 3,079,105,000 3,012,765,000 2,897,687,000 2,836,592,000 2,847,246,000 2,795,606,000 2,660,301,000 2,605,692,000 2,566,775,000 2,521,293,000 2,451,078,000 2,426,111,000 2,429,043,000 2,353,917,000 2,302,952,000 2,313,905,000 2,316,244,000 2,285,061,000 2,237,610,000 2,382,381,000 2,396,505,000 2,376,631,000 2,542,931,000 2,801,728,000 3,134,041,000 3,083,255,000 3,000,506,000 2,901,588,000 2,823,164,000 2,731,593,000 2,678,720,000 2,663,882,000 2,648,248,000 2,742,930,000 2,820,272,000 2,773,598,000 2,775,567,000 2,791,079,000 2,725,350,000 2,689,083,000 2,692,802,000    2,571,647,000      2,531,319,000         
      total liabilities and stockholders' equity
    		7,185,740,000 6,945,917,000 6,961,474,000 7,038,818,000 8,172,649,000 7,960,336,000 7,839,871,000 7,833,159,000 7,869,149,000 7,684,850,000 9,842,587,000 9,660,781,000 9,607,130,000 9,329,125,000 8,970,715,000 8,910,435,000 8,568,863,000 8,298,211,000 8,069,275,000 8,053,372,000 8,125,499,000 7,911,132,000 7,850,516,000 7,683,059,000 7,730,611,000 7,591,493,000 7,278,923,000 6,988,110,000 6,718,193,000 6,533,970,000 6,348,852,000 6,334,666,000 6,344,445,000 6,230,498,000                  6,682,491,000 6,902,671,000 6,901,570,000 6,538,631,000 6,556,125,000 6,359,953,000 6,257,381,000 6,191,291,000 6,303,549,000                   
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 204,331,170 at june 30, 2025, 203,888,237 atjune 30, 2024 and 203,934,578 at december 31, 2024
    		 204,331,000                                                                             
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 204,331,170 at march 31, 2025, 203,888,237 atmarch 31, 2024 and 203,934,578 at december 31, 2024
    		  204,331,000                                                                            
      short-term borrowings
    		       95,000,000 306,400,000 345,000,000 501,500,000 246,500,000 100,000,000 100,000,000 99,958,000  50,000,000 50,000,000 50,000,000 50,000,000 75,000,000 75,000,000   139,988,000 89,983,000 70,000,000            61,525,000 45,500,000 29,500,000 26,000,000 16,100,000     11,500,000 7,000,000 31,600,000 37,500,000 28,200,000 11,000,000       20,000,000 4,700,000 3,700,000 7,700,000 10,300,000   25,500,000 79,960,000  1,700,000         
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,934,578 at december 31, 2024 and 203,689,090 at december 31, 2023
    		   203,935,000                                                                           
      retained shares in knife river
    		                                                                              
