7Baggers

Ameren Corporation
(NYSE:AEE) 

AEE stock logo

Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. It operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. The company engages in the rate-regu...

Founded: 1997
Full Time Employees: 9,323
Sector: Utilities
Industry: Utilities-Regulated Electric

Share this website to your friends
• Market Cap:
• Exchange:
• Shs Outstanding:
• Employees:
• Beta:
• Return on Equity (ROE) ttm:
• Return on Assets (ROA) ttm:
• EPS ttm:
• Book value per Share:
• Cash per Share:
• Current ast per Share:
• P/E ttm:
• P/E forward:
• P/E ttm high:
• P/E ttm low:
• P/S ttm:
• P/B ttm:
• P/FCF ttm:
• PEG ratio:
• Cash Ratio ttm:
• Quick Ratio ttm:
• Current Ratio ttm:
• Gross Mgn ttm:
• EBITDA Mgn ttm:
• Operating Mgn ttm:
• Net Income Mgn ttm:
• Trailing Div yield:
• Forward Div yield:
• Payout Ratio ttm:
• Ex-Dividend date:
• Target Price High:
• Target Price Low:
• Target Price Mean:
• Number of Analysts:
• Debt Ratio ttm:
• Debt to Equity ttm:
• Total Net Debt:
At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2025-12-31 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 2021-09-30 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 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2006-05-02 
                                                                    
      operating revenues:
                                                                    
      electric
    1,445,000,000 2,563,000,000 2,038,000,000 1,622,000,000 1,620,000,000 2,035,000,000 1,521,000,000 1,364,000,000 1,343,000,000 1,921,000,000 1,585,000,000 1,590,000,000 1,610,000,000 2,140,000,000 1,513,000,000 1,318,000,000 1,668,000,000 1,284,000,000 1,156,000,000 1,065,000,000 1,489,000,000 1,237,000,000 1,120,000,000 1,053,000,000 1,528,000,000 1,218,000,000 1,182,000,000 1,130,000,000 1,590,000,000 1,396,000,000 1,223,000,000 1,127,000,000 1,594,000,000 1,383,000,000 1,206,000,000 1,095,000,000 1,725,000,000 1,274,000,000 1,102,000,000 1,087,000,000 1,700,000,000 1,250,000,000 1,143,000,000 1,049,000,000 1,523,000,000 1,235,000,000 1,106,000,000 1,009,000,000 1,507,000,000 1,228,000,000 1,614,000,000 1,470,000,000 1,426,000,000 2,122,000,000 1,533,000,000 1,440,000,000 1,320,000,000 1,679,000,000 1,515,000,000 1,395,000,000 1,423,000,000 1,928,000,000 1,545,000,000  
      natural gas
    337,000,000 136,000,000 183,000,000 475,000,000 321,000,000 138,000,000 172,000,000 452,000,000 275,000,000 139,000,000 175,000,000 472,000,000 436,000,000 166,000,000 213,000,000 561,000,000 143,000,000 188,000,000 410,000,000 263,000,000 139,000,000 161,000,000 320,000,000 263,000,000 131,000,000 161,000,000 374,000,000 289,000,000 134,000,000 167,000,000 362,000,000 275,000,000 129,000,000 155,000,000                               
      total operating revenues
    1,782,000,000 2,699,000,000 2,221,000,000 2,097,000,000 1,941,000,000 2,173,000,000 1,693,000,000 1,816,000,000 1,618,000,000 2,060,000,000 1,760,000,000 2,062,000,000 2,046,000,000 2,306,000,000 1,726,000,000 1,879,000,000 1,811,000,000 1,472,000,000 1,566,000,000 1,328,000,000 1,628,000,000 1,398,000,000 1,440,000,000 1,316,000,000 1,659,000,000 1,379,000,000 1,556,000,000 1,419,000,000 1,724,000,000 1,563,000,000 1,585,000,000 1,402,000,000 1,723,000,000 1,538,000,000 1,514,000,000 1,356,000,000 1,859,000,000 1,427,000,000 1,434,000,000 1,308,000,000 1,833,000,000 1,401,000,000 1,556,000,000 1,370,000,000 1,670,000,000 1,419,000,000 1,594,000,000 1,322,000,000 1,638,000,000 1,403,000,000 1,781,000,000 1,904,000,000 1,764,000,000 2,254,000,000 1,704,000,000 1,916,000,000 1,675,000,000 1,815,000,000 1,684,000,000 1,916,000,000 1,908,000,000 2,060,000,000 1,788,000,000  
      yoy
    -8.19% 24.21% 31.19% 15.47% 19.96% 5.49% -3.81% -11.93% -20.92% -10.67% 1.97% 9.74% 12.98% 56.66% 10.22% 41.49% 11.24% 5.29% 8.75% 0.91% -1.87% 1.38% -7.46% -7.26% -3.77% -11.77% -1.83% 1.21% 0.06% 1.63% 4.69% 3.39% -7.32% 7.78% 5.58% 3.67% 1.42% 1.86% -7.84% -4.53% 9.76% -1.27% -2.38% 3.63% 1.95% 1.14% -10.50% -30.57% -7.14% -37.76% 4.52% -0.63% 5.31% 24.19% 1.19% 0.00% -12.21% -11.89% -5.82%      
      qoq
    -33.98% 21.52% 5.91% 8.04% -10.68% 28.35% -6.77% 12.24% -21.46% 17.05% -14.65% 0.78% -11.27% 33.60% -8.14% 3.75% 23.03% -6.00% 17.92% -18.43% 16.45% -2.92% 9.42% -20.68% 20.30% -11.38% 9.65% -17.69% 10.30% -1.39% 13.05% -18.63% 12.03% 1.59% 11.65% -27.06% 30.27% -0.49% 9.63% -28.64% 30.84% -9.96% 13.58% -17.96% 17.69% -10.98% 20.57% -19.29% 16.75% -21.22% -6.46% 7.94% -21.74% 32.28% -11.06% 14.39% -7.71% 7.78% -12.11% 0.42% -7.38% 15.21%   
      operating expenses:
                                                                    
