7Baggers

Portland General Electric Company
(NYSE:POR) 

POR stock logo

Portland General Electric Company, an integrated electric utility company, engages in the generation, wholesale purchase, transmission, distribution, and retail sale of electricity in the state of Oregon. The company operates six thermal plants; seven hydroelectric plants; and three wind farms. As o...

Founded: 1888
Full Time Employees: 2,949
CEO: Maria Pope  
Sector: Utilities
Industry: Utilities-Regulated Electric

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At a glance:
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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 2010-06-30 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 
                                                                            
      revenues:
                                                                            
      revenues
    863,000,000 879,000,000 946,000,000 798,000,000 932,000,000 837,000,000 942,000,000 761,000,000 940,000,000 720,000,000 801,000,000 646,000,000 745,000,000 681,000,000 742,000,000 588,000,000 625,000,000 614,000,000 654,000,000 545,000,000 612,000,000 562,000,000 556,000,000 469,000,000 564,000,000 551,000,000 538,000,000 462,000,000 570,000,000 519,000,000 525,000,000 449,000,000 495,000,000 515,000,000 515,000,000 449,000,000 530,000,000 524,000,000 484,000,000 428,000,000 487,000,000 499,000,000 476,000,000 450,000,000 473,000,000 500,000,000 484,000,000 423,000,000 493,000,000 499,000,000 435,000,000 403,000,000 473,000,000 463,000,000 450,000,000 413,000,000 479,000,000 479,000,000 439,000,000 411,000,000 484,000,000 415,000,000 449,000,000 485,000,000 445,000,000 389,000,000 485,000,000 449,000,000 400,000,000 425,000,000 471,000,000  
      alternative revenue programs, net of amortization
    16,000,000 10,000,000 6,000,000 9,000,000 -4,000,000 -13,000,000 -13,000,000 -3,000,000 -11,000,000 5,000,000 1,000,000 2,000,000 3,000,000 6,000,000 1,000,000 3,000,000 1,000,000 -6,000,000 -12,000,000 -8,000,000 -3,000,000  -9,000,000  9,000,000 -3,000,000 4,000,000 -2,000,000 3,000,000 5,000,000   -2,000,000                                        
      total revenues
    879,000,000 889,000,000 952,000,000 807,000,000 928,000,000 824,000,000 929,000,000 758,000,000 929,000,000 725,000,000 802,000,000 648,000,000 748,000,000 687,000,000 743,000,000 591,000,000 626,000,000 608,000,000 642,000,000 537,000,000 609,000,000 556,000,000 547,000,000 469,000,000 573,000,000 548,000,000 542,000,000 460,000,000 573,000,000 524,000,000 525,000,000 449,000,000 493,000,000                                        
      yoy
    -5.28% 7.89% 2.48% 6.46% -0.11% 13.66% 15.84% 16.98% 24.20% 5.53% 7.94% 9.64% 19.49% 12.99% 15.73% 10.06% 2.79% 9.35% 17.37% 14.50% 6.28% 1.46% 0.92% 1.96% 0.00% 4.58% 3.24% 2.45% 16.23%                                            
      qoq
    -1.12% -6.62% 17.97% -13.04% 12.62% -11.30% 22.56% -18.41% 28.14% -9.60% 23.77% -13.37% 8.88% -7.54% 25.72% -5.59% 2.96% -5.30% 19.55% -11.82% 9.53% 1.65% 16.63% -18.15% 4.56% 1.11% 17.83% -19.72% 9.35% -0.19% 16.93% -8.92%                                         
      operating expenses:
                                                                            
      purchased power and fuel
    361,000,000 377,000,000 372,000,000 294,000,000 368,000,000 358,000,000 380,000,000 275,000,000 405,000,000 280,000,000 386,000,000 220,000,000 304,000,000 281,000,000 337,000,000 168,000,000 202,000,000 209,000,000 259,000,000 185,000,000 169,000,000 154,000,000 292,000,000 109,000,000 153,000,000 165,000,000 165,000,000 105,000,000 179,000,000 151,000,000 186,000,000 104,000,000 130,000,000 149,000,000 184,000,000 118,000,000 141,000,000 162,000,000 180,000,000 126,000,000 149,000,000 171,000,000 181,000,000 148,000,000 161,000,000 185,000,000 202,000,000 142,000,000 184,000,000 219,000,000 190,000,000 156,000,000 192,000,000 193,000,000 182,000,000 156,000,000 195,000,000 215,000,000 182,000,000 169,000,000 194,000,000 186,000,000 224,000,000 280,000,000 225,000,000 184,000,000 255,000,000 226,000,000 217,000,000 185,000,000 250,000,000  
      generation, transmission and distribution
    110,000,000 114,000,000 112,000,000 114,000,000 110,000,000 99,000,000 131,000,000 107,000,000 99,000,000 95,000,000 85,000,000 101,000,000 93,000,000 90,000,000 83,000,000 85,000,000 90,000,000 74,000,000 80,000,000 76,000,000 80,000,000 78,000,000 65,000,000 77,000,000 73,000,000 82,000,000 78,000,000 86,000,000 77,000,000 80,000,000 72,000,000 71,000,000 69,000,000 74,000,000 73,000,000 81,000,000 81,000,000 87,000,000 69,000,000 64,000,000 66,000,000 74,000,000 64,000,000 66,000,000 62,000,000                            
      administrative and other
    106,000,000 101,000,000 99,000,000 96,000,000 96,000,000 109,000,000 102,000,000 97,000,000 95,000,000 79,000,000 89,000,000 93,000,000 80,000,000 83,000,000 84,000,000 84,000,000 89,000,000 89,000,000 82,000,000 79,000,000 86,000,000 75,000,000 63,000,000 74,000,000 71,000,000 67,000,000 74,000,000 78,000,000 71,000,000 83,000,000 49,000,000 70,000,000 69,000,000 67,000,000 64,000,000 65,000,000 68,000,000 62,000,000 63,000,000 61,000,000 61,000,000 62,000,000 59,000,000 60,000,000 60,000,000 63,000,000 54,000,000 56,000,000 54,000,000 61,000,000 49,000,000 55,000,000 54,000,000 56,000,000 50,000,000 56,000,000 54,000,000 60,000,000 55,000,000 51,000,000 52,000,000 48,000,000 45,000,000 45,000,000 43,000,000 46,000,000 45,000,000 48,000,000 48,000,000 47,000,000 47,000,000  
      depreciation and amortization
    144,000,000 151,000,000 148,000,000 139,000,000 140,000,000 127,000,000 126,000,000 122,000,000 121,000,000 118,000,000 116,000,000 113,000,000 111,000,000 107,000,000 108,000,000 103,000,000 99,000,000 99,000,000 101,000,000 101,000,000 103,000,000 134,000,000 108,000,000 104,000,000 108,000,000 104,000,000 103,000,000 101,000,000 101,000,000 101,000,000 96,000,000 93,000,000 92,000,000 88,000,000 87,000,000 86,000,000 84,000,000 77,000,000 79,000,000 83,000,000 82,000,000 78,000,000 76,000,000 76,000,000 75,000,000 77,000,000 76,000,000 73,000,000 75,000,000 62,000,000 62,000,000 62,000,000 62,000,000 60,000,000 63,000,000 63,000,000 62,000,000 57,000,000 59,000,000 55,000,000 56,000,000 57,000,000 57,000,000 51,000,000 53,000,000 50,000,000 57,000,000 54,000,000 54,000,000 50,000,000 50,000,000  
      taxes other than income taxes
    51,000,000 51,000,000 47,000,000 46,000,000 46,000,000 43,000,000 44,000,000 41,000,000 47,000,000 40,000,000 41,000,000 40,000,000 43,000,000 39,000,000 39,000,000 39,000,000 40,000,000 36,000,000 37,000,000 35,000,000 38,000,000 34,000,000 35,000,000 34,000,000 35,000,000 33,000,000 34,000,000 33,000,000 34,000,000 34,000,000 31,000,000 31,000,000 33,000,000 29,000,000 30,000,000 31,000,000 33,000,000 30,000,000 29,000,000 30,000,000 30,000,000 30,000,000 28,000,000 28,000,000 30,000,000 27,000,000 27,000,000 27,000,000 28,000,000 24,000,000 27,000,000 25,000,000 27,000,000 25,000,000 24,000,000 26,000,000 27,000,000 24,000,000 25,000,000 24,000,000 25,000,000 21,000,000 23,000,000 20,000,000 20,000,000 21,000,000 23,000,000 20,000,000 20,000,000 21,000,000 22,000,000  
      total operating expenses
    772,000,000 794,000,000 778,000,000 689,000,000 760,000,000 736,000,000 783,000,000 642,000,000 767,000,000 612,000,000 717,000,000 567,000,000 631,000,000 600,000,000 651,000,000 479,000,000 520,000,000 507,000,000 559,000,000 476,000,000 476,000,000 475,000,000 563,000,000 398,000,000 440,000,000 451,000,000 454,000,000 403,000,000 462,000,000 449,000,000 434,000,000 369,000,000 393,000,000 407,000,000 438,000,000 381,000,000 407,000,000 418,000,000 420,000,000 364,000,000 388,000,000 415,000,000 408,000,000 378,000,000 388,000,000 428,000,000 419,000,000 365,000,000 395,000,000 422,000,000 382,000,000 414,000,000 386,000,000 392,000,000 368,000,000 352,000,000 391,000,000 410,000,000 371,000,000 354,000,000 369,000,000 358,000,000 388,000,000 447,000,000 383,000,000 344,000,000 422,000,000 392,000,000 379,000,000 349,000,000 408,000,000  
      income from operations
    107,000,000 95,000,000 174,000,000 118,000,000 168,000,000 88,000,000 146,000,000 116,000,000 162,000,000 113,000,000 85,000,000 81,000,000 117,000,000 87,000,000 92,000,000 112,000,000 106,000,000 101,000,000 83,000,000 61,000,000 133,000,000 81,000,000 -16,000,000 71,000,000 133,000,000 97,000,000 88,000,000 57,000,000 111,000,000 75,000,000 91,000,000 80,000,000 100,000,000 108,000,000 77,000,000 68,000,000 123,000,000 106,000,000 64,000,000 64,000,000 99,000,000 84,000,000 68,000,000 72,000,000 85,000,000 72,000,000 65,000,000 58,000,000 98,000,000 77,000,000 53,000,000 -11,000,000 87,000,000 71,000,000 82,000,000 61,000,000 88,000,000 69,000,000 68,000,000 57,000,000 115,000,000 57,000,000 61,000,000 38,000,000 62,000,000 45,000,000 63,000,000 57,000,000 21,000,000 76,000,000 63,000,000  
      yoy
    -36.31% 7.95% 19.18% 1.72% 3.70% -22.12% 71.76% 43.21% 38.46% 29.89% -7.61% -27.68% 10.38% -13.86% 10.84% 83.61% -20.30% 24.69% -618.75% -14.08% 0.00% -16.49% -118.18% 24.56% 19.82% 29.33% -3.30% -28.75% 11.00% -30.56% 18.18% 17.65% -18.70% 1.89% 20.31% 6.25% 24.24% 26.19% -5.88% -11.11% 16.47% 16.67% 4.62% 24.14% -13.27% -6.49% 22.64% -627.27% 12.64% 8.45% -35.37% -118.03% -1.14% 2.90% 20.59% 7.02% -23.48% 21.05% 11.48% 50.00% 85.48% 26.67% -3.17% -33.33% 195.24% -40.79% 0.00%      
      qoq
    12.63% -45.40% 47.46% -29.76% 90.91% -39.73% 25.86% -28.40% 43.36% 32.94% 4.94% -30.77% 34.48% -5.43% -17.86% 5.66% 4.95% 21.69% 36.07% -54.14% 64.20% -606.25% -122.54% -46.62% 37.11% 10.23% 54.39% -48.65% 48.00% -17.58% 13.75% -20.00% -7.41% 40.26% 13.24% -44.72% 16.04% 65.63% 0.00% -35.35% 17.86% 23.53% -5.56% -15.29% 18.06% 10.77% 12.07% -40.82% 27.27% 45.28% -581.82% -112.64% 22.54% -13.41% 34.43% -30.68% 27.54% 1.47% 19.30% -50.43% 101.75% -6.56% 60.53% -38.71% 37.78% -28.57% 10.53% 171.43% -72.37% 20.63%   
      operating margin %
    12.17% 10.69% 18.28% 14.62% 18.10% 10.68% 15.72% 15.30% 17.44% 15.59% 10.60% 12.50% 15.64% 12.66% 12.38% 18.95% 16.93% 16.61% 12.93% 11.36% 21.84% 14.57% -2.93% 15.14% 23.21% 17.70% 16.24% 12.39% 19.37% 14.31% 17.33% 17.82% 20.28% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity%  
      interest expense
    60,000,000 59,000,000 60,000,000 57,000,000 56,000,000 55,000,000 53,000,000 52,000,000 51,000,000 46,000,000 42,000,000 41,000,000 44,000,000 41,000,000 39,000,000 38,000,000 38,000,000 37,000,000 33,000,000 33,000,000 34,000,000 34,000,000 35,000,000 34,000,000 33,000,000 33,000,000 32,000,000 31,000,000 32,000,000 31,000,000 31,000,000 31,000,000 31,000,000 30,000,000 30,000,000 30,000,000 30,000,000 30,000,000 28,000,000 27,000,000 27,000,000 28,000,000 28,000,000 28,000,000 30,000,000 25,000,000 23,000,000 23,000,000 25,000,000 26,000,000 25,000,000 25,000,000 25,000,000 26,000,000 27,000,000 27,000,000 28,000,000 28,000,000 27,000,000 28,000,000 27,000,000 26,000,000 29,000,000 28,000,000 25,000,000 26,000,000 25,000,000 23,000,000 21,000,000 23,000,000 23,000,000  
      other income:
                                                                            