      other intangible assets
    		    466,000 960,000 1,482,000 2,004,000 2,526,000 3,049,000 16,334,000 17,532,000 18,745,000 20,040,000 21,389,000 22,578,000 22,241,000 23,401,000 23,961,000 25,496,000 26,376,000 31,515,000 34,250,000 15,246,000 15,511,000 11,323,000 11,680,000 10,815,000 4,318,000 4,190,000 3,465,000 3,837,000 4,209,000 4,785,000 5,347,000 5,925,000 6,529,000 7,160,000 7,803,000 7,342,000 7,908,000 8,506,000 9,166,000 9,840,000 10,596,000 11,266,000 12,296,000 13,099,000 14,092,000 15,312,000 16,318,000 17,129,000 18,015,000 18,656,000 19,991,000 20,843,000 22,248,000 23,337,000 24,351,000 25,271,000 26,112,000 26,199,000 26,612,000 28,977,000 30,184,000 25,320,000 26,573,000 32,485,000 25,562,000 27,792,000 29,115,000 17,150,000 17,929,000 29,850,000 25,550,000 17,869,000 19,059,000 28,487,000 
      operating lease right-of-use assets
    		    90,439,000 83,189,000 76,223,000 74,363,000 75,729,000 74,553,000 118,052,000 119,375,000 119,586,000 115,802,000 119,845,000 124,138,000 109,439,000 112,437,000 116,663,000 120,113,000 120,534,000 115,751,000 114,382,000 115,323,000 118,764,000 118,795,000 107,486,000                                                    
      operating lease liabilities due within one year
    		    28,133,000 24,597,000 23,134,000 22,884,000 23,112,000 22,666,000 34,975,000 34,516,000 34,569,000 33,626,000 34,618,000 35,368,000 30,502,000 31,787,000 32,562,000 33,655,000 33,770,000 31,985,000 31,141,000                                                        
      operating lease liabilities
    		    62,569,000 58,826,000 53,204,000 51,645,000 52,908,000 52,328,000 83,632,000 85,534,000 85,884,000 82,891,000 85,874,000 89,253,000 79,397,000 81,052,000 84,494,000 86,868,000 87,140,000 84,302,000 83,414,000                                                        
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,888,237 at september 30, 2024, 203,638,373 atseptember 30, 2023 and 203,689,090 at december 31, 2023
    		    203,888,000                                                                          
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,888,237 at june 30, 2024, 203,638,373 atjune 30, 2023 and 203,689,090 at december 31, 2023
    		     203,888,000                                                                         
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,888,237 at march 31, 2024, 204,162,814 atmarch 31, 2023 and 203,689,090 at december 31, 2023
    		      203,888,000                                                                        
      treasury stock
    		          -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000           -3,626,000 -3,626,000 -3,626,000  -3,626,000 -3,626,000 -3,626,000   -3,626,000 -3,626,000  -3,626,000 -3,626,000 -3,626,000  -3,626,000 -3,626,000 -3,626,000  -3,626,000 -3,626,000 -3,626,000  -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 -3,626,000 
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,689,090 at december 31, 2023 and 204,162,814 at december 31, 2022
    		       203,689,000                                                                       
      investment in knife river
    		        276,213,000 246,063,000                                                                     
      less accumulated depreciation, depletion and amortization
    		        2,191,514,000 2,160,439,000 3,322,894,000 3,272,493,000 3,263,217,000 3,210,940,000 3,158,091,000 3,216,461,000 3,175,756,000 3,129,717,000 3,096,371,000 3,133,831,000 3,115,805,000 3,064,833,000 3,039,812,000 2,991,486,000 2,944,928,000 2,903,274,000 2,858,986,000 2,818,644,000 2,796,649,000 2,758,163,000 2,725,484,000 2,691,641,000 2,667,762,000 2,638,098,000 2,609,303,000 2,578,902,000 2,583,566,000 2,551,941,000 2,543,942,000 2,506,571,000 2,455,402,000 2,444,134,000 4,233,193,000 4,166,407,000 4,092,017,000 4,011,858,000 3,954,442,000 3,872,487,000 3,796,052,000 3,709,679,000 3,678,535,000 3,608,912,000 3,546,927,000 3,478,118,000 3,419,574,000 3,361,208,000 3,307,433,000 3,236,417,000 3,174,654,000 3,103,323,000 3,056,127,000 3,000,663,000 2,935,453,000 2,872,465,000 2,823,396,000 2,906,824,000 2,839,020,000 2,408,093,000 2,343,585,000 2,270,691,000 2,203,218,000 1,851,825,000 1,799,770,000 1,713,860,000 1,654,465,000 1,597,760,000 1,544,462,000 1,490,465,000 
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,638,373 at september 30, 2023, 203,889,661 atseptember 30, 2022 and 204,162,814 at december 31, 2022
    		        203,638,000                                                                      
      cash and cash equivalents
    		         50,780,000 93,189,000 80,517,000 74,620,000 65,394,000 64,904,000 54,161,000 57,241,000 57,946,000 55,094,000 59,547,000 66,070,000 64,358,000 116,526,000 66,459,000 67,000,000 71,966,000 49,721,000 53,948,000 67,077,000 41,659,000 58,764,000 34,599,000 37,356,000 40,048,000 50,735,000 46,107,000 59,868,000 85,117,000 90,938,000 84,591,000 88,630,000 144,372,000 122,241,000 81,855,000 233,676,000 90,318,000 83,700,000 45,225,000 66,174,000 114,971,000 74,149,000 49,042,000 74,242,000 101,643,000 91,389,000 162,772,000 118,702,000 107,768,000 136,016,000 222,074,000 36,285,000 65,792,000 106,664,000 175,114,000 61,449,000 34,310,000 44,689,000 82,039,000 71,504,000 105,820,000 94,528,000 68,134,000 51,574,000 70,205,000 116,698,000 109,749,000 107,435,000 98,392,000 
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,638,373 at june 30, 2023, 203,889,661 atjune 30, 2022 and 204,162,814 at december 31, 2022
    		         203,638,000                                                                     
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 204,162,814 at march 31, 2023, 203,889,661 atmarch 31, 2022 and 204,162,814 at december 31, 2022
    		          204,163,000                                                                    
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 204,162,814 at december 31, 2022 and 203,889,661 at december 31, 2021
    		           204,163,000                                                                   
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,889,661 at september 30, 2022, 203,889,661 atseptember 30, 2021 and 203,889,661 at december 31, 2021
    		            203,889,000                                                                  
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,889,661 at june 30, 2022, 202,822,301 atjune 30, 2021 and 203,889,661 at december 31, 2021
    		             203,889,000                                                                 
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,889,661 at march 31, 2022, 201,733,458 atmarch 31, 2021 and 203,889,661 at december 31, 2021
    		              203,889,000                                                                
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,889,661 at december 31, 2021 and 201,061,198 at december 31, 2020
    		               203,889,000                                                               
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 203,889,661 at september 30, 2021, 201,061,198 atseptember 30, 2020 and 201,061,198 at december 31, 2020
    		                203,889,000                                                              
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 202,822,301 at june 30, 2021, 201,061,198 atjune 30, 2020 and 201,061,198 at december 31, 2020
    		                 202,822,000                                                             
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 201,733,458 at march 31, 2021, 201,061,198 atmarch 31, 2020 and 201,061,198 at december 31, 2020
    		                  201,733,000                                                            
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 201,061,198 at december 31, 2020 and 200,922,790 at december 31, 2019
    		                   201,061,000                                                           
      asset retirement obligations due within one year
    		                    4,198,000 4,200,000 4,256,000                                                        
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 201,061,198 at september 30, 2020, 200,876,334 atseptember 30, 2019 and 200,922,790 at december 31, 2019
    		                    201,061,000                                                          
      common stockauthorized - 500,000,000 shares, 1.00 par valueshares issued - 201,061,198 at june 30, 2020, 199,539,110 atjune 30, 2019 and 200,922,790 at december 31, 2019
    		                     201,061,000                                                         
      common stock authorized - 500,000,000 shares, 1.00 par value shares issued - 201,061,198 at march 31, 2020, 198,316,808 at march 31, 2019 and 200,922,790 at december 31, 2019
    		                      201,061,000                                                        
      current assets held for sale
    		                       425,000 426,000 428,000 430,000 430,000 571,000 572,000 458,000 479,000 304,000 328,000 7,290,000 14,391,000 93,366,000 85,124,000 57,753,000 24,581,000 83,132,000 77,292,000                            179,000   23,871,000      
      deferred charges and other assets:
    		                                                                              