      fuel and purchased power
    242,000,000 768,000,000 794,000,000 502,000,000 527,000,000 499,000,000 327,000,000 328,000,000                                                         
      natural gas purchased for resale
    115,000,000 25,000,000 39,000,000 169,000,000 106,000,000 30,000,000 33,000,000 151,000,000 75,000,000 30,000,000 42,000,000 208,000,000 226,000,000 58,000,000 80,000,000 293,000,000 45,000,000 65,000,000 165,000,000 89,000,000 34,000,000 42,000,000 107,000,000 95,000,000 31,000,000 44,000,000 161,000,000 122,000,000 30,000,000 51,000,000 171,000,000 115,000,000 25,000,000 41,000,000                               
      other operations and maintenance
    527,000,000 502,000,000 460,000,000 485,000,000 514,000,000 520,000,000 465,000,000 470,000,000 498,000,000 470,000,000 450,000,000 448,000,000 510,000,000 475,000,000 491,000,000 461,000,000 457,000,000 412,000,000 420,000,000 421,000,000 418,000,000 384,000,000 438,000,000 444,000,000 434,000,000 450,000,000 417,000,000 473,000,000 429,000,000 439,000,000 431,000,000 431,000,000 402,000,000 422,000,000 405,000,000 430,000,000 411,000,000 435,000,000 400,000,000 438,000,000 428,000,000 427,000,000 401,000,000 455,000,000 404,000,000 412,000,000 420,000,000 388,000,000 383,000,000 447,000,000 475,000,000 463,000,000 515,000,000 444,000,000 446,000,000 416,000,000 444,000,000 422,000,000 451,000,000 421,000,000 517,000,000 449,000,000 469,000,000  
      depreciation and amortization
    400,000,000 415,000,000 386,000,000 367,000,000 465,000,000 388,000,000 376,000,000 361,000,000 363,000,000 369,000,000 335,000,000 320,000,000 324,000,000 350,000,000 316,000,000 299,000,000 290,000,000 285,000,000 281,000,000 276,000,000 273,000,000 271,000,000 255,000,000 250,000,000 248,000,000 249,000,000 248,000,000 242,000,000 241,000,000 238,000,000 234,000,000 228,000,000 225,000,000 222,000,000 221,000,000 217,000,000 211,000,000 210,000,000 207,000,000 202,000,000 201,000,000 200,000,000 193,000,000 194,000,000 187,000,000 183,000,000 181,000,000 178,000,000 175,000,000 178,000,000 194,000,000 195,000,000 194,000,000 194,000,000 190,000,000 187,000,000 184,000,000 185,000,000 182,000,000 174,000,000 151,000,000 180,000,000 178,000,000  
      taxes other than income taxes
    138,000,000 164,000,000 131,000,000 144,000,000 131,000,000 150,000,000 131,000,000 135,000,000 124,000,000 147,000,000 124,000,000 127,000,000 124,000,000 144,000,000 129,000,000 142,000,000 142,000,000 122,000,000 128,000,000 111,000,000 128,000,000 119,000,000 125,000,000 106,000,000 131,000,000 118,000,000 126,000,000 109,000,000 127,000,000 122,000,000 125,000,000 113,000,000 129,000,000 117,000,000 118,000,000 109,000,000 129,000,000 115,000,000 114,000,000 104,000,000 128,000,000 116,000,000 125,000,000 106,000,000 121,000,000 114,000,000 127,000,000 104,000,000 121,000,000 111,000,000 109,000,000 125,000,000 114,000,000 117,000,000 100,000,000 118,000,000 101,000,000 104,000,000 97,000,000 110,000,000 93,000,000 98,000,000 89,000,000  