      allowance for equity funds used during construction
    3,000,000 3,000,000 4,000,000 6,000,000 5,000,000 6,000,000 6,000,000 6,000,000 5,000,000 7,000,000 5,000,000 4,000,000 3,000,000 4,000,000 4,000,000 3,000,000 3,000,000 4,000,000 4,000,000 5,000,000 4,000,000 5,000,000 4,000,000 4,000,000 3,000,000 3,000,000 2,000,000 2,000,000 3,000,000 3,000,000 2,000,000 2,000,000 4,000,000 3,000,000 4,000,000 3,000,000 2,000,000 2,000,000 4,000,000 8,000,000 7,000,000 6,000,000 6,000,000 5,000,000 4,000,000 11,000,000 11,000,000 9,000,000 6,000,000   2,000,000 2,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 4,000,000 4,000,000 5,000,000 5,000,000 6,000,000 2,000,000 2,000,000 3,000,000 2,000,000 2,000,000  
      miscellaneous income
    4,000,000 1,000,000 5,000,000 7,000,000 5,000,000 5,000,000 6,000,000 9,000,000 6,000,000 9,000,000 5,000,000 5,000,000 12,000,000 4,000,000 13,000,000   3,000,000 1,000,000 3,000,000 2,000,000 4,000,000 3,000,000 3,000,000 -4,000,000 1,000,000 3,000,000  2,000,000   1,000,000 -1,000,000 1,000,000 2,000,000 1,000,000 1,000,000   1,000,000 -1,000,000  -2,000,000 1,000,000 1,000,000  1,000,000 1,000,000 -1,000,000   1,000,000 1,000,000 2,000,000  -1,000,000 3,000,000 2,000,000 -4,000,000 1,000,000 2,000,000 -3,000,000 1,000,000 -3,000,000 5,000,000 4,000,000 -3,000,000 -8,000,000 -4,000,000 1,000,000   
      other income
    7,000,000 4,000,000 9,000,000 13,000,000 10,000,000 11,000,000 12,000,000 15,000,000 11,000,000 16,000,000 10,000,000 9,000,000 15,000,000 8,000,000 17,000,000 3,000,000 3,000,000 7,000,000 5,000,000 8,000,000 6,000,000 9,000,000 7,000,000 7,000,000 -1,000,000 4,000,000 5,000,000 2,000,000 5,000,000 -1,000,000 2,000,000 3,000,000 3,000,000 4,000,000 6,000,000 4,000,000 3,000,000 3,000,000 4,000,000 9,000,000 6,000,000 7,000,000 4,000,000 6,000,000 5,000,000 11,000,000 12,000,000 10,000,000 5,000,000 7,000,000 7,000,000 3,000,000 3,000,000 4,000,000 1,000,000 1,000,000 4,000,000 4,000,000 -3,000,000 2,000,000 3,000,000 1,000,000 5,000,000 2,000,000 10,000,000 10,000,000  -6,000,000 -1,000,000 3,000,000   
      income before income tax expense
    54,000,000 79,750,000 123,000,000 74,000,000 122,000,000 76,500,000 105,000,000 79,000,000 122,000,000 47,500,000 53,000,000 49,000,000 88,000,000 54,500,000 70,000,000 77,000,000 71,000,000 49,000,000 55,000,000 36,000,000 105,000,000 24,750,000 -44,000,000 44,000,000 99,000,000 43,250,000 61,000,000 28,000,000 84,000,000 46,500,000 62,000,000 52,000,000 72,000,000 47,750,000 53,000,000 42,000,000 96,000,000 41,000,000 40,000,000 46,000,000 78,000,000 38,500,000 44,000,000 50,000,000 60,000,000 44,250,000 54,000,000 45,000,000 78,000,000 16,750,000 35,000,000 -33,000,000            28,250,000 47,000,000   23,500,000 -1,000,000    
      income tax expense
    9,000,000 -1,000,000 20,000,000 12,000,000 22,000,000 6,000,000 11,000,000 7,000,000 13,000,000 15,000,000 6,000,000 10,000,000 14,000,000 3,000,000 12,000,000 13,000,000 11,000,000 5,000,000 5,000,000 4,000,000 9,000,000 -1,000,000 -27,000,000 5,000,000 18,000,000 7,000,000 6,000,000 3,000,000 11,000,000 -6,000,000 9,000,000 6,000,000 8,000,000 40,000,000 13,000,000 10,000,000 23,000,000 18,000,000 6,000,000 9,000,000 17,000,000 12,000,000 8,000,000 15,000,000 10,000,000 15,000,000 16,000,000 10,000,000 20,000,000 11,000,000 4,000,000 -11,000,000            8,000,000 16,000,000   6,750,000 -1,000,000    
      net income and comprehensive income
    45,000,000 66,500,000 104,000,000 62,000,000 100,000,000 68,750,000 93,000,000 72,000,000 110,000,000 40,250,000 47,000,000 40,000,000 74,000,000 45,750,000 58,000,000 65,000,000 60,000,000             40,750,000 53,000,000   36,250,000 40,000,000   33,000,000 34,000,000 37,000,000 61,000,000 30,250,000 36,000,000 35,000,000 50,000,000 32,750,000 38,000,000 35,000,000 58,000,000 14,250,000 31,000,000 -22,000,000 48,000,000                    
      weighted-average common shares outstanding
                                                                            
      basic
    115,641,000,000 110,471,000,000 110,170,000,000 109,522,000,000 109,423,000,000 103,946,000,000 103,845,000,000 103,034,000,000 101,299,000,000 97,760,000,000 100,849,000,000 97,087,000,000 91,840,000,000 89,290,000,000 89,263,000,000 89,225,000,000 89,396,000,000 89,481,000,000 89,407,000,000 89,554,000,000 89,556,000,000 89,485,000,000 89,509,000,000 89,489,000,000 89,429,000,000 89,353,000,000 89,372,000,000 89,357,000,000  89,215,000,000    89,056,000,000    88,896,000,000  88,902,000,000 88,833,000,000 84,180,000,000 88,766,000,000 80,745,000,000 78,271,000,000 78,180,000,000 78,203,000,000 78,183,000,000 78,992,000,000 76,821,000,000 77,637,000,000 75,935,000,000 75,608,000,000 75,498,000,000 75,528,000,000 75,507,000,000 75,423,000,000 75,333,000,000 75,342,000,000 75,326,000,000 75,318,000,000 75,276,000,000 75,229,000,000 72,790,000,000 75,182,000,000 75,131,000,000 65,521,000,000 62,544,000,000 62,554,000,000 62,532,000,000 62,530,000,000  
      diluted
    116,140,000,000 110,739,000,000 110,416,000,000 109,765,000,000 109,683,000,000 104,159,000,000 104,338,000,000 103,232,000,000 101,467,000,000 97,952,000,000 101,103,000,000 97,630,000,000 92,571,000,000 89,643,000,000 89,447,000,000 89,371,000,000 89,527,000,000 89,627,000,000 89,566,000,000 89,672,000,000 89,703,000,000 89,645,000,000 89,509,000,000 89,625,000,000 89,579,000,000 89,559,000,000 89,594,000,000 89,561,000,000  89,347,000,000    89,176,000,000    89,054,000,000  88,902,000,000 88,833,000,000 84,341,000,000 88,766,000,000 80,745,000,000 81,466,000,000 80,494,000,000 80,225,000,000 80,051,000,000 80,156,000,000 77,388,000,000 78,330,000,000 75,935,000,000 75,699,000,000 75,647,000,000 75,541,000,000 75,517,000,000 75,443,000,000 75,350,000,000 75,358,000,000 75,401,000,000 75,337,000,000 75,290,000,000 75,246,000,000 72,852,000,000 75,223,000,000 75,235,000,000 65,607,000,000 62,581,000,000 62,607,000,000 62,588,000,000 62,571,000,000  
      earnings per share:
                                                                            
      basic
    0.39 0.35 0.94 0.56  0.34 0.91  1.08 0.68 0.47  0.81 0.57 0.65   0.73 0.56 0.36  0.57 -0.19 0.44  0.68 0.61 0.28            0.42 0.68 0.58 0.4 0.44 0.64 0.57 0.48 0.44 0.74         0.393 0.36 0.29 0.92 0.32 0.36          
      diluted
    0.38 0.36 0.94 0.56  0.34 0.9  1.08 0.68 0.46  0.8 0.56 0.65   0.74 0.56 0.36  0.57 -0.19 0.43  0.69 0.61 0.28            0.42 0.68 0.57 0.4 0.44 0.62 0.55 0.47 0.43 0.73         0.393 0.36 0.29 0.92 0.32 0.36          
      net income
     41,000,000 103,000,000 62,000,000 100,000,000 38,000,000 94,000,000 72,000,000 109,000,000 68,000,000 47,000,000 39,000,000  51,000,000 58,000,000 64,000,000  66,000,000 50,000,000 32,000,000 96,000,000 52,000,000 -17,000,000 39,000,000 81,000,000 61,000,000 55,000,000 25,000,000 73,000,000   46,000,000 64,000,000   32,000,000 73,000,000                 28,000,000 37,000,000   29,000,000 27,000,000   24,000,000 27,000,000 8,000,000 31,000,000 26,000,000 24,000,000 20,000,000  39,000,000 28,000,000  
      yoy
     7.89% 9.57% -13.89% -8.26% -44.12% 100.00% 84.62%  33.33% -18.97% -39.06%  -22.73% 16.00% 100.00%  26.92% -394.12% -17.95% 18.52% -14.75% -130.91% 56.00% 10.96%   -45.65% 14.06%   43.75% -12.33%                     -3.45% 37.04%   20.83% 0.00%   -7.69% 12.50% -60.00%  -33.33% -14.29%      
      qoq
     -60.19% 66.13% -38.00% 163.16% -59.57% 30.56% -33.94% 60.29% 44.68% 20.51%   -12.07% -9.38%   32.00% 56.25% -66.67% 84.62% -405.88% -143.59% -51.85% 32.79% 10.91% 120.00% -65.75%    -28.13%    -56.16%                  -24.32%    7.41%    -11.11% 237.50% -74.19% 19.23% 8.33% 20.00%   39.29%   
      net income margin %
    0% 4.61% 10.82% 7.68% 10.78% 4.61% 10.12% 9.50% 11.73% 9.38% 5.86% 6.02% 0% 7.42% 7.81% 10.83% 0% 10.86% 7.79% 5.96% 15.76% 9.35% -3.11% 8.32% 14.14% 11.13% 10.15% 5.43% 12.74% 0% 0% 10.24% 12.98% NaN% NaN% Infinity% Infinity% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% Infinity% Infinity% NaN% NaN% Infinity% Infinity% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% Infinity%  
      other comprehensive income
     250,000 1,000,000    -1,000,000  1,000,000 250,000  1,000,000  250,000  1,000,000  250,000 1,000,000   250,000   1,000,000 500,000  1,000,000 1,000,000       1,000,000                                     
      see accompanying notes to condensed consolidated financial statements.
                                                                            
      earnings per share—basic and diluted
        0.91   0.69    0.39    0.72 0.67    1.07    0.91    0.82 0.455 0.59 0.51 0.72 0.405 0.44 0.36 0.82 0.373 0.38           0.19 0.4 -0.29 0.65 0.38 0.5 0.34                 
      comprehensive income
                     44,750,000 51,000,000 32,000,000 96,000,000 26,000,000 -17,000,000 39,000,000 82,000,000 38,750,000 55,000,000 26,000,000 74,000,000   46,000,000 64,000,000   33,000,000 72,000,000                                    
      weighted-average common shares outstanding—basic and diluted
                                89,309,000,000  89,239,000,000                                          
      dividends declared per common share
                                 0.266 0.363 0.363 0.34 0.25 0.34 0.34 0.32 0.235 0.32 0.32 0.3 0.22 0.3 0.3 0.28 0.209 0.28 0.28 0.275 0.205 0.275 0.275 0.27 0.27 0.27 0.27 0.265 0.265 0.265 0.265 0.26 0.26 0.255 0.255 0.255 0.255 0.245      
      weighted-average shares outstanding—basic and diluted
                                   89,215,000,000 89,160,000,000  89,065,000,000 89,063,000,000 89,003,000,000  88,921,000,000                                  
      other comprehensive loss
                                        -1,000,000                                    
      weighted-average shares outstanding
                                                                            
      basic
    115,641,000,000 110,471,000,000 110,170,000,000 109,522,000,000 109,423,000,000 103,946,000,000 103,845,000,000 103,034,000,000 101,299,000,000 97,760,000,000 100,849,000,000 97,087,000,000 91,840,000,000 89,290,000,000 89,263,000,000 89,225,000,000 89,396,000,000 89,481,000,000 89,407,000,000 89,554,000,000 89,556,000,000 89,485,000,000 89,509,000,000 89,489,000,000 89,429,000,000 89,353,000,000 89,372,000,000 89,357,000,000  89,215,000,000    89,056,000,000    88,896,000,000  88,902,000,000 88,833,000,000 84,180,000,000 88,766,000,000 80,745,000,000 78,271,000,000 78,180,000,000 78,203,000,000 78,183,000,000 78,992,000,000 76,821,000,000 77,637,000,000 75,935,000,000 75,608,000,000 75,498,000,000 75,528,000,000 75,507,000,000 75,423,000,000 75,333,000,000 75,342,000,000 75,326,000,000 75,318,000,000 75,276,000,000 75,229,000,000 72,790,000,000 75,182,000,000 75,131,000,000 65,521,000,000 62,544,000,000 62,554,000,000 62,532,000,000 62,530,000,000  
      diluted
    116,140,000,000 110,739,000,000 110,416,000,000 109,765,000,000 109,683,000,000 104,159,000,000 104,338,000,000 103,232,000,000 101,467,000,000 97,952,000,000 101,103,000,000 97,630,000,000 92,571,000,000 89,643,000,000 89,447,000,000 89,371,000,000 89,527,000,000 89,627,000,000 89,566,000,000 89,672,000,000 89,703,000,000 89,645,000,000 89,509,000,000 89,625,000,000 89,579,000,000 89,559,000,000 89,594,000,000 89,561,000,000  89,347,000,000    89,176,000,000    89,054,000,000  88,902,000,000 88,833,000,000 84,341,000,000 88,766,000,000 80,745,000,000 81,466,000,000 80,494,000,000 80,225,000,000 80,051,000,000 80,156,000,000 77,388,000,000 78,330,000,000 75,935,000,000 75,699,000,000 75,647,000,000 75,541,000,000 75,517,000,000 75,443,000,000 75,350,000,000 75,358,000,000 75,401,000,000 75,337,000,000 75,290,000,000 75,246,000,000 72,852,000,000 75,223,000,000 75,235,000,000 65,607,000,000 62,581,000,000 62,607,000,000 62,588,000,000 62,571,000,000  
      less: net loss attributable to noncontrolling interests
                                                  -1,000,000      -1,000,000  -1,000,000          -1,000,000        
      net income and comprehensive income attributable to portland general electric company
                                             30,250,000 36,000,000   33,000,000 39,000,000  58,000,000 14,500,000 31,000,000 -22,000,000 49,000,000                    
      production and distribution
                                                 45,250,000 60,000,000 67,000,000 54,000,000 56,000,000 54,000,000 64,000,000 51,000,000 58,000,000 49,000,000 51,000,000 53,000,000 54,000,000 50,000,000 55,000,000 42,000,000 46,000,000 39,000,000 51,000,000 42,000,000 43,000,000 42,000,000 44,000,000 40,000,000 46,000,000 39,000,000  
      cascade crossing transmission project
                                                       52,000,000                     
      net income and comprehensive incomeattributable to portland general electric company
                                                   35,000,000                         
      income before income taxes
                                                        65,000,000 49,000,000 56,000,000 35,000,000 64,000,000 45,000,000 38,000,000 31,000,000 91,000,000 32,000,000 37,000,000   29,000,000 37,000,000   56,000,000 39,000,000  
      income taxes
                                                        17,000,000 21,000,000 19,000,000 9,000,000 15,000,000 16,000,000 11,000,000 9,000,000 22,000,000 8,000,000 10,000,000   3,000,000 13,000,000   17,000,000 11,000,000  
      net income attributable to portland general electric company
                                                         28,000,000 38,000,000   29,000,000 27,000,000   24,000,000 27,000,000 8,000,000 32,000,000 24,000,000 31,000,000      
      net income and net income attributable to portland general electric company
                                                           26,000,000 49,000,000   22,000,000 69,000,000            
      comprehensive income and comprehensive income attributable to portland general electric company
                                                           26,000,000 49,000,000                
      earnings per share - basic and diluted
                                                            0.65       0.303 0.43 0.31 0.47 0.31  0.63 0.44  
      less: net income attributable to noncontrolling interests
                                                                     2,000,000       
      less: net losses attributable to the noncontrolling interests
                                                                            
      other expense
                                                                      -1,000,000      
      add: net losses attributable to the noncontrolling interests
                                                                      7,000,000      
      dividends declared per share
                                                                       0.181 0.245 0.245 0.235  
                                                                            