      noncurrent assets held for sale
    		                       1,426,000 2,087,000 2,087,000 2,087,000 2,087,000 1,835,000 3,998,000 4,392,000 4,392,000 64,333,000 76,183,000 95,719,000 196,664,000 69,061,000 123,721,000 97,549,000 166,734,000 499,913,000 749,804,000                               410,282,000      
      total deferred charges and other assets
    		                       1,319,560,000 1,322,553,000 1,278,557,000 1,255,696,000 1,086,681,000 1,054,534,000 1,059,969,000 1,052,104,000 1,047,870,000 1,120,179,000 1,129,518,000 1,142,602,000 1,249,799,000 1,077,654,000 1,132,928,000 1,106,856,000 1,175,765,000 1,498,745,000 1,755,921,000 970,912,000 970,321,000 894,174,000 896,837,000 894,729,000 900,326,000 948,192,000 948,391,000 947,572,000 952,328,000 968,187,000 978,344,000 967,483,000 967,049,000 919,286,000 911,783,000 913,754,000 917,540,000 921,467,000 916,326,000 910,699,000 889,761,000 889,852,000 889,887,000             
      current operating lease liabilities
    		                       31,664,000 32,584,000 31,615,000 30,978,000                                                    
      current liabilities held for sale
    		                       3,511,000 3,393,000 6,217,000 3,657,000 4,001,000 7,959,000 11,713,000 11,726,000 11,993,000 5,749,000 4,481,000 2,394,000 9,924,000 22,185,000 32,357,000 17,170,000 47,603,000 58,901,000 74,943,000                               19,150,000      
      deferred credits and other liabilities:
    		                                                                              