      total operating expenses
    1,422,000,000 1,874,000,000 1,810,000,000 1,667,000,000 1,743,000,000 1,587,000,000 1,332,000,000 1,445,000,000 1,354,000,000 1,446,000,000 1,431,000,000 1,711,000,000 1,770,000,000 1,707,000,000 1,417,000,000 1,548,000,000 1,277,000,000 1,186,000,000 1,250,000,000 1,117,000,000 1,134,000,000 1,044,000,000 1,199,000,000 1,137,000,000 1,139,000,000 1,099,000,000 1,268,000,000 1,253,000,000 1,191,000,000 1,178,000,000 1,312,000,000 1,177,000,000 1,142,000,000 1,140,000,000 1,260,000,000 1,211,000,000 1,168,000,000 1,102,000,000 1,214,000,000 1,168,000,000 1,207,000,000 1,164,000,000 1,300,000,000 1,245,000,000 1,109,000,000 1,097,000,000 1,348,000,000 1,151,000,000 1,071,000,000 1,142,000,000 1,465,000,000 1,677,000,000 1,566,000,000 2,165,000,000 1,373,000,000 1,618,000,000 1,430,000,000 1,330,000,000 1,319,000,000 1,595,000,000 1,739,000,000 1,632,000,000 1,347,000,000  
      operating income
    360,000,000 825,000,000 411,000,000 430,000,000 198,000,000 586,000,000 361,000,000 371,000,000 264,000,000 614,000,000 329,000,000 351,000,000 276,000,000 599,000,000 309,000,000 331,000,000 534,000,000 286,000,000 316,000,000 211,000,000 494,000,000 354,000,000 241,000,000 179,000,000 520,000,000 280,000,000 288,000,000 166,000,000 533,000,000 385,000,000 273,000,000 225,000,000 581,000,000 398,000,000 254,000,000 145,000,000 691,000,000 325,000,000 220,000,000 140,000,000 626,000,000 237,000,000 256,000,000 125,000,000 561,000,000 322,000,000 246,000,000 171,000,000 567,000,000 261,000,000 316,000,000 227,000,000 198,000,000 89,000,000 331,000,000 298,000,000 245,000,000 485,000,000 365,000,000 321,000,000 169,000,000 428,000,000 441,000,000  
      yoy
    81.82% 40.78% 13.85% 15.90% -25.00% -4.56% 9.73% 5.70% -4.35% 2.50% 6.47% 6.04% -48.31% 109.44% -2.22% 56.87% 8.10% -19.21% 31.12% 17.88% -5.00% 26.43% -16.32% 7.83% -2.44% -27.27% 5.49% -26.22% -8.26% -3.27% 7.48% 55.17% -15.92% 22.46% 15.45% 3.57% 10.38% 37.13% -14.06% 12.00% 11.59% -26.40% 4.07% -26.90% -1.06% 23.37% -22.15% -24.67% 186.36% 193.26% -4.53% -23.83% -19.18% -81.65% -9.32% -7.17% 44.97% 13.32% -17.23%      
      qoq
    -56.36% 100.73% -4.42% 117.17% -66.21% 62.33% -2.70% 40.53% -57.00% 86.63% -6.27% 27.17% -53.92% 93.85% -6.65% -38.01% 86.71% -9.49% 49.76% -57.29% 39.55% 46.89% 34.64% -65.58% 85.71% -2.78% 73.49% -68.86% 38.44% 41.03% 21.33% -61.27% 45.98% 56.69% 75.17% -79.02% 112.62% 47.73% 57.14% -77.64% 164.14% -7.42% 104.80% -77.72% 74.22% 30.89% 43.86% -69.84% 117.24% -17.41% 39.21% 14.65% 122.47% -73.11% 11.07% 21.63% -49.48% 32.88% 13.71% 89.94% -60.51% -2.95%   
      operating margin %