    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 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 2010-06-30 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 
                                                                              
        assets
                                                                              
        current assets:
                                                                              
        cash and cash equivalents
      8,000,000 76,000,000 137,000,000 56,000,000 11,000,000 12,000,000 35,000,000 6,000,000 176,000,000 5,000,000 47,000,000 13,000,000 12,000,000 165,000,000 18,000,000 91,000,000 110,000,000 52,000,000 294,000,000 17,000,000 135,000,000 257,000,000 253,000,000 303,000,000 30,000,000 30,000,000 11,000,000 11,000,000 89,000,000 119,000,000 200,000,000 48,000,000 70,000,000 39,000,000 89,000,000 33,000,000 31,000,000 6,000,000 88,000,000 93,000,000 4,000,000 4,000,000 92,000,000 122,000,000 27,000,000 127,000,000 97,000,000 97,000,000 64,000,000 107,000,000 91,000,000 119,000,000 33,000,000 12,000,000 156,000,000 74,000,000 8,000,000 6,000,000 97,000,000 72,000,000 27,000,000 63,000,000 52,000,000 31,000,000 46,000,000 58,000,000 47,000,000 10,000,000 5,000,000 202,000,000 51,000,000 73,000,000 
        accounts receivable
      405,000,000 460,000,000 455,000,000 397,000,000 473,000,000 456,000,000 459,000,000 385,000,000 412,000,000 414,000,000 364,000,000 310,000,000 362,000,000 398,000,000 345,000,000 289,000,000 303,000,000 329,000,000 273,000,000 274,000,000 268,000,000 271,000,000 250,000,000 204,000,000 233,000,000 167,000,000 161,000,000 150,000,000 226,000,000 193,000,000 189,000,000 162,000,000 152,000,000 168,000,000 151,000,000 139,000,000 162,000,000 155,000,000 140,000,000 124,000,000 130,000,000 158,000,000 133,000,000 122,000,000 129,000,000 149,000,000 156,000,000 121,000,000 158,000,000 146,000,000 137,000,000 137,000,000 144,000,000 152,000,000 129,000,000 133,000,000 156,000,000 144,000,000 136,000,000 134,000,000 156,000,000 128,000,000 150,000,000 159,000,000 137,000,000 150,000,000 168,000,000 168,000,000     
        inventories
      130,000,000  124,000,000 123,000,000 111,000,000  115,000,000 117,000,000 114,000,000  109,000,000 108,000,000 95,000,000  91,000,000 96,000,000 72,000,000  75,000,000 74,000,000 67,000,000  86,000,000 109,000,000 97,000,000  91,000,000 101,000,000 81,000,000  76,000,000 85,000,000 80,000,000  70,000,000 82,000,000 77,000,000  82,000,000 87,000,000 82,000,000  94,000,000 101,000,000 95,000,000  84,000,000 85,000,000 64,000,000  72,000,000 72,000,000 77,000,000  78,000,000 80,000,000 81,000,000  69,000,000 61,000,000 56,000,000 62,000,000 53,000,000  72,000,000 75,000,000       
        regulatory assets—current
      243,000,000 168,000,000 207,000,000 188,000,000 164,000,000 205,000,000 185,000,000 165,000,000 177,000,000 221,000,000 55,000,000 88,000,000 65,000,000 54,000,000 13,000,000 16,000,000 20,000,000 24,000,000 14,000,000 20,000,000 25,000,000 23,000,000 8,000,000 12,000,000 21,000,000 17,000,000 26,000,000 37,000,000 21,000,000 61,000,000 42,000,000 56,000,000 72,000,000 62,000,000 42,000,000 47,000,000 57,000,000 36,000,000 65,000,000 74,000,000 131,000,000 129,000,000 122,000,000 117,000,000 125,000,000 133,000,000 56,000,000 38,000,000 55,000,000 66,000,000 99,000,000 114,000,000 96,000,000 144,000,000 154,000,000 197,000,000  216,000,000      197,000,000         
        other current assets
      224,000,000 244,000,000 136,000,000 126,000,000 215,000,000 238,000,000 156,000,000 175,000,000 203,000,000 182,000,000 149,000,000 157,000,000 232,000,000 498,000,000 283,000,000 310,000,000 371,000,000 205,000,000 243,000,000 219,000,000 127,000,000 98,000,000 123,000,000 108,000,000 124,000,000 104,000,000 54,000,000 69,000,000 108,000,000 90,000,000 51,000,000 56,000,000 81,000,000 73,000,000 43,000,000 43,000,000 87,000,000 77,000,000 41,000,000 64,000,000 113,000,000 88,000,000 92,000,000 97,000,000 133,000,000 115,000,000 76,000,000 98,000,000 114,000,000 94,000,000 63,000,000 78,000,000 105,000,000 93,000,000 99,000,000 66,000,000 87,000,000 98,000,000 75,000,000 64,000,000 81,000,000 46,000,000 129,000,000 94,000,000 44,000,000 29,000,000 57,000,000 44,000,000 66,000,000 63,000,000 53,000,000 67,000,000 
        total current assets
      1,010,000,000 1,072,000,000 1,059,000,000 890,000,000 974,000,000 1,025,000,000 950,000,000 848,000,000 1,082,000,000 935,000,000 724,000,000 676,000,000 766,000,000 1,210,000,000 750,000,000 802,000,000 876,000,000 688,000,000 899,000,000 604,000,000 622,000,000 721,000,000 720,000,000 736,000,000 505,000,000 500,000,000 416,000,000 440,000,000 596,000,000 643,000,000 631,000,000 493,000,000 532,000,000 526,000,000 466,000,000 412,000,000 485,000,000 463,000,000 476,000,000 512,000,000 537,000,000 557,000,000 605,000,000 646,000,000 584,000,000 699,000,000 542,000,000 513,000,000 549,000,000 591,000,000 565,000,000 627,000,000 564,000,000 622,000,000 784,000,000 728,000,000 780,000,000 716,000,000 740,000,000 651,000,000 689,000,000 685,000,000 794,000,000 690,000,000 765,000,000 892,000,000 940,000,000 768,000,000 627,000,000 1,068,000,000 678,000,000 538,000,000 
        electric utility plant
      11,103,000,000 10,993,000,000 10,804,000,000 10,645,000,000 10,534,000,000 10,345,000,000 10,075,000,000 9,873,000,000 9,663,000,000 9,546,000,000 9,078,000,000 8,841,000,000 8,611,000,000 8,465,000,000 8,292,000,000 8,164,000,000 8,062,000,000 8,005,000,000 7,773,000,000 7,693,000,000 7,616,000,000 7,539,000,000 7,371,000,000 7,301,000,000 7,217,000,000 7,161,000,000 7,014,000,000 6,952,000,000 6,747,000,000 6,887,000,000 6,782,000,000 6,840,000,000 6,781,000,000 6,741,000,000 6,638,000,000 6,573,000,000 6,466,000,000 6,434,000,000 6,340,000,000 6,284,000,000 6,160,000,000 6,012,000,000 5,920,000,000 5,874,000,000 5,789,000,000 5,679,000,000 5,553,000,000 5,324,000,000 5,009,000,000 4,880,000,000 4,659,000,000 4,532,000,000 4,449,000,000 4,392,000,000 4,351,000,000 4,317,000,000 4,288,000,000 4,285,000,000 4,255,000,000 4,227,000,000 4,179,000,000 4,052,000,000 3,964,000,000 3,858,000,000 3,800,000,000 3,662,000,000 3,440,000,000 3,301,000,000 3,236,000,000 3,188,000,000 3,147,000,000 3,066,000,000 
        regulatory assets—noncurrent
      552,000,000 619,000,000 599,000,000 581,000,000 633,000,000 632,000,000 619,000,000 617,000,000 606,000,000 492,000,000 546,000,000 593,000,000 481,000,000 473,000,000 506,000,000 498,000,000 491,000,000 533,000,000 567,000,000 543,000,000 591,000,000 569,000,000 527,000,000 526,000,000 513,000,000 483,000,000 483,000,000 380,000,000 380,000,000 401,000,000 426,000,000 441,000,000 448,000,000 438,000,000 526,000,000 536,000,000 532,000,000 498,000,000 515,000,000 525,000,000 526,000,000 524,000,000 547,000,000 552,000,000 545,000,000 494,000,000 396,000,000 399,000,000 448,000,000 464,000,000 504,000,000 519,000,000 524,000,000 524,000,000 490,000,000 528,000,000  594,000,000      465,000,000         
        nuclear decommissioning trust
      40,000,000 42,000,000 44,000,000 42,000,000 44,000,000 30,000,000 35,000,000 33,000,000 30,000,000 31,000,000 34,000,000 35,000,000 38,000,000 39,000,000 39,000,000 43,000,000 44,000,000 47,000,000 43,000,000 43,000,000 44,000,000 45,000,000 47,000,000 47,000,000 45,000,000 46,000,000 46,000,000 46,000,000 46,000,000 42,000,000 42,000,000 42,000,000 42,000,000 42,000,000 41,000,000 41,000,000 41,000,000 41,000,000 41,000,000 41,000,000 41,000,000 40,000,000 40,000,000 40,000,000 90,000,000 90,000,000 89,000,000 83,000,000 83,000,000 82,000,000 82,000,000 37,000,000 38,000,000 38,000,000 37,000,000 37,000,000 36,000,000 37,000,000 37,000,000 36,000,000 34,000,000 33,000,000 32,000,000 50,000,000 49,000,000 47,000,000 46,000,000 46,000,000 45,000,000 45,000,000 46,000,000  
        non-qualified benefit plan trust
      35,000,000 36,000,000 36,000,000 35,000,000 34,000,000 34,000,000 36,000,000 36,000,000 36,000,000 35,000,000 33,000,000 36,000,000 38,000,000 38,000,000 37,000,000 38,000,000 42,000,000 45,000,000 44,000,000 46,000,000 43,000,000 42,000,000 39,000,000 37,000,000 34,000,000 38,000,000 37,000,000 37,000,000 37,000,000 36,000,000 39,000,000 38,000,000 36,000,000 37,000,000 37,000,000 36,000,000 34,000,000 34,000,000 34,000,000 33,000,000 32,000,000 33,000,000 33,000,000 35,000,000 34,000,000 32,000,000 33,000,000 33,000,000 33,000,000 35,000,000 34,000,000 32,000,000 32,000,000 32,000,000 32,000,000 34,000,000 36,000,000 36,000,000 36,000,000 42,000,000 44,000,000 42,000,000 47,000,000 47,000,000 48,000,000 45,000,000 41,000,000 46,000,000 56,000,000 62,000,000 63,000,000 69,000,000 
        other noncurrent assets
      464,000,000 468,000,000 472,000,000 488,000,000 476,000,000 478,000,000 166,000,000 175,000,000 171,000,000 169,000,000 188,000,000 189,000,000 217,000,000 234,000,000 225,000,000 238,000,000 208,000,000 176,000,000 216,000,000 170,000,000 153,000,000 153,000,000 165,000,000 158,000,000 156,000,000 166,000,000 158,000,000 142,000,000 142,000,000 101,000,000 55,000,000 55,000,000 53,000,000 54,000,000 51,000,000 55,000,000 54,000,000 57,000,000 49,000,000 51,000,000 48,000,000 55,000,000 52,000,000 51,000,000 49,000,000 48,000,000 44,000,000 47,000,000 47,000,000 49,000,000 47,000,000 49,000,000 54,000,000 62,000,000 63,000,000 58,000,000 61,000,000 65,000,000 62,000,000 66,000,000 77,000,000 68,000,000 67,000,000 62,000,000 56,000,000 53,000,000 41,000,000 37,000,000 84,000,000 82,000,000 66,000,000 66,000,000 
        total assets
      13,204,000,000 13,230,000,000 13,014,000,000 12,681,000,000 12,695,000,000 12,544,000,000 11,881,000,000 11,582,000,000 11,588,000,000 11,208,000,000 10,603,000,000 10,370,000,000 10,151,000,000 10,459,000,000 9,849,000,000 9,783,000,000 9,723,000,000 9,494,000,000 9,542,000,000 9,099,000,000 9,069,000,000 9,069,000,000 8,869,000,000 8,805,000,000 8,470,000,000 8,394,000,000 8,154,000,000 7,997,000,000 7,948,000,000 8,110,000,000 7,975,000,000 7,909,000,000 7,892,000,000 7,838,000,000 7,759,000,000 7,653,000,000 7,612,000,000 7,527,000,000 7,455,000,000 7,446,000,000 7,344,000,000 7,221,000,000 7,197,000,000 7,198,000,000 7,091,000,000 7,042,000,000 6,657,000,000 6,399,000,000 6,169,000,000 6,101,000,000 5,891,000,000 5,796,000,000 5,661,000,000 5,670,000,000 5,757,000,000 5,702,000,000 5,789,000,000 5,733,000,000 5,611,000,000 5,503,000,000 5,535,000,000 5,404,000,000 5,436,000,000 5,172,000,000 5,252,000,000 5,284,000,000 5,187,000,000 5,023,000,000 4,475,000,000 4,694,000,000 4,269,000,000 4,108,000,000 
        liabilities and shareholders’ equity
                                                                              