      noncurrent operating lease liabilities
    		                       83,742,000 86,166,000 87,172,000 76,444,000                                                    
      total deferred credits and other liabilities
    		                       1,742,819,000 1,720,382,000 1,690,606,000 1,664,271,000 1,578,444,000 1,560,127,000 1,538,197,000 1,528,137,000 1,526,411,000 1,541,907,000 1,555,764,000 1,557,012,000 1,552,003,000 1,515,593,000 1,520,888,000 1,539,410,000 1,531,978,000 1,516,329,000 1,544,635,000 1,615,383,000 1,766,222,000 1,615,608,000 1,662,332,000 1,619,962,000 1,578,244,000 1,602,939,000 1,593,477,000 1,617,448,000 1,573,261,000 1,632,183,000 1,673,375,000 1,640,838,000 1,596,394,000 1,457,411,000 1,439,078,000 1,433,361,000 1,408,716,000 1,390,486,000 1,335,659,000 1,284,768,000 1,265,443,000 1,239,499,000 1,085,056,000             
      common stock
    		                                                                              
      authorized - 500,000,000 shares, 1.00 par value shares issued - 200,922,790 at december 31, 2019 and 196,564,907 at december 31, 2018
    		                       200,923,000                                                       
      authorized - 500,000,000 shares, 1.00 par value shares issued - 200,876,334 at september 30, 2019, 196,557,245 at september 30, 2018 and 196,564,907 at december 31, 2018
    		                        200,876,000                                                      
      authorized - 500,000,000 shares, 1.00 par value shares issued - 199,539,110 at june 30, 2019, 196,557,245 at june 30, 2018 and 196,564,907 at december 31, 2018
    		                         199,539,000                                                     
      authorized - 500,000,000 shares, 1.00 par value shares issued - 198,316,808 at march 31, 2019, 195,843,297 at march 31, 2018 and 196,564,907 at december 31, 2018
    		                          198,317,000                                                    
      authorized - 500,000,000 shares, 1.00 par valueissued - 196,564,907 shares in 2018 and 195,843,297 shares in 2017
    		                           196,565,000                                                   
      authorized - 500,000,000 shares, 1.00 par value shares issued - 196,557,245 at september 30, 2018 and 195,843,297 at september 30, 2017 and december 31, 2017
    		                            196,557,000                                                  
      authorized - 500,000,000 shares, 1.00 par value shares issued - 196,557,245 at june 30, 2018 and 195,843,297 at june 30, 2017 and december 31, 2017
    		                             196,557,000                                                 
      preferred stocks
    		                                  15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 
      common stockholders' equity:
    		                                                                              
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at march 31, 2018 and 2017 and december 31, 2017
    		                              195,843,000                                                
      total common stockholders' equity
    		                              2,426,111,000 2,429,043,000 2,353,917,000 2,302,952,000 2,298,905,000 2,301,244,000 2,270,061,000 2,222,610,000 2,367,381,000 2,381,505,000 2,361,631,000 2,527,931,000 2,786,728,000 3,119,041,000 3,068,255,000 2,985,506,000 2,886,588,000 2,808,164,000 2,716,593,000 2,663,720,000 2,648,882,000 2,633,248,000 2,727,930,000 2,805,272,000 2,758,598,000 2,760,567,000 2,776,079,000 2,710,350,000 2,674,083,000 2,677,802,000    2,556,647,000      2,516,319,000         
      common stock (note 9)authorized - 500,000,000 shares, 1.00 par valueissued - 195,843,297 shares in 2017 and 2016
    		                               195,843,000                                               
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at september 30, 2017 and 2016 and december 31, 2016
    		                                195,843,000                                              
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at june 30, 2017 and 2016 and december 31, 2016
    		                                 195,843,000                                             
      liabilities and equity
    		                                                                              
      noncurrent liabilities held for sale
    		                                        31,242,000 35,790,000                               33,680,000      
      equity:
    		                                                                              