        current liabilities:
                                                                              
        accounts payable
      277,000,000 330,000,000 276,000,000 267,000,000 281,000,000 365,000,000 351,000,000 259,000,000 289,000,000 347,000,000 187,000,000 227,000,000 242,000,000 457,000,000 287,000,000 191,000,000 169,000,000 244,000,000 201,000,000 196,000,000 199,000,000 153,000,000 139,000,000 134,000,000 128,000,000 165,000,000 128,000,000 119,000,000 136,000,000 168,000,000 110,000,000 103,000,000 97,000,000 132,000,000 100,000,000 90,000,000 92,000,000 129,000,000 112,000,000 114,000,000 98,000,000 98,000,000 96,000,000 125,000,000 137,000,000 156,000,000 157,000,000 181,000,000 147,000,000 173,000,000 99,000,000 107,000,000 77,000,000 98,000,000 76,000,000 66,000,000 80,000,000 111,000,000               
        liabilities from price risk management activities—current
      167,000,000 158,000,000 133,000,000 112,000,000 109,000,000 147,000,000 114,000,000 142,000,000 137,000,000 164,000,000 73,000,000 98,000,000 100,000,000 118,000,000 68,000,000 55,000,000 60,000,000 47,000,000 39,000,000 55,000,000 20,000,000 14,000,000 16,000,000 40,000,000 32,000,000 23,000,000 26,000,000 40,000,000 32,000,000 55,000,000 42,000,000 51,000,000 67,000,000 59,000,000 43,000,000 46,000,000 59,000,000 44,000,000 66,000,000 81,000,000 142,000,000 130,000,000 115,000,000 101,000,000 107,000,000 106,000,000 44,000,000 32,000,000 52,000,000 49,000,000 89,000,000 103,000,000 91,000,000 127,000,000 147,000,000 193,000,000  216,000,000      128,000,000         
        short-term debt
      9,000,000         146,000,000  140,000,000 68,000,000  40,000,000     200,000,000 200,000,000 150,000,000 225,000,000 150,000,000 20,000,000   17,000,000              6,000,000            17,000,000    30,000,000          203,000,000     
        current portion of finance lease obligation
      27,000,000  27,000,000 27,000,000 27,000,000  26,000,000 24,000,000 23,000,000  20,000,000 20,000,000 20,000,000  21,000,000 21,000,000 22,000,000  16,000,000 16,000,000 16,000,000  16,000,000 16,000,000 16,000,000  17,000,000 17,000,000                                             
        accrued expenses and other current liabilities
      449,000,000 478,000,000 481,000,000 439,000,000 437,000,000 410,000,000 401,000,000 345,000,000 356,000,000 355,000,000 356,000,000 276,000,000 321,000,000 641,000,000 574,000,000 653,000,000 680,000,000 457,000,000 611,000,000 369,000,000 319,000,000 322,000,000 368,000,000 289,000,000 296,000,000 315,000,000 293,000,000 247,000,000 263,000,000 268,000,000 251,000,000 225,000,000 229,000,000 241,000,000 248,000,000 226,000,000 247,000,000 254,000,000 270,000,000 247,000,000 268,000,000 259,000,000 254,000,000 228,000,000 243,000,000 236,000,000 211,000,000 174,000,000 182,000,000 171,000,000 192,000,000 175,000,000 192,000,000 179,000,000 225,000,000 157,000,000 166,000,000 151,000,000               
        total current liabilities
      929,000,000 993,000,000 985,000,000 913,000,000 922,000,000 1,119,000,000 972,000,000 850,000,000 885,000,000 1,112,000,000 636,000,000 761,000,000 751,000,000 1,496,000,000 990,000,000 920,000,000 931,000,000 768,000,000 867,000,000 856,000,000 774,000,000 815,000,000 924,000,000 769,000,000 632,000,000 519,000,000 514,000,000 440,000,000 731,000,000 791,000,000 703,000,000 679,000,000 393,000,000 432,000,000 491,000,000 512,000,000 548,000,000 577,000,000 448,000,000 442,000,000 508,000,000 626,000,000 465,000,000 509,000,000 809,000,000 873,000,000 482,000,000 457,000,000 451,000,000 393,000,000 380,000,000 435,000,000 460,000,000 521,000,000 648,000,000 566,000,000 588,000,000 614,000,000 511,000,000 423,000,000 447,000,000 424,000,000 535,000,000 620,000,000 747,000,000 764,000,000 839,000,000 1,047,000,000 721,000,000 794,000,000 489,000,000 391,000,000 
        long-term debt
      4,658,000,000 4,662,000,000 4,662,000,000 4,663,000,000 4,663,000,000 4,354,000,000 4,354,000,000 4,353,000,000 4,353,000,000 3,905,000,000 3,786,000,000 3,486,000,000 3,485,000,000 3,386,000,000 3,286,000,000 3,286,000,000 3,286,000,000 3,285,000,000 3,285,000,000 2,887,000,000 2,886,000,000 2,886,000,000 2,657,000,000 2,676,000,000 2,478,000,000 2,597,000,000 2,328,000,000 2,377,000,000 2,178,000,000 2,178,000,000 2,127,000,000 2,126,000,000 2,426,000,000 2,426,000,000 2,277,000,000 2,200,000,000 2,200,000,000 2,200,000,000 2,325,000,000 2,324,000,000 2,199,000,000 2,071,000,000 2,204,000,000 2,204,000,000 2,134,000,000 2,126,000,000 2,251,000,000 2,071,000,000 1,846,000,000 1,916,000,000 1,761,000,000 1,686,000,000 1,536,000,000 1,536,000,000 1,536,000,000 1,586,000,000 1,635,000,000 1,635,000,000 1,798,000,000 1,798,000,000 1,798,000,000 1,808,000,000 1,750,000,000 1,558,000,000 1,408,000,000 1,408,000,000 1,287,000,000 1,164,000,000 1,164,000,000 1,164,000,000 1,256,000,000 1,313,000,000 
        regulatory liabilities—noncurrent
      1,503,000,000 1,490,000,000 1,491,000,000 1,420,000,000 1,412,000,000 1,440,000,000 1,413,000,000 1,406,000,000 1,406,000,000 1,398,000,000 1,418,000,000 1,409,000,000 1,398,000,000 1,389,000,000 1,402,000,000 1,418,000,000 1,379,000,000 1,360,000,000 1,370,000,000 1,354,000,000 1,353,000,000 1,369,000,000 1,375,000,000 1,362,000,000 1,390,000,000 1,377,000,000 1,380,000,000 1,365,000,000 1,356,000,000 1,355,000,000 1,379,000,000 1,348,000,000 1,323,000,000 1,288,000,000 1,002,000,000 989,000,000 973,000,000 958,000,000 958,000,000 949,000,000 938,000,000 928,000,000 939,000,000 923,000,000 911,000,000 906,000,000 940,000,000 913,000,000 899,000,000 865,000,000 852,000,000 796,000,000 782,000,000 765,000,000 760,000,000 755,000,000  720,000,000      654,000,000         
        deferred income taxes
      623,000,000 601,000,000 572,000,000 606,000,000 595,000,000 564,000,000 552,000,000 540,000,000 534,000,000 488,000,000 445,000,000 452,000,000 447,000,000 439,000,000 435,000,000 432,000,000 422,000,000 413,000,000 419,000,000 402,000,000 391,000,000 374,000,000 378,000,000 385,000,000 385,000,000 378,000,000 378,000,000 379,000,000 380,000,000 369,000,000 372,000,000 378,000,000 378,000,000 376,000,000 701,000,000 685,000,000 682,000,000 669,000,000 644,000,000 649,000,000 646,000,000 632,000,000 664,000,000 648,000,000 636,000,000 625,000,000 626,000,000 613,000,000 605,000,000 586,000,000 565,000,000 571,000,000 586,000,000 588,000,000 598,000,000 573,000,000 557,000,000 529,000,000 480,000,000 483,000,000 469,000,000 447,000,000 426,000,000 356,000,000   327,000,000 438,000,000 68,000,000 147,000,000 40,000,000 279,000,000 
        deferred investment tax credits
      193,000,000 194,000,000 195,000,000 65,000,000 59,000,000 61,000,000                                                                   
        unfunded status of pension and postretirement plans
      93,000,000 107,000,000 128,000,000 133,000,000 137,000,000 140,000,000 161,000,000 160,000,000 160,000,000 172,000,000 172,000,000 171,000,000 170,000,000 170,000,000 204,000,000 205,000,000 206,000,000 206,000,000 299,000,000 299,000,000 299,000,000 299,000,000 250,000,000 249,000,000 248,000,000 247,000,000 307,000,000 312,000,000 309,000,000 307,000,000 283,000,000 280,000,000 282,000,000 284,000,000 288,000,000 286,000,000 283,000,000 281,000,000 267,000,000 264,000,000 261,000,000 259,000,000 246,000,000 243,000,000 239,000,000 237,000,000 163,000,000 160,000,000 157,000,000 154,000,000 253,000,000 251,000,000 249,000,000 247,000,000 201,000,000 199,000,000 197,000,000 195,000,000 102,000,000 115,000,000 140,000,000 145,000,000 144,000,000 143,000,000 177,000,000 176,000,000 174,000,000 174,000,000     
        liabilities from price risk management activities—noncurrent
      73,000,000 56,000,000 43,000,000 43,000,000 67,000,000 72,000,000 74,000,000 58,000,000 56,000,000 75,000,000 120,000,000 159,000,000 70,000,000 75,000,000 62,000,000 67,000,000 72,000,000 90,000,000 89,000,000 69,000,000 118,000,000 136,000,000 138,000,000 145,000,000 129,000,000 108,000,000 100,000,000 76,000,000 78,000,000 101,000,000 124,000,000 136,000,000 144,000,000 151,000,000 150,000,000 158,000,000 156,000,000 125,000,000 163,000,000 171,000,000 161,000,000 161,000,000 184,000,000 187,000,000 176,000,000 122,000,000 78,000,000 83,000,000 126,000,000 141,000,000 71,000,000 78,000,000 78,000,000 73,000,000 90,000,000 120,000,000  172,000,000      127,000,000         
        asset retirement obligations
      301,000,000 299,000,000 293,000,000 293,000,000 293,000,000 292,000,000 273,000,000 274,000,000 273,000,000 272,000,000 261,000,000 263,000,000 250,000,000 257,000,000 234,000,000 244,000,000 243,000,000 238,000,000 241,000,000 263,000,000 270,000,000 270,000,000 251,000,000 265,000,000 263,000,000 263,000,000 268,000,000 199,000,000 198,000,000 197,000,000 196,000,000 192,000,000 191,000,000 167,000,000 166,000,000 165,000,000 164,000,000 161,000,000 156,000,000 155,000,000 152,000,000 151,000,000 137,000,000 135,000,000 119,000,000 116,000,000 107,000,000 105,000,000 101,000,000 100,000,000 96,000,000 96,000,000 93,000,000 94,000,000              58,000,000     
        non-qualified benefit plan liabilities
      68,000,000 70,000,000 70,000,000 71,000,000 73,000,000 74,000,000 76,000,000 76,000,000 78,000,000 79,000,000 78,000,000 79,000,000 81,000,000 83,000,000 91,000,000 92,000,000 93,000,000 95,000,000 97,000,000 100,000,000 101,000,000 101,000,000 99,000,000 101,000,000 102,000,000 103,000,000 100,000,000 101,000,000 103,000,000 103,000,000 106,000,000 107,000,000 108,000,000 106,000,000 105,000,000 106,000,000 106,000,000 105,000,000 105,000,000 106,000,000 106,000,000 106,000,000 105,000,000 105,000,000 106,000,000 105,000,000 101,000,000 101,000,000 102,000,000 101,000,000 103,000,000 103,000,000 103,000,000 102,000,000 102,000,000 102,000,000 102,000,000 101,000,000 99,000,000 98,000,000 98,000,000 97,000,000 96,000,000 96,000,000 94,000,000 94,000,000 93,000,000 91,000,000 89,000,000 89,000,000 88,000,000 86,000,000 
        finance lease obligations, net of current portion
      259,000,000 263,000,000 266,000,000 270,000,000 273,000,000 276,000,000 279,000,000 283,000,000 285,000,000 289,000,000 291,000,000 292,000,000 293,000,000 294,000,000 296,000,000 297,000,000 299,000,000 273,000,000 125,000,000 127,000,000 128,000,000 129,000,000 131,000,000 132,000,000 133,000,000 135,000,000 136,000,000 137,000,000                                             
        other noncurrent liabilities
      384,000,000 362,000,000 359,000,000 352,000,000 357,000,000 358,000,000 97,000,000 98,000,000 99,000,000 99,000,000 101,000,000 98,000,000 94,000,000 91,000,000 89,000,000 84,000,000 83,000,000 59,000,000 75,000,000 81,000,000 74,000,000 77,000,000 71,000,000 75,000,000 72,000,000 76,000,000 79,000,000 69,000,000 67,000,000 203,000,000 199,000,000 198,000,000 198,000,000 192,000,000 177,000,000 160,000,000 113,000,000 107,000,000 79,000,000 83,000,000 82,000,000 29,000,000 21,000,000 23,000,000 22,000,000 21,000,000 20,000,000 24,000,000 25,000,000 25,000,000 17,000,000 18,000,000 16,000,000 14,000,000 103,000,000 100,000,000 100,000,000 101,000,000 106,000,000 103,000,000 103,000,000 78,000,000 80,000,000 75,000,000 72,000,000 71,000,000 74,000,000 14,000,000 59,000,000 58,000,000 57,000,000 58,000,000 
        total liabilities
      9,084,000,000 9,097,000,000 9,064,000,000 8,829,000,000 8,851,000,000 8,750,000,000 8,251,000,000 8,098,000,000 8,129,000,000 7,889,000,000 7,308,000,000 7,170,000,000 7,039,000,000 7,680,000,000 7,089,000,000 7,045,000,000 7,014,000,000 6,787,000,000 6,867,000,000 6,438,000,000 6,394,000,000 6,456,000,000 6,274,000,000 6,159,000,000 5,832,000,000 5,803,000,000 5,590,000,000 5,455,000,000 5,400,000,000 5,604,000,000 5,489,000,000 5,444,000,000 5,443,000,000 5,422,000,000 5,357,000,000 5,261,000,000 5,225,000,000 5,183,000,000 5,145,000,000 5,143,000,000 5,053,000,000 4,963,000,000 4,965,000,000 4,977,000,000 5,152,000,000 5,131,000,000 4,768,000,000 4,527,000,000 4,312,000,000 4,281,000,000 4,098,000,000 4,034,000,000 3,903,000,000 3,940,000,000 4,038,000,000 4,001,000,000 4,094,000,000 4,067,000,000 3,955,000,000 3,855,000,000 3,890,000,000 3,847,000,000 3,884,000,000 3,629,000,000 3,697,000,000 3,740,000,000 3,650,000,000 3,669,000,000 3,121,000,000 3,339,000,000 2,939,000,000 1,479,000,000 
        commitments and contingencies
                                                                              