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at march 31, 2017 and 2016 and december 31, 2016
    		                                  195,843,000                                            
      noncontrolling interest
    		                                      113,003,000 124,043,000 138,240,000 143,961,000 132,715,000 115,743,000 75,248,000 63,936,000 48,216,000 32,738,000 18,897,000 15,922,000 11,100,000                            
      total equity
    		                                  2,313,905,000 2,316,244,000 2,285,061,000 2,237,610,000 2,495,384,000 2,520,548,000 2,514,871,000 2,686,892,000 2,934,443,000 3,249,784,000 3,158,503,000 3,064,442,000 2,949,804,000 2,855,902,000 2,750,490,000 2,694,642,000 2,674,982,000                            
      total liabilities and equity
    		                                  6,148,458,000 6,284,467,000 6,353,206,000 6,389,584,000 6,618,400,000 6,627,608,000 6,985,319,000 7,270,055,000 7,317,385,000 7,809,978,000 7,774,094,000 7,668,317,000 7,408,849,000 7,061,332,000 7,167,108,000 7,091,671,000 6,828,182,000                            
      common stock (note 9)authorized - 500,000,000 shares, 1.00 par valueissued - 195,843,297 shares in 2016 and 195,804,665 shares in 2015
    		                                   195,843,000                                           
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at september 30, 2016, 195,804,665 at september 30, 2015 and december 31, 2015
    		                                    195,843,000                                          
      other liabilities
    		                                     820,349,000 811,106,000 811,659,000 755,107,000 755,742,000 810,626,000 813,809,000 727,801,000 736,519,000 720,542,000 718,938,000 794,928,000 810,639,000 814,643,000 818,159,000 834,934,000 833,692,000 842,169,000 827,228,000 710,465,000 711,516,000 731,428,000 736,447,000 718,331,000 708,403,000 680,965,000 674,475,000 691,961,000 544,104,000 551,175,000 472,989,000 416,672,000 396,430,000 398,353,000 349,895,000 357,353,000 295,496,000 281,934,000 280,742,000 272,084,000 264,188,000 
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at june 30, 2016, 195,411,301 at june 30, 2015 and 195,804,665 at december 31, 2015
    		                                     195,843,000                                         
      authorized - 500,000,000 shares, 1.00 par value shares issued - 195,843,297 at march 31, 2016, 195,191,129 at march 31, 2015 and 195,804,665 at december 31, 2015
    		                                      195,843,000                                        
      common stock (note 10)authorized - 500,000,000 shares, 1.00 par valueissued - 195,804,665 shares in 2015 and 194,754,812 shares in 2014
    		                                       195,805,000                                       
      authorized - 500,000,000 shares, 1.00 par valueshares issued - 195,804,665 at september 30, 2015, 194,548,389 atseptember 30, 2014 and 194,754,812 at december 31, 2014
    		                                        195,805,000                                      
      authorized - 500,000,000 shares, 1.00 par value
    		                                                                              