        shareholders’ equity:
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2026 and december 31, 2025
                                                                              
        common stock
      2,386,000,000 2,382,000,000 2,179,000,000 2,127,000,000 2,123,000,000 2,118,000,000 1,938,000,000 1,833,000,000 1,828,000,000 1,750,000,000 1,744,000,000 1,647,000,000 1,548,000,000 1,249,000,000 1,245,000,000 1,241,000,000 1,236,000,000 1,241,000,000 1,237,000,000 1,235,000,000 1,233,000,000 1,231,000,000 1,226,000,000 1,224,000,000 1,220,000,000 1,220,000,000 1,217,000,000 1,215,000,000 1,212,000,000 1,212,000,000 1,209,000,000 1,208,000,000 1,206,000,000 1,207,000,000 1,204,000,000 1,203,000,000 1,200,000,000 1,201,000,000 1,199,000,000 1,198,000,000 1,195,000,000 1,196,000,000 1,193,000,000 1,191,000,000 918,000,000 918,000,000 916,000,000 914,000,000 912,000,000 911,000,000 910,000,000 889,000,000 841,000,000 841,000,000 838,000,000 837,000,000 836,000,000 836,000,000 833,000,000 832,000,000 832,000,000 830,000,000 829,000,000 829,000,000 829,000,000 830,000,000 829,000,000 659,000,000 662,000,000 648,000,000 647,000,000 646,000,000 
        accumulated other comprehensive loss
      -4,000,000 -4,000,000 -3,000,000 -4,000,000 -4,000,000 -4,000,000 -5,000,000 -4,000,000 -4,000,000 -5,000,000 -3,000,000 -3,000,000 -4,000,000 -4,000,000 -9,000,000 -9,000,000 -10,000,000 -10,000,000 -10,000,000 -11,000,000 -11,000,000 -11,000,000 -9,000,000 -9,000,000 -9,000,000 -10,000,000 -7,000,000 -7,000,000 -8,000,000 -7,000,000 -8,000,000 -8,000,000 -8,000,000 -8,000,000 -7,000,000 -7,000,000 -8,000,000 -7,000,000 -7,000,000 -8,000,000 -8,000,000 -8,000,000 -7,000,000 -7,000,000 -7,000,000 -7,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -6,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -4,000,000 -4,000,000  -4,000,000 
        retained earnings
      1,738,000,000 1,755,000,000 1,774,000,000 1,729,000,000 1,725,000,000 1,680,000,000 1,697,000,000 1,655,000,000 1,635,000,000 1,574,000,000 1,554,000,000 1,556,000,000 1,568,000,000 1,534,000,000 1,524,000,000 1,506,000,000 1,483,000,000 1,476,000,000 1,448,000,000 1,437,000,000 1,453,000,000 1,393,000,000 1,378,000,000 1,431,000,000 1,427,000,000 1,381,000,000 1,354,000,000 1,334,000,000 1,344,000,000 1,301,000,000 1,285,000,000 1,265,000,000 1,251,000,000 1,217,000,000 1,205,000,000 1,196,000,000 1,195,000,000 1,150,000,000 1,118,000,000 1,113,000,000 1,104,000,000 1,070,000,000 1,046,000,000 1,037,000,000 1,028,000,000 1,000,000,000 978,000,000 962,000,000 949,000,000 913,000,000 888,000,000 878,000,000 922,000,000 893,000,000 885,000,000 867,000,000 862,000,000 833,000,000 825,000,000 818,000,000 815,000,000 731,000,000 727,000,000 719,000,000 730,000,000 717,000,000 713,000,000 700,000,000 696,000,000 711,000,000 687,000,000 674,000,000 
        total shareholders’ equity
      4,120,000,000 4,133,000,000 3,950,000,000 3,852,000,000 3,844,000,000 3,794,000,000 3,630,000,000 3,484,000,000 3,459,000,000 3,319,000,000 3,295,000,000 3,200,000,000 3,112,000,000 2,779,000,000 2,760,000,000 2,738,000,000 2,709,000,000 2,707,000,000 2,675,000,000 2,661,000,000 2,675,000,000 2,613,000,000 2,595,000,000 2,646,000,000 2,638,000,000 2,591,000,000 2,564,000,000 2,542,000,000 2,548,000,000 2,506,000,000                                   1,555,000,000 1,544,000,000 1,537,000,000 1,354,000,000 1,354,000,000 1,355,000,000 1,330,000,000 1,316,000,000 
        total liabilities and shareholders’ equity
      13,204,000,000 13,230,000,000 13,014,000,000 12,681,000,000 12,695,000,000 12,544,000,000 11,881,000,000 11,582,000,000 11,588,000,000 11,208,000,000 10,603,000,000 10,370,000,000 10,151,000,000 10,459,000,000 9,849,000,000 9,783,000,000 9,723,000,000 9,494,000,000 9,542,000,000 9,099,000,000 9,069,000,000 9,069,000,000 8,869,000,000 8,805,000,000 8,470,000,000 8,394,000,000 8,154,000,000 7,997,000,000 7,948,000,000 8,110,000,000                                   5,252,000,000 5,284,000,000 5,187,000,000 5,023,000,000 4,475,000,000 4,694,000,000 4,269,000,000  
        inventories, at average cost:
                                                                              
        materials and supplies
       99,000,000    92,000,000    83,000,000    63,000,000    51,000,000    49,000,000    56,000,000    53,000,000    52,000,000    50,000,000    44,000,000    42,000,000    41,000,000    38,000,000    37,000,000      34,000,000    36,000,000     
        fuel
       25,000,000    22,000,000    30,000,000    32,000,000    27,000,000    23,000,000    40,000,000    31,000,000    26,000,000    32,000,000    39,000,000    40,000,000    24,000,000    40,000,000    34,000,000      24,000,000    35,000,000     
        electric utility plant:
                                                                              
        in service
       15,996,000,000    14,863,000,000    13,329,000,000    12,421,000,000    11,838,000,000    10,974,000,000    10,928,000,000                                               
        accumulated depreciation and amortization
       -5,419,000,000    -5,085,000,000    -4,757,000,000    -4,423,000,000    -4,146,000,000    -3,864,000,000    -4,095,000,000    -3,803,000,000    -3,564,000,000    -3,313,000,000    -3,093,000,000    -2,899,000,000    -2,723,000,000    -2,559,000,000    -2,431,000,000      -2,144,000,000    -2,049,000,000     
        construction work-in-progress
       416,000,000    567,000,000    974,000,000    467,000,000    313,000,000    429,000,000    328,000,000    346,000,000    391,000,000    213,000,000    545,000,000    417,000,000    508,000,000                       
        current portion of long-term debt
        68,000,000 68,000,000 68,000,000 170,000,000 80,000,000 80,000,000 80,000,000 80,000,000    260,000,000      20,000,000 20,000,000 160,000,000 160,000,000 140,000,000 140,000,000  50,000,000  300,000,000 300,000,000 300,000,000 300,000,000   100,000,000 150,000,000 150,000,000 150,000,000    133,000,000  55,000,000 322,000,000 375,000,000 70,000,000 70,000,000 70,000,000   50,000,000 100,000,000 100,000,000 200,000,000 150,000,000 100,000,000 100,000,000     37,000,000 186,000,000 186,000,000 186,000,000 149,000,000 142,000,000 142,000,000 142,000,000   
        current portion of finance lease obligations
       27,000,000    27,000,000    20,000,000    20,000,000    20,000,000    16,000,000    16,000,000                                               
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding
                                                                              
        see accompanying notes to condensed consolidated financial statements.
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2025 and december 31, 2024
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2025 and december 31, 2024
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2025 and december 31, 2024
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2024 and december 31, 2023
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2024 and december 31, 2023
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2024 and december 31, 2023
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2023 and december 31, 2022
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2023 and december 31, 2022
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2023 and december 31, 2022
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2022 and december 31, 2021
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2022 and december 31, 2021
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2022 and december 31, 2021
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2021 and december 31, 2020
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2021 and december 31, 2020
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2021 and december 31, 2020
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2020 and december 31, 2019
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2020 and december 31, 2019
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2020 and december 31, 2019
                                                                              
        unbilled revenues
                               86,000,000 73,000,000 72,000,000 71,000,000 96,000,000 73,000,000 86,000,000 77,000,000 106,000,000 71,000,000 68,000,000 71,000,000 107,000,000 60,000,000 70,000,000 77,000,000 95,000,000 72,000,000 87,000,000 75,000,000 93,000,000 73,000,000 74,000,000 77,000,000 104,000,000 67,000,000 73,000,000 76,000,000 97,000,000 75,000,000 70,000,000 79,000,000 101,000,000 72,000,000 68,000,000 75,000,000 67,000,000 71,000,000 95,000,000 66,000,000 63,000,000 77,000,000 96,000,000 62,000,000 66,000,000 79,000,000 92,000,000 
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2019 and december 31, 2018
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2019 and december 31, 2018
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2019 and december 31, 2018
                                                                              
        generation
                                   4,600,000,000    4,667,000,000    4,597,000,000    3,898,000,000    3,742,000,000                           
        transmission
                                   580,000,000    547,000,000    521,000,000    451,000,000    440,000,000    417,000,000    412,000,000    393,000,000      364,000,000    351,000,000     
        distribution
                                   3,838,000,000    3,543,000,000    3,343,000,000    3,192,000,000    3,075,000,000    2,943,000,000    2,816,000,000    2,704,000,000      2,472,000,000    2,307,000,000     
        general
                                   611,000,000    550,000,000    501,000,000    463,000,000    426,000,000    381,000,000    327,000,000    314,000,000      277,000,000    259,000,000     
        intangible
                                   715,000,000    607,000,000    572,000,000    556,000,000    478,000,000    386,000,000    357,000,000    331,000,000      214,000,000    206,000,000     
        total electric utility plant
                                   10,690,000,000    10,305,000,000    9,747,000,000    9,105,000,000    8,578,000,000    7,603,000,000    6,951,000,000    6,716,000,000      6,002,000,000    5,350,000,000     
        liabilities and equity
                                                                              
        equity:
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2018 and december 31, 2017
                                                                              
        total equity
                                    2,486,000,000 2,465,000,000 2,449,000,000 2,416,000,000 2,402,000,000 2,392,000,000 2,387,000,000 2,344,000,000 2,310,000,000 2,303,000,000 2,291,000,000 2,258,000,000 2,232,000,000 2,221,000,000 1,939,000,000 1,911,000,000 1,889,000,000 1,872,000,000 1,857,000,000 1,820,000,000 1,793,000,000 1,762,000,000 1,758,000,000 1,730,000,000 1,719,000,000 1,701,000,000 1,695,000,000 1,666,000,000 1,656,000,000 1,648,000,000 1,645,000,000 1,557,000,000 1,552,000,000 1,543,000,000         
        total liabilities and equity
                                    7,975,000,000 7,909,000,000 7,892,000,000 7,838,000,000 7,759,000,000 7,653,000,000 7,612,000,000 7,527,000,000 7,455,000,000 7,446,000,000 7,344,000,000 7,221,000,000 7,197,000,000 7,198,000,000 7,091,000,000 7,042,000,000 6,657,000,000 6,399,000,000 6,169,000,000 6,101,000,000 5,891,000,000 5,796,000,000 5,661,000,000 5,670,000,000 5,757,000,000 5,702,000,000 5,789,000,000 5,733,000,000 5,611,000,000 5,503,000,000 5,535,000,000 5,404,000,000 5,436,000,000 5,172,000,000         
        portland general electric company shareholders’ equity:
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2018 and december 31, 2017
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2018 and december 31, 2017
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2017 and december 31, 2016
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2017 and december 31, 2016
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2017 and december 31, 2016
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2016 and december 31, 2015
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2016 and december 31, 2015
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2016 and december 31, 2015
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2015 and december 31, 2014
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2015 and december 31, 2014
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2015 and december 31, 2014
                                                                              
        total portland general electric company shareholders’ equity
                                                   1,911,000,000 1,889,000,000 1,871,000,000 1,856,000,000 1,819,000,000 1,792,000,000 1,761,000,000 1,757,000,000 1,728,000,000 1,717,000,000 1,698,000,000 1,692,000,000 1,663,000,000 1,653,000,000 1,645,000,000 1,642,000,000 1,556,000,000 1,551,000,000 1,542,000,000 1,554,000,000 1,542,000,000 1,537,000,000      
        noncontrolling interests’ equity
                                                     1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 2,000,000 2,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 1,000,000 1,000,000 1,000,000 1,000,000 2,000,000       
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2014 and december 31, 2013
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2014 and december 31, 2013
                                                                              
        margin deposits
                                                      17,000,000 9,000,000 36,000,000 34,000,000 33,000,000 46,000,000 53,000,000 69,000,000 98,000,000 80,000,000 83,000,000 68,000,000 80,000,000 77,000,000 89,000,000 56,000,000 86,000,000 127,000,000 205,000,000 189,000,000 145,000,000    
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2014 and december 31, 2013
                                                                              