      shares issued - 195,411,301 at june 30, 2015,194,138,654 at june 30, 2014 and 194,754,812 at december 31, 2014
    		                                         195,411,000                                     
      commodity derivative instruments
    		                                          7,127,000 18,335,000 11,322,000 129,000 81,000 1,447,000 4,373,000 9,797,000 5,936,000 18,304,000 19,193,000 37,000,000 26,698,000 27,687,000 38,794,000 14,234,000 13,250,000 15,123,000 26,803,000 24,932,000 38,146,000 7,761,000 28,421,000 62,048,000 92,577,000            
      shares issued - 195,191,129 at march 31, 2015,191,838,720 at march 31, 2014 and 194,754,812 at december 31, 2014
    		                                          195,191,000                                    
      common stock (note 12)authorized - 500,000,000 shares, 1.00 par valueissued - 194,754,812 shares in 2014 and 189,868,780 shares in 2013
    		                                           194,755,000                                   
      shares issued - 194,548,389 at september 30, 2014, 189,369,450 at september 30, 2013 and 189,868,780 at december 31, 2013
    		                                            194,548,000                                  
      shares issued - 194,138,654 at june 30, 2014, 189,369,450 at june 30, 2013 and 189,868,780 at december 31, 2013
    		                                             194,139,000                                 
      shares issued - 191,838,720 at march 31, 2014, 189,369,450 at march 31, 2013 and 189,868,780 at december 31, 2013
    		                                              191,839,000                                
      common stock (note 12)authorized - 500,000,000 shares, 1.00 par valueissued - 189,868,780 shares in 2013 and 189,369,450 shares in 2012
    		                                               189,869,000                               
      shares issued - 189,369,450 at september 30, 2013 and 2012 and december 31, 2012
    		                                                189,369,000                              
      shares issued - 189,369,450 at june 30, 2013 and 2012 and december 31, 2012
    		                                                 189,369,000                             
      shares issued - 189,369,450 at march 31, 2013 and 2012 and december 31, 2012
    		                                                  189,369,000                            
      common stock (note 12)authorized - 500,000,000 shares, 1.00 par valueissued - 189,369,450 shares in 2012 and 189,332,485 shares in 2011
    		                                                   189,369,000                           
      shares issued - 189,369,450 at september 30, 2012, 189,332,485 at september 30, 2011 and 189,332,485 at december 31, 2011
    		                                                    189,369,000                          
      shares issued - 189,369,450 at june 30, 2012, 189,332,485 at june 30, 2011 and 189,332,485 at december 31, 2011
    		                                                     189,369,000                         
      shares issued - 189,369,450 at march 31, 2012, 189,332,485 at march 31, 2011 and 189,332,485 at december 31, 2011
    		                                                      189,369,000                        
      issued - 189,332,485 shares in 2011 and 188,901,379 shares in 2010
    		                                                       189,332,000                       
      shares issued -- 1.00 par value, 189,332,485 at september 30, 2011, 188,732,200 at september 30, 2010 and 188,901,379 at december 31, 2010
    		                                                        189,332,000                      
      accumulated other comprehensive income
    		                                                        -588,000  -53,112,000  496,000 -463,000 635,000 -20,833,000 -18,338,000 1,669,000 21,109,000    -6,327,000   8,271,000     
      shares issued -- 1.00 par value, 189,332,485 at june 30, 2011, 188,672,532 at june 30, 2010 and 188,901,379 at december 31, 2010
    		                                                         189,332,000                     
      shares issued -- 1.00 par value, 189,332,485 at march 31, 2011, 188,656,012 at march 31, 2010 and 188,901,379 at december 31, 2010
    		                                                          189,332,000                    
      authorized – 500,000,000 shares, 1.00 par value
    		                                                                              
      issued – 188,901,379 shares in 2010 and 188,389,265 shares in 2009
    		                                                           188,901,000                   
      short-term investments
    		                                                            250,000 250,000 250,000 2,833,000 1,644,000 1,967,000 2,329,000 13,768,000 13,491,000 91,550,000         
      liabilities and stockholders’ equity
    		                                                                              
      stockholders’ equity:
    		                                                                              
      common stockholders’ equity:
    		                                                                              