        production
                                                       2,968,000,000    2,899,000,000    2,854,000,000      2,269,000,000    1,943,000,000     
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2013 and december 31, 2012
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2013 and december 31, 2012
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2013 and december 31, 2012
                                                                              
        construction work in progress
                                                           140,000,000    120,000,000      406,000,000    284,000,000     
        deferred income tax assets
                                                            40,000,000 39,000,000 39,000,000                
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2012 and december 31, 2011
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2012 and december 31, 2011
                                                                              
        regulatory assets - current
                                                              232,000,000  208,000,000 184,000,000 214,000,000 183,000,000 202,000,000  200,000,000 244,000,000 235,000,000      
        regulatory assets - noncurrent
                                                              588,000,000  481,000,000 481,000,000 512,000,000 524,000,000 532,000,000  534,000,000 585,000,000 679,000,000      
        liabilities from price risk management activities - current
                                                              242,000,000  196,000,000 163,000,000 183,000,000 172,000,000 180,000,000  187,000,000 254,000,000 286,000,000      
        regulatory liabilities - noncurrent
                                                              742,000,000  712,000,000 692,000,000 668,000,000 665,000,000 651,000,000  658,000,000 645,000,000 613,000,000      
        liabilities from price risk management activities - noncurrent
                                                              173,000,000  147,000,000 143,000,000 167,000,000 183,000,000 202,000,000  133,000,000 168,000,000 243,000,000      
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2012 and december 31, 2011
                                                                              
        regulatory liabilities—current
                                                               6,000,000      27,000,000         
        accounts payable and accrued liabilities
                                                                172,000,000 167,000,000 144,000,000 152,000,000 209,000,000 187,000,000 206,000,000 186,000,000 256,000,000 217,000,000 194,000,000 170,000,000 273,000,000  
        regulatory liabilities - current
                                                                12,000,000 19,000,000 25,000,000 18,000,000 18,000,000  57,000,000 66,000,000 72,000,000      
        other current liabilities
                                                                131,000,000 74,000,000 95,000,000 82,000,000 91,000,000 92,000,000 111,000,000 72,000,000 76,000,000 41,000,000 47,000,000 36,000,000 49,000,000 40,000,000 
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2011 and december 31, 2010
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2011 and december 31, 2010
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2011 and december 31, 2010
                                                                              
        current deferred income taxes
                                                                   59,000,000 48,000,000  92,000,000 120,000,000 28,000,000 151,000,000     
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2010 and december 31, 2009
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2010 and december 31, 2009
                                                                              
        as of december 31,
                                                                     2,009,000,000    2,008,000,000     
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of december 31, 2009 and 2008
                                                                              
        assets from price risk management activities - current
                                                                      22,000,000 26,000,000 51,000,000      
        noncurrent deferred income taxes
                                                                      408,000,000 414,000,000       
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of september 30, 2009 and december 31, 2008
                                                                              
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of june 30, 2009 and december 31, 2008
                                                                              
        inventories, at average cost
                                                                        72,000,000  69,000,000 72,000,000 60,000,000 64,000,000 
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of march 31, 2009 and december 31, 2008
                                                                              
        assets from price risk management activities
                                                                         39,000,000 70,000,000 514,000,000 202,000,000 64,000,000 
        regulatory assets
                                                                         825,000,000 427,000,000 249,000,000 252,000,000 304,000,000 
        liabilities from price risk management activities
                                                                         426,000,000 246,000,000 139,000,000 99,000,000 101,000,000 
        accrued taxes
                                                                         18,000,000 54,000,000 29,000,000 28,000,000 23,000,000 
        regulatory liabilities
                                                                         683,000,000 666,000,000 1,012,000,000 727,000,000 574,000,000 
        preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of december 31, 2008 and 2007
                                                                              
        accounts and notes receivable
                                                                          142,000,000 151,000,000 233,000,000 178,000,000 
        short-term borrowings
                                                                          38,000,000    
        accumulated asset retirement obligations
                                                                          80,000,000 84,000,000 88,000,000  
        customer and counterparty deposits
                                                                           131,000,000   
        other property and investments:
                                                                              
        miscellaneous
                                                                            17,000,000 19,000,000 
        total other property and investments
                                                                            126,000,000 134,000,000 
        electric utility plant, net:
                                                                              
        electric utility plant at cost
                                                                             5,024,000,000 
        less: accumulated depreciation and amortization
                                                                             -1,958,000,000 
        nuclear decommissioning trust, at market value
                                                                             46,000,000 
        capitalization and liabilities
                                                                              
        capitalization:
                                                                              
        total capitalization
                                                                             2,629,000,000 
        accounts payable and other accruals
                                                                             227,000,000 
        long-term debt due within one year
                                                                              
        trojan asset retirement obligation
                                                                             62,000,000 
        accumulated asset retirement obligation
                                                                             29,000,000 
        total capitalization and liabilities
                                                                             4,108,000,000 
      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 2010-06-30 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 
                                                                               
          cash flows from operating activities:
                                                                               
          net income
        45,000,000 41,000,000 103,000,000 62,000,000 100,000,000 38,000,000 94,000,000 72,000,000 109,000,000 68,000,000 47,000,000 39,000,000 74,000,000 51,000,000 58,000,000 64,000,000 60,000,000 66,000,000 50,000,000 32,000,000 96,000,000 52,000,000 -17,000,000 39,000,000 81,000,000 61,000,000 55,000,000 25,000,000 73,000,000 49,000,000 53,000,000 46,000,000 64,000,000 42,000,000 40,000,000 32,000,000 73,000,000 61,000,000 34,000,000 37,000,000 61,000,000 51,000,000 36,000,000 35,000,000 50,000,000 43,000,000 38,000,000 35,000,000 58,000,000 47,000,000 31,000,000 -22,000,000 48,000,000 28,000,000 37,000,000 26,000,000 49,000,000 29,000,000 27,000,000 22,000,000 69,000,000 24,000,000 27,000,000 8,000,000 31,000,000 26,000,000 24,000,000 20,000,000 39,000,000 28,000,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                               
          depreciation and amortization
        144,000,000 151,000,000 148,000,000 139,000,000 140,000,000 127,000,000 126,000,000 122,000,000 121,000,000 118,000,000 116,000,000 113,000,000 111,000,000 107,000,000 108,000,000 103,000,000 99,000,000 99,000,000 101,000,000 101,000,000 103,000,000 134,000,000 108,000,000 104,000,000 108,000,000 104,000,000 103,000,000 101,000,000 101,000,000 101,000,000 96,000,000 93,000,000 92,000,000 88,000,000 87,000,000 86,000,000 84,000,000 77,000,000 79,000,000 83,000,000 82,000,000 78,000,000 76,000,000 76,000,000 75,000,000 77,000,000 76,000,000 73,000,000 75,000,000 62,000,000 62,000,000 62,000,000 62,000,000 60,000,000 63,000,000 63,000,000 62,000,000 57,000,000 59,000,000 55,000,000 56,000,000 57,000,000 57,000,000 51,000,000 53,000,000 50,000,000 57,000,000 54,000,000 54,000,000 50,000,000 50,000,000 
          deferred income taxes
        14,000,000 -2,000,000 14,000,000 5,000,000 20,000,000 5,000,000 -9,000,000 -10,000,000 37,000,000 11,000,000 -9,000,000 2,000,000 4,000,000 -3,000,000 5,000,000 4,000,000 -12,000,000 11,000,000 7,000,000 -1,000,000 -9,000,000 -18,000,000 -3,000,000 7,000,000 3,000,000 -3,000,000 -3,000,000 9,000,000 -19,000,000 -4,000,000 6,000,000 35,000,000 15,000,000 3,000,000 17,000,000 19,000,000 -2,000,000 6,000,000 14,000,000 9,000,000 9,000,000 12,000,000 10,000,000 8,000,000 11,000,000 5,000,000 15,000,000 13,000,000 -1,000,000 -14,000,000 13,000,000 -23,000,000 27,000,000 19,000,000 24,000,000 16,000,000 7,000,000 8,000,000 25,000,000 6,000,000 12,000,000 59,000,000 15,000,000 -3,000,000 11,000,000 13,000,000 -10,000,000 9,000,000 10,000,000 
          allowance for equity funds used during construction
        -3,000,000 -3,000,000 -4,000,000 -6,000,000 -5,000,000 -6,000,000 -6,000,000 -6,000,000 -5,000,000 -7,000,000 -5,000,000 -4,000,000 -3,000,000 -4,000,000 -4,000,000 -3,000,000 -3,000,000 -4,000,000 -4,000,000 -5,000,000 -4,000,000 -5,000,000 -4,000,000 -4,000,000 -3,000,000 -3,000,000 -2,000,000 -2,000,000 -3,000,000 -3,000,000 -2,000,000 -2,000,000 -4,000,000 -3,000,000 -4,000,000 -3,000,000 -2,000,000 -2,000,000 -4,000,000 -8,000,000 -7,000,000 -6,000,000 -6,000,000 -5,000,000 -4,000,000 -11,000,000 -11,000,000 -9,000,000 -6,000,000 -5,000,000 -4,000,000 -2,000,000 -2,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -1,000,000 -1,000,000 -4,000,000 -4,000,000 -5,000,000 -5,000,000 -6,000,000 -2,000,000 -2,000,000 -3,000,000   
          alternative revenue programs
        -16,000,000 -10,000,000 -6,000,000 -9,000,000 4,000,000 13,000,000                                                                  
          regulatory assets
        12,000,000 30,000,000 -3,000,000 2,000,000 -5,000,000 4,000,000 -12,000,000 2,000,000 -120,000,000 10,000,000 20,000,000 -4,000,000 -6,000,000                                                           
          regulatory liabilities
        31,000,000 -5,000,000 -8,000,000 -8,000,000 -4,000,000 -6,000,000 -7,000,000 -3,000,000 7,000,000 5,000,000 4,000,000 8,000,000                                                           
          tax credit sales
        3,000,000 26,000,000 140,000,000 10,000,000 3,000,000 81,000,000 18,000,000                                                                 
          other non-cash income and expenses
        43,000,000 -5,000,000 20,000,000 19,000,000 30,000,000 -2,000,000 20,000,000 16,000,000 23,000,000 -6,000,000 18,000,000 18,000,000 10,000,000 -10,000,000 26,000,000 -1,000,000 39,000,000 -9,000,000 -20,000,000 6,000,000 13,000,000 -16,000,000 -8,000,000 27,000,000 19,000,000 -4,000,000 17,000,000 11,000,000 10,000,000 13,000,000 4,000,000 4,000,000 11,000,000 2,000,000 9,000,000 7,000,000 -3,000,000 -1,000,000 5,000,000 4,000,000 -2,000,000 8,000,000 5,000,000 6,000,000 -6,000,000 6,000,000 5,000,000 7,000,000 5,000,000 3,000,000 10,000,000 1,000,000 4,000,000 -3,000,000 14,000,000 9,000,000 14,000,000 3,000,000 12,000,000 17,000,000 9,000,000 -2,000,000 -4,000,000 5,000,000 9,000,000  7,000,000 1,000,000 11,000,000 
          changes in working capital:
                                                                               
          accounts receivable
        52,000,000  -61,000,000 77,000,000 -25,000,000  -80,000,000 21,000,000 -5,000,000  -59,000,000                                                             
          inventories
        -6,000,000  -1,000,000 -12,000,000 3,000,000  2,000,000 -3,000,000 -1,000,000  -1,000,000                                                             
          margin deposits
        45,000,000 -57,000,000 -19,000,000 30,000,000 55,000,000 -34,000,000 -36,000,000 10,000,000 27,000,000 -63,000,000 -3,000,000                                                             
          accounts payable and accrued liabilities
        -48,000,000 1,000,000 78,000,000 2,000,000 -37,000,000 -20,000,000 101,000,000 -58,000,000 24,000,000 15,000,000 52,000,000                                                             
          margin deposits from wholesale counterparties
        3,000,000    5,000,000     -2,000,000 2,000,000                                                             
          other working capital items
        -3,000,000 -47,000,000 15,000,000 50,000,000 -28,000,000 -40,000,000 22,000,000 22,000,000 -16,000,000 -40,000,000 11,000,000 36,000,000 -27,000,000 -46,000,000 18,000,000 33,000,000 -27,000,000 -43,000,000 -10,000,000 46,000,000 -14,000,000 -10,000,000 9,000,000 27,000,000 -9,000,000 -37,000,000 9,000,000 28,000,000 -12,000,000 -30,000,000 6,000,000 18,000,000 -5,000,000 -19,000,000 9,000,000 24,000,000 -13,000,000 -16,000,000 6,000,000 22,000,000 -16,000,000 -19,000,000 8,000,000 27,000,000 -20,000,000 -10,000,000 12,000,000 -1,000,000 -13,000,000 -7,000,000 13,000,000 23,000,000 -12,000,000 -22,000,000 31,000,000 16,000,000 -24,000,000 -20,000,000 18,000,000 11,000,000 -16,000,000 4,000,000 -13,000,000 -66,000,000 14,000,000 22,000,000 -21,000,000 -15,000,000 16,000,000 4,000,000 -13,000,000 
          other
        -48,000,000 23,000,000 -16,000,000 -18,000,000 -23,000,000 10,000,000 -6,000,000 -10,000,000 -28,000,000 11,000,000 -6,000,000 -7,000,000 -14,000,000 43,000,000 -36,000,000 -31,000,000 -21,000,000 27,000,000 -24,000,000 -21,000,000 -20,000,000 9,000,000 -25,000,000 -5,000,000 -16,000,000 -7,000,000 -15,000,000 -7,000,000 -9,000,000 11,000,000 -7,000,000 -10,000,000 -7,000,000 3,000,000 -6,000,000 -10,000,000 -5,000,000 9,000,000 -10,000,000 -6,000,000 -13,000,000 13,000,000 -6,000,000 -8,000,000 -6,000,000 -2,000,000 -5,000,000 -7,000,000 -2,000,000 -12,000,000   -2,000,000 -3,000,000 -4,000,000 3,000,000 -2,000,000 1,000,000   -3,000,000 -8,000,000 -8,000,000 6,000,000 -6,000,000 5,000,000 8,000,000 -18,000,000   
          net cash from operating activities
        268,000,000 148,000,000 403,000,000 336,000,000 231,000,000 170,000,000 244,000,000 189,000,000 175,000,000 89,000,000 188,000,000 182,000,000 -39,000,000 100,000,000 123,000,000 202,000,000 249,000,000 -50,000,000 306,000,000 108,000,000 168,000,000 125,000,000 86,000,000 201,000,000 155,000,000 44,000,000 188,000,000 158,000,000 156,000,000 94,000,000 198,000,000 144,000,000 194,000,000 78,000,000 186,000,000 163,000,000 170,000,000 56,000,000 159,000,000 177,000,000 161,000,000 78,000,000 191,000,000 114,000,000 134,000,000 45,000,000 171,000,000 144,000,000 158,000,000 85,000,000 180,000,000 114,000,000 165,000,000 44,000,000 183,000,000 157,000,000 110,000,000 54,000,000 120,000,000 133,000,000 146,000,000 178,000,000 68,000,000 9,000,000 157,000,000 180,000,000 40,000,000 -39,000,000 -146,000,000 251,000,000 117,000,000 
          cash flows from investing activities:
                                                                               
          capital expenditures
        -259,000,000 -290,000,000 -303,000,000 -237,000,000 -359,000,000 -392,000,000 -253,000,000 -298,000,000 -325,000,000 -427,000,000 -358,000,000 -299,000,000 -274,000,000 -225,000,000 -196,000,000 -178,000,000 -167,000,000 -150,000,000 -160,000,000 -173,000,000 -153,000,000 -235,000,000 -179,000,000 -208,000,000 -162,000,000 -199,000,000 -136,000,000 -121,000,000 -150,000,000 -194,000,000 -135,000,000 -135,000,000 -131,000,000 -145,000,000 -124,000,000 -131,000,000 -114,000,000 -130,000,000 -135,000,000 -188,000,000 -131,000,000 -146,000,000 -139,000,000 -135,000,000 -178,000,000 -183,000,000 -323,000,000 -316,000,000 -185,000,000 -203,000,000 -193,000,000 -152,000,000 -108,000,000 -85,000,000 -81,000,000 -68,000,000 -69,000,000 -85,000,000 -77,000,000 -69,000,000 -69,000,000 -172,000,000 -92,000,000 -152,000,000 -149,000,000 -304,000,000 -91,000,000 -102,000,000 -75,000,000 -135,000,000 -71,000,000 
          free cash flows
        9,000,000 -142,000,000 100,000,000 99,000,000 -128,000,000 -222,000,000 -9,000,000 -109,000,000 -150,000,000 -338,000,000 -170,000,000 -117,000,000 -313,000,000 -125,000,000 -73,000,000 24,000,000 82,000,000 -200,000,000 146,000,000 -65,000,000 15,000,000 -110,000,000 -93,000,000 -7,000,000 -7,000,000 -155,000,000 52,000,000 37,000,000 6,000,000 -100,000,000 63,000,000 9,000,000 63,000,000 -67,000,000 62,000,000 32,000,000 56,000,000 -74,000,000 24,000,000 -11,000,000 30,000,000 -68,000,000 52,000,000 -21,000,000 -44,000,000 -138,000,000 -152,000,000 -172,000,000 -27,000,000 -118,000,000 -13,000,000 -38,000,000 57,000,000 -41,000,000 102,000,000 89,000,000 41,000,000 -31,000,000 43,000,000 64,000,000 77,000,000 6,000,000 -24,000,000 -143,000,000 8,000,000 -124,000,000 -51,000,000 -141,000,000 -221,000,000 116,000,000 46,000,000 
          sales of nuclear decommissioning trust securities
        3,000,000 3,000,000          1,000,000 2,000,000 4,000,000 1,000,000 4,000,000 3,000,000 3,000,000 2,000,000 1,000,000 3,000,000 2,000,000 4,000,000 3,000,000 4,000,000 4,000,000 5,000,000 3,000,000 3,000,000 7,000,000 3,000,000 4,000,000 7,000,000 10,000,000 6,000,000 5,000,000 6,000,000 11,000,000 4,000,000 3,000,000 4,000,000 4,000,000 4,000,000 3,000,000 6,000,000 5,000,000 6,000,000 6,000,000 8,000,000 5,000,000 5,000,000 6,000,000 7,000,000 7,000,000 10,000,000 11,000,000 18,000,000 5,000,000 13,000,000 6,000,000 13,000,000 10,000,000 7,000,000   7,000,000 
          purchases of nuclear decommissioning trust securities
        -3,000,000 -6,000,000 -1,000,000 -2,000,000 -4,000,000      -1,000,000 -2,000,000 -4,000,000 -1,000,000 -2,000,000 -3,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -3,000,000 -3,000,000 -2,000,000 -3,000,000 -4,000,000 -2,000,000 -3,000,000 -6,000,000 -3,000,000 -4,000,000 -5,000,000 -9,000,000 -5,000,000 -5,000,000 -6,000,000 -9,000,000 -3,000,000 -2,000,000 -5,000,000 -4,000,000 -5,000,000 -4,000,000 -6,000,000 -5,000,000 -6,000,000 -6,000,000 -9,000,000 -7,000,000 -6,000,000 -6,000,000 -7,000,000 -9,000,000 -10,000,000 -12,000,000 -19,000,000 -5,000,000 -12,000,000 -5,000,000 -14,000,000 -10,000,000 -7,000,000 1,000,000 -8,000,000   
          net cash from investing activities
        -262,000,000 -280,000,000 -307,000,000 -233,000,000 -376,000,000 -397,000,000 -261,000,000 -308,000,000 -331,000,000 -426,000,000 -358,000,000 -298,000,000 -276,000,000 -230,000,000 -194,000,000 -180,000,000 -154,000,000 -154,000,000 -165,000,000 -175,000,000 -162,000,000 -236,000,000 -181,000,000 -213,000,000 -157,000,000 -198,000,000 -135,000,000 -120,000,000 -151,000,000 -193,000,000 -13,000,000 -135,000,000 -130,000,000 -145,000,000 -124,000,000 -132,000,000 -113,000,000 -131,000,000 -135,000,000 -186,000,000 -133,000,000 -145,000,000 -139,000,000 -71,000,000 -167,000,000 -173,000,000 -327,000,000 -315,000,000 -179,000,000 -201,000,000 -232,000,000 -152,000,000 -107,000,000 -85,000,000 -81,000,000 -70,000,000 -58,000,000 -85,000,000 -75,000,000 -69,000,000 -70,000,000 -172,000,000 -73,000,000 -154,000,000 -150,000,000 -305,000,000 -91,000,000 -105,000,000 -73,000,000 -136,000,000 -68,000,000 
          cash flows from financing activities:
                                                                               
          proceeds from issuance of long-term debt
         310,000,000 220,000,000 450,000,000 200,000,000 300,000,000 100,000,000        230,000,000 200,000,000 119,000,000 270,000,000       150,000,000    25,000,000 125,000,000 140,000,000 70,000,000 75,000,000 180,000,000 180,000,000   155,000,000 75,000,000           58,000,000 191,000,000 150,000,000     
          payments on long-term debt
         -68,000,000 -102,000,000     -260,000,000     -20,000,000 -140,000,000 -98,000,000 -50,000,000       -100,000,000    -133,000,000 -55,000,000 -267,000,000 -120,000,000     -50,000,000       -63,000,000 -10,000,000 -37,000,000 -149,000,000     
          issuance of commercial paper
        9,000,000           72,000,000 68,000,000            20,000,000                                               
          dividends paid
        -60,000,000 -58,000,000 -58,000,000 -54,000,000 -55,000,000 -52,000,000 -52,000,000 -48,000,000 -48,000,000 -48,000,000 -47,000,000 -44,000,000 -40,000,000 -41,000,000 -40,000,000 -39,000,000 -38,000,000 -38,000,000 -39,000,000 -37,000,000 -36,000,000 -37,000,000 -34,000,000 -35,000,000 -34,000,000 -35,000,000 -34,000,000 -33,000,000 -32,000,000 -32,000,000 -32,000,000 -31,000,000 -30,000,000 -31,000,000 -30,000,000 -29,000,000 -28,000,000 -28,000,000 -29,000,000 -26,000,000 -27,000,000 -27,000,000 -26,000,000 -22,000,000 -22,000,000 -21,000,000 -23,000,000 -21,000,000 -22,000,000 -22,000,000 -21,000,000 -21,000,000 -20,000,000 -20,000,000 -20,000,000 -21,000,000 -20,000,000 -20,000,000 -20,000,000 -19,000,000 -20,000,000 -19,000,000 -19,000,000 -19,000,000 -19,000,000 -19,000,000 -15,000,000 -15,000,000 -16,000,000 -14,000,000 -15,000,000 
          net cash (used) provided by financing activities
        -74,000,000                                                                       
          change in cash and cash equivalents
        -68,000,000 -61,000,000 81,000,000 45,000,000 -1,000,000 -23,000,000 29,000,000 -170,000,000 171,000,000 -42,000,000                                               -91,000,000      -15,000,000 -12,000,000 11,000,000 37,000,000     
          cash and cash equivalents, beginning of period
        76,000,000  12,000,000  5,000,000  165,000,000  52,000,000  257,000,000  30,000,000  119,000,000  39,000,000  6,000,000  4,000,000  127,000,000  107,000,000  12,000,000  6,000,000  4,000,000 31,000,000  10,000,000  73,000,000 
          cash and cash equivalents, end of period
        8,000,000  81,000,000 45,000,000 11,000,000  29,000,000 -170,000,000 176,000,000  34,000,000 1,000,000 12,000,000  -73,000,000 -19,000,000 110,000,000  277,000,000 -118,000,000 135,000,000  -50,000,000 273,000,000 30,000,000  -78,000,000 89,000,000  152,000,000 -22,000,000 70,000,000  56,000,000 2,000,000 31,000,000  -5,000,000 89,000,000 4,000,000  -30,000,000 95,000,000 27,000,000  33,000,000 64,000,000  -28,000,000 86,000,000 33,000,000  82,000,000 66,000,000 8,000,000  25,000,000 45,000,000 27,000,000 11,000,000 52,000,000  -12,000,000 11,000,000 47,000,000  -197,000,000 151,000,000 51,000,000 
          supplemental cash flow information is as follows:
                                                                               
          cash paid for interest, net of amounts capitalized
        51,000,000  52,000,000 51,000,000 43,000,000  40,000,000 55,000,000 26,000,000  21,000,000 48,000,000 22,000,000  18,000,000 45,000,000 18,000,000    16,000,000  14,000,000 44,000,000 12,000,000  13,000,000 47,000,000 13,000,000  14,000,000 45,000,000 13,000,000  13,000,000 42,000,000 13,000,000  12,000,000 39,000,000 10,000,000  11,000,000 42,000,000 14,000,000  7,000,000 35,000,000 10,000,000 33,000,000 12,000,000 32,000,000 13,000,000 36,000,000 13,000,000 35,000,000 13,000,000 37,000,000 15,000,000 36,000,000 15,000,000           
          cash paid for income taxes
        1,000,000    -1,000,000  -4,000,000 -12,000,000 2,000,000  9,000,000 14,000,000 2,000,000  2,000,000 14,000,000 2,000,000      4,000,000    1,000,000    10,000,000    3,000,000    5,000,000    2,000,000    5,000,000   1,000,000 3,000,000   7,000,000    2,000,000 1,000,000           
          pension and other postretirement benefits
            2,000,000 2,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 6,000,000 4,000,000 3,000,000 5,000,000 7,000,000 6,000,000 6,000,000 5,000,000 5,000,000 6,000,000 6,000,000 5,000,000 4,000,000 6,000,000 6,000,000 11,000,000 6,000,000 7,000,000 6,000,000 5,000,000 6,000,000 7,000,000 6,000,000 7,000,000 7,000,000 7,000,000 7,000,000 9,000,000 6,000,000 10,000,000 9,000,000 8,000,000 8,000,000 9,000,000 8,000,000 9,000,000 8,000,000 10,000,000 10,000,000 5,000,000 8,000,000                 
          stock-based compensation
                                                                               
          accounts receivable and unbilled revenues
                                                                               
          contribution to pension and other postretirement plans
                                                                               
          contribution to non-qualified employee benefit trust
                                                                               
          asset retirement obligation settlements
                                                                               
          proceeds from issuances of common stock, net of issuance costs
                                                                               
          issuance (maturities) of commercial paper
             -146,000,000                                                               
          net cash from financing activities
         71,000,000 -15,000,000 -58,000,000 144,000,000 204,000,000 46,000,000 -51,000,000 327,000,000 295,000,000 204,000,000 117,000,000 162,000,000 277,000,000 -2,000,000 -41,000,000 -37,000,000 -38,000,000 136,000,000 -51,000,000 -128,000,000 115,000,000 45,000,000 285,000,000 2,000,000 173,000,000 -53,000,000 -116,000,000 -35,000,000 18,000,000 -33,000,000 -31,000,000 -33,000,000 17,000,000 -6,000,000 -29,000,000 -32,000,000 -7,000,000 -29,000,000 98,000,000 -28,000,000 -21,000,000 -82,000,000 52,000,000 -67,000,000 158,000,000 156,000,000 204,000,000 -22,000,000 132,000,000 24,000,000 124,000,000 -37,000,000 -103,000,000 -20,000,000 -21,000,000 -50,000,000 -60,000,000 -20,000,000 -19,000,000 -53,000,000 5,000,000 26,000,000 130,000,000 -19,000,000 136,000,000 88,000,000 149,000,000 22,000,000 36,000,000 -71,000,000 
          cash and cash equivalents, beginning of year
                                                                               
          cash and cash equivalents, end of year
                                                                               
          supplemental disclosures of cash flow information:
                                                                               
          cash paid for:
                                                                               
          interest, net of amounts capitalized
                                                                       28,000,000 11,000,000 22,000,000 13,000,000 24,000,000 10,000,000   
          income taxes
                                                                           12,000,000 5,000,000   
          non-cash investing and financing activities:
                                                                               
          accrued capital additions
                                               4,000,000 49,000,000 7,000,000 -33,000,000 -4,000,000 62,000,000 -6,000,000 -29,000,000 36,000,000 69,000,000 61,000,000 -11,000,000 23,000,000 11,000,000 4,000,000 1,000,000 6,000,000 8,000,000 -3,000,000 -2,000,000 15,000,000 9,000,000 -45,000,000 68,000,000 -56,000,000 21,000,000 -52,000,000 104,000,000 -3,000,000 7,000,000 -59,000,000 71,000,000 
          accrued dividends payable
                                               1,000,000 28,000,000 1,000,000 5,000,000 22,000,000 1,000,000 22,000,000 1,000,000 1,000,000 20,000,000 21,000,000 1,000,000 20,000,000 20,000,000 1,000,000 -1,000,000 2,000,000 18,000,000 1,000,000 15,000,000 
          see accompanying notes to condensed consolidated financial statements.
                                                                               
          proceeds from issuance of common stock
              100,000,000 78,000,000  93,000,000 92,000,000 300,000,000                                                           
          maturities of commercial paper
                                                          -17,000,000  -30,000,000               
          cash received for income taxes
          -134,000,000                                                                     
          see accompanying notes to consolidated financial statements.
                                                                               
          proceeds from pelton/round butte financing arrangement
                                                                             
          repurchase of common stock
                     -18,000,000                                                     
          proceeds from sale of properties
                  2,000,000 1,000,000 12,000,000                                                       
          decoupling mechanism deferrals, net of amortization
               3,000,000 11,000,000 -5,000,000 -1,000,000 -2,000,000 -3,000,000 -6,000,000 -1,000,000 -3,000,000 -1,000,000 6,000,000 12,000,000 8,000,000 3,000,000   1,000,000 -9,000,000 4,000,000 -5,000,000 3,000,000 -4,000,000 -4,000,000 -1,000,000 3,000,000 -7,000,000 -6,000,000 -9,000,000     4,000,000   -3,000,000 2,000,000 7,000,000 1,000,000 -4,000,000 -1,000,000 -5,000,000                   
          borrowings on short-term debt
                         200,000,000 75,000,000 180,000,000 20,000,000                                             
          payments on short-term debt
                                                                       -72,000,000     
          other post retirement benefits settlement gain
                                                                              