      shares issued -- 1.00 par value, 188,732,200 at september 30, 2010, 187,673,037 at september 30, 2009 and 188,389,265 at december 31, 2009
    		                                                            188,732,000                  
      total common stockholders’ equity
    		                                                            2,647,121,000 2,612,740,000 2,593,020,000  2,501,277,000 2,395,102,000 2,386,599,000 2,575,607,000 2,526,342,000  2,448,264,000 2,256,670,000 2,177,156,000 2,105,830,000 1,995,450,000 1,940,944,000 1,876,622,000 1,771,014,000 
      total stockholders’ equity
    		                                                            2,662,121,000 2,627,740,000 2,608,020,000  2,516,277,000 2,410,102,000 2,401,599,000 2,590,607,000 2,541,342,000  2,463,264,000 2,271,670,000 2,192,156,000 2,120,830,000 2,010,450,000 1,955,944,000 1,891,622,000 1,786,014,000 
      total liabilities and stockholders’ equity
    		                                                            6,216,955,000 6,112,806,000 5,981,847,000 5,990,952,000 5,872,572,000 5,823,364,000             
      shares issued -- 1.00 par value, 188,672,532 at june 30, 2010, 184,508,109 at june 30, 2009 and 188,389,265 at december 31, 2009
    		                                                             188,673,000                 
      shares issued -- 1.00 par value, 188,656,012 at march 31, 2010; 184,499,434 at march 31, 2009 and 188,389,265 at december 31, 2009
    		                                                              188,656,000                
      issued – 188,389,265 shares in 2009 and 184,208,283 shares in 2008
    		                                                               188,389,000               
      shares issued – 1.00 par value, 187,673,037 at september 30, 2009, 183,770,147 at september 30, 2008 and 184,208,283 at december 31, 2008
    		                                                                187,673,000              
      shares issued -- 1.00 par value, 184,508,109 at june 30, 2009, 183,706,236 at june 30, 2008 and 184,208,283 at december 31, 2008
    		                                                                 184,508,000             
      shares issued -- 1.00 par value, 184,499,434 at march 31, 2009; 183,336,872 at march 31, 2008 and 184,208,283 at december 31, 2008
    		                                                                  184,499,000            
      current assets held for sale and related to discontinued operations
    		                                                                      594,000 69,662,000       
      noncurrent assets held for sale and related to discontinued operations
    		                                                                      140,000 410,662,000       
      current liabilities held for sale and related to discontinued operations
    		                                                                       14,156,000       
      noncurrent liabilities held for sale and related to discontinued operations
    		                                                                       35,488,000       
      shares issued -- 1.00 par value, 183,706,236 at june 30, 2008, 182,416,029 at june 30, 2007 and 182,946,528 at december 31, 2007
    		                                                                   183,706,000           
      shares issued -- 1.00 par value 183,336,872 at march 31, 2008, 182,319,441 at march 31, 2007 and 182,946,528 at december 31, 2007
    		                                                                    183,337,000          
      authorized – 500,000,000 shares, 1.00 par value in 2007, 250,000,000 shares, 1.00 par value in 2006
    		                                                                              
      issued – 182,946,528 shares in 2007 and 181,557,543 shares in 2006
    		                                                                     182,947,000         
      shares issued -- 1.00 par value 182,914,769 at september 30, 2007, 181,279,379 at september 30, 2006 and 181,557,543 at december 31, 2006
    		                                                                      182,915,000        
      shares issued -- 1.00 par value, 182,416,029 at june 30, 2007, 180,515,943 at june 30, 2006 and 181,557,543 at december 31, 2006
    		                                                                       182,416,000       
      shares issued -- 1.00 par value 182,319,441 at march 31, 2007, 120,290,305 at march 31, 2006 and 181,557,543 at december 31, 2006
    		                                                                        182,319,000      
      assets current assets:
    		                                                                              
      shares issued -- 1.00 par value 181,279,379 at september 30, 2006, 120,191,877 at september 30, 2005 and 120,262,786 at december 31, 2005
    		                                                                         181,279,000     
      shares issued -- 1.00 par value 180,515,943 at june 30, 2006, 120,093,303 at june 30, 2005 and 120,262,786 at december 31, 2005
    		                                                                          180,516,000    
      shares issued -- 1.00 par value 120,290,305 at march 31, 2006, 118,774,075 at march 31, 2005 and 120,262,786 at december 31, 2005
    		                                                                           120,290,000   
      authorized - 250,000,000 shares, 1.00 par value
    		                                                                              
      issued - 120,262,786 shares in 2005 and 118,586,065 shares in 2004
    		                                                                            120,263,000  
      shares issued -- 1.00 par value 120,191,877 at september 30, 2005, 118,395,863 at september 30, 2004 and 118,586,065 at december 31, 2004
    		                                                                             120,192,000 
    The information provided in this report is taken from www.sec.gov and many other data providers. While we have conducted our best efforts to ensure that the parsed data is accurate, we cannot guarantee its accuracy. Please use caution and understand that any consequences of its use are your own responsibility.