          2020 labor day wildfire earnings test reserve
                                                                             
          assets obtained under leasing arrangements
                      29,000,000             6,000,000 6,000,000                                         
          increase in cash and cash equivalents
                   1,000,000 -153,000,000 147,000,000 -73,000,000 -19,000,000 58,000,000 -242,000,000 277,000,000 -118,000,000 -122,000,000 4,000,000 -50,000,000   19,000,000 -78,000,000 -30,000,000 -81,000,000 152,000,000 -22,000,000 31,000,000 -50,000,000 56,000,000 2,000,000 25,000,000 -82,000,000 -5,000,000          -43,000,000 16,000,000 -28,000,000 86,000,000 21,000,000  82,000,000 66,000,000 2,000,000   45,000,000 23,000,000 11,000,000 21,000,000      -197,000,000   
          decrease in accounts receivable
                    34,000,000   16,000,000 21,000,000  1,000,000 -7,000,000 -2,000,000  -43,000,000 21,000,000 19,000,000                                               
          decrease in inventories
                       -25,000,000 6,000,000    4,000,000    -1,000,000    3,000,000    -2,000,000    5,000,000    1,000,000    -13,000,000                           
          decrease in margin deposits
                    86,000,000 -72,000,000 -11,000,000 -20,000,000 23,000,000 -32,000,000   -1,000,000 14,000,000 3,000,000 10,000,000 -19,000,000  -7,000,000 10,000,000 1,000,000 -11,000,000 2,000,000   -7,000,000 -3,000,000   7,000,000   -13,000,000 8,000,000   -6,000,000 -3,000,000 15,000,000 -8,000,000 27,000,000 -2,000,000 -1,000,000 13,000,000 7,000,000 16,000,000 29,000,000 -18,000,000   13,000,000 3,000,000   30,000,000 41,000,000 78,000,000 -16,000,000     
          (decrease) in accounts payable and accrued liabilities
                    -174,000,000           -5,000,000 -22,000,000   -52,000,000 -13,000,000   -3,000,000 -17,000,000    -10,000,000                                   
          increase in margin deposits from wholesale counterparties
                    -140,000,000 38,000,000 -105,000,000 50,000,000 99,000,000 -44,000,000                                                      
          amortization of net benefits due to tax reform
                                                                               
          deferral of incremental storm costs
                     -1,000,000 -1,000,000 -1,000,000 -2,000,000 -9,000,000 -6,000,000 -11,000,000 -41,000,000                                                   
          2020 labor day wildfire deferral
                                                                               
          deferral of wildfire mitigation costs
                                                                               
          increase in receivables and unbilled revenues
                                                                               
          increase in payables and accrued liabilities
                                                         1,000,000    43,000,000    2,000,000              
          increase in accounts receivable
                                                                               
          increase in inventories
                                                  7,000,000                             
          increase in accounts payable and accrued liabilities
                      135,000,000 -11,000,000 -44,000,000  48,000,000 -13,000,000 26,000,000                                                   
          repayments of short-term debt
                          -200,000,000 -150,000,000  -30,000,000 -20,000,000                                               
          deferral of incremental wildfire costs
                        -7,000,000                                                       
          proceeds from failed sale-leaseback transactions
                        25,000,000                                                       
          (amortization) deferral of net benefits due to tax reform
                                 -7,000,000 -5,000,000 -6,000,000 -5,000,000                                           
          decrease in receivables and unbilled revenues
                                                                               
          debt extinguishment costs
                                                                               
          (increase) in inventories
                                                                               
          (increase) in margin deposits
                                        -6,000,000    -12,000,000                                   
          proceeds from carty settlement
                                                                              
          (amortization) of net benefits due to tax reform
                               -5,000,000 -6,000,000                                               
          (decrease) in cash and cash equivalents
                                                                               
          decrease in accounts receivable and unbilled revenues
                                  -13,000,000 64,000,000 -1,000,000  -14,000,000 -19,000,000 45,000,000  -15,000,000 26,000,000 29,000,000  -6,000,000 13,000,000 46,000,000  5,000,000 -5,000,000 37,000,000  -23,000,000 41,000,000 14,000,000                       
          deferral of net benefits due to tax reform
                                     8,000,000 12,000,000 10,000,000 15,000,000                                       
          (increase) in receivables and unbilled revenues
                                                                               
          (maturities) issuances of commercial paper
                                                                               
          unrealized losses on non-qualified benefit plan trust assets
                                                                               
          distribution from nuclear decommissioning trust
                                                                     19,000,000         
          sales tax refund received - tucannon river wind farm
                                                                               
          change in short-term debt
                                              -6,000,000                               
          assets obtained under capital lease
                                          18,000,000    3,000,000 54,000,000                               
          decrease in accounts payable and accrued liabilities
                                               -2,000,000 -11,000,000   -21,000,000 -1,000,000   -23,000,000 -6,000,000                       
          regulatory deferral of settled derivative instruments
                                                   2,000,000 1,000,000 3,000,000 1,000,000 5,000,000 -6,000,000 3,000,000 5,000,000 5,000,000 -10,000,000 -3,000,000   -3,000,000 3,000,000             
          cash received to be returned to customers pursuant to the residential exchange program, net of amortization
                                                                               
          contribution to voluntary employees’ benefit association trust
                                                                               
          distribution from (contribution to) nuclear decommissioning trust
                                                                              
          cash received in connection with purchase of 10% interest in boardman, net of cash paid
                                                                               
          accrued sales tax refund related to tucannon river wind farm
                                                                               
          increase in net liabilities from price risk management activities
                                              -13,000,000 -48,000,000 2,000,000 -11,000,000 8,000,000 10,000,000 53,000,000        -37,000,000    21,000,000 35,000,000 38,000,000 -35,000,000 -29,000,000 -11,000,000 106,000,000         
          regulatory deferrals—price risk management activities
                                              13,000,000 48,000,000 -2,000,000 11,000,000 -8,000,000 -10,000,000 -53,000,000 -105,000,000 -24,000,000 65,000,000 19,000,000                       
          sales tax refund received related to tucannon river wind farm
                                                  11,000,000 12,000,000                           
          proceeds from issuance of common stock, net of issuance costs
                                                         20,000,000             170,000,000     
          payments on capital leases
                                               -1,000,000 -1,000,000                               
          debt issuance costs
                                               -1,000,000    -1,000,000    -1,000,000           -1,000,000 -1,000,000 -1,000,000       
          increase in margin deposits
                                                -7,000,000    -9,000,000                  -33,000,000         
          decrease in cash and cash equivalents
                                                  -30,000,000 95,000,000 -100,000,000                          -22,000,000 
          cascade crossing transmission project
                                                                             
          power cost deferrals, net of amortization
                                                         -2,000,000 -1,000,000 -1,000,000 -2,000,000 -8,000,000 1,000,000 3,000,000               
          changes in working capital, net of effects from purchase of 10% interest in boardman in 2014:
                                                                               
          proceeds received from trojan spent fuel legal settlement
                                                                             
          proceeds received from insurance recoveries
                                                                               
          preliminary engineering transferred to construction work in progress from other noncurrent assets
                                                           5,000,000 4,000,000                 
          cash received pursuant to the residential exchange program
                                                                               
          proceeds received from insurance recovery
                                                         3,000,000                      
          proceeds from sale of property
                                                      4,000,000                       
          cash received to be returned to customers pursuant to the residential exchange program
                                                    1,000,000 -1,000,000 -1,000,000 15,000,000                       
          changes in working capital, net of effects from purchase of 10% interest in boardman:
                                                                               
          income tax refund received
                                                             8,000,000 1,000,000 8,000,000           
          contribution to nuclear decommissioning trust
                                                                             
          decrease in net liabilities from price risk management activities
                                                      24,000,000 -65,000,000 -19,000,000  -19,000,000    -78,000,000                 
          preliminary engineering costs transferred to construction work-in-progress from other noncurrent assets
                                                                               
          renewable adjustment clause deferrals
                                                                6,000,000 5,000,000             
          contribution to pension plan
                                                                             
          proceeds from sale of solar power facility
                                                                             
          premium paid on repayment of long-term debt
                                                                               
          noncontrolling interests’ capital distributions
                                                                  -4,000,000           
          regulatory deferral—price risk management activities
                                                          19,000,000 -21,000,000 37,000,000  77,000,000                 
          decrease in receivables
                                                          8,000,000 10,000,000 29,000,000  -1,000,000 33,000,000 9,000,000  -6,000,000 29,000,000 -1,000,000 26,000,000 33,000,000 -50,000,000 10,000,000 32,000,000 19,000,000 -60,000,000 13,000,000   
          preliminary engineering costs transferred to construction work in progress from other noncurrent assets
                                                                               
          decrease in payables and accrued liabilities
                                                           -9,000,000 -4,000,000   -39,000,000 -18,000,000               
          increase in income taxes receivable
                                                                               
          noncontrolling interests’ capital (distributions) contributions
                                                                               
          contribution to voluntary employees’ beneficiary association trust
                                                                               
          increase to boardman’s asset retirement obligation and cost basis of plant for updated depreciation study
                                                                               
          regulatory deferral - price risk management activities
                                                                -22,000,000  -38,000,000 35,000,000 29,000,000 11,000,000 -106,000,000  100,000,000 81,000,000 -87,000,000    141,000,000 
          sale of solar power facility
                                                                10,000,000               
          senate bill 408 amortization
                                                                               
          unrealized gains on non-qualified benefit plan trust assets
                                                                               
          distribution of trojan refund liability
                                                                               
          issuances (maturities) of commercial paper
                                                                               
          borrowings on revolving lines of credit
                                                                               
          payments on revolving lines of credit
                                                                               
          power cost deferrals
                                                                  5,000,000 8,000,000 4,000,000   -5,000,000 -4,000,000 -4,000,000 -5,000,000 -6,000,000   
          senate bill 408 deferrals
                                                                  -1,000,000 -1,000,000 -3,000,000 -6,000,000 -1,000,000    -6,000,000  1,000,000 -2,000,000 3,000,000 
          decoupling mechanism deferrals
                                                                               
          contribution to the voluntary employees’ beneficiary association trust
                                                                               
          (payments) borrowings on commercial paper
                                                                               
          decrease in payables
                                                                   -6,000,000 -10,000,000 -26,000,000 -11,000,000  5,000,000       
          payments on commercial paper
                                                                   -19,000,000           
          borrowings on revolving credit facilities
                                                                        82,000,000     
          payments on revolving credit facilities
                                                                        -213,000,000     
          borrowings (payments) on short-term debt
                                                                     4,000,000 4,000,000         
          noncontrolling interests’ capital contributions
                                                                               
          cash paid during the period for interest, net of amounts capitalized
                                                                      16,000,000        12,000,000 
          trojan refund liability
                                                                           1,000,000    
          losses on non-qualified benefit plan trust assets
                                                                               
          senate bill 408 deferrals, net of amortization
                                                                               
          increase in payables
                                                                          -35,000,000 -1,000,000   13,000,000 
          insurance proceeds
                                                                              3,000,000 
          years ended december 31,
                                                                               
          (payments) borrowings on short-term debt
                                                                               
          noncontrolling interests’ capital contribution
                                                                               
          cash paid during the year for:
                                                                               
          former parent’s capital contribution of oregon tax credits
                                                                           -5,000,000    
          reconciliation of net income to net cash from operating activities:
                                                                               
          increase in net liabilities (assets) from price risk management activities
                                                                        -100,000,000 -81,000,000 87,000,000     
          insurance proceeds received
                                                                              
          noncontrolling interests’ cash contributions
                                                                        7,000,000     
          cash paid during the period for:
                                                                               
          proceeds from issuance of long-term debt, net of issuance costs
                                                                          129,000,000     
          cash paid during the period for
                                                                               
          regulatory deferrals - price risk management activities
                                                                               
          net margin deposit activity
                                                                           -43,000,000 -267,000,000 125,000,000 22,000,000 
          net assets from price risk management activities
                                                                            551,000,000 -271,000,000 -141,000,000 
          non-qualified benefit plan trust loss
                                                                               
          short-term borrowings (payments)
                                                                               
          regulatory deferral-price risk management activities
                                                                               
          sales of nuclear decommissiong trust securities
                                                                               
          increase in receivables
                                                                               
          payments on long-term debt, net of issuance costs
                                                                              -56,000,000 
          proceeds from sale of assets
                                                                               
          issuance of long-term debt
                                                                               
          short-term borrowings
                                                                               
          repayment of long-term debt
                                                                               
          cash paid during the year:
                                                                               
          common stock dividends declared but not paid