    20.20% 30.57% 18.51% 20.51% 10.20% 26.97% 21.32% 20.43% 16.32% 29.81% 18.69% 17.02% 13.49% 25.98% 17.90% 17.62% 29.49% 19.43% 20.18% 15.89% 30.34% 25.32% 16.74% 13.60% 31.34% 20.30% 18.51% 11.70% 30.92% 24.63% 17.22% 16.05% 33.72% 25.88% 16.78% 10.69% 37.17% 22.78% 15.34% 10.70% 34.15% 16.92% 16.45% 9.12% 33.59% 22.69% 15.43% 12.93% 34.62% 18.60% 17.74% 11.92% 11.22% 3.95% 19.42% 15.55% 14.63% 26.72% 21.67% 16.75% 8.86% 20.78% 24.66% NaN% 
      other income
    90,000,000 76,000,000 96,000,000 85,000,000 124,000,000 101,000,000 103,000,000 89,000,000 87,000,000 101,000,000 82,000,000 78,000,000 46,000,000 58,000,000 62,000,000 60,000,000 56,000,000 49,000,000 46,000,000 34,000,000 48,000,000 48,000,000 21,000,000 31,000,000 34,000,000 36,000,000 29,000,000 18,000,000 32,000,000 29,000,000 23,000,000                                  
      interest charges
    206,000,000 208,000,000 187,000,000 175,000,000 171,000,000 173,000,000 165,000,000 154,000,000 153,000,000 152,000,000 134,000,000 127,000,000 130,000,000 126,000,000 126,000,000 104,000,000 94,000,000 96,000,000 100,000,000 108,000,000 110,000,000 108,000,000 93,000,000 91,000,000 96,000,000 97,000,000 97,000,000 99,000,000 101,000,000 100,000,000 101,000,000 96,000,000 97,000,000 99,000,000 99,000,000 95,000,000 97,000,000 95,000,000 95,000,000 91,000,000 87,000,000 89,000,000 88,000,000 75,000,000 85,000,000 89,000,000 92,000,000 109,000,000 88,000,000 100,000,000 104,000,000 119,000,000 120,000,000 130,000,000 115,000,000 132,000,000 132,000,000 134,000,000 124,000,000 118,000,000 109,000,000 113,000,000 118,000,000  
      income before income taxes
    244,000,000 693,000,000 320,000,000 340,000,000 151,000,000 514,000,000 299,000,000 306,000,000 198,000,000 563,000,000 277,000,000 302,000,000 192,000,000 531,000,000 245,000,000 287,000,000 496,000,000 239,000,000 262,000,000 137,000,000 432,000,000 294,000,000 169,000,000 119,000,000 458,000,000 219,000,000 220,000,000 85,000,000 464,000,000 314,000,000 195,000,000 141,000,000 495,000,000 308,000,000 161,000,000 59,000,000 604,000,000 240,000,000 138,000,000 61,000,000 553,000,000 158,000,000 176,000,000 67,000,000 490,000,000 250,000,000 163,000,000 72,000,000 494,000,000 172,000,000 224,000,000 119,000,000 84,000,000 -27,000,000 238,000,000 181,000,000 126,000,000 364,000,000 251,000,000 215,000,000     
      income taxes
    -9,000,000 52,000,000 43,000,000 50,000,000 -57,000,000 57,000,000 39,000,000 44,000,000 39,000,000 69,000,000 38,000,000 37,000,000 28,000,000 78,000,000 36,000,000 34,000,000 70,000,000 31,000,000 27,000,000 21,000,000 63,000,000 50,000,000 21,000,000 24,000,000 92,000,000 39,000,000 27,000,000 16,000,000 105,000,000 74,000,000 42,000,000 200,000,000 205,000,000 114,000,000 57,000,000 26,000,000 233,000,000 92,000,000 31,000,000 30,000,000 208,000,000 59,000,000 66,000,000 20,000,000 194,000,000 99,000,000 64,000,000 23,000,000 187,000,000 66,000,000 85,000,000 45,000,000 30,000,000 137,000,000 83,000,000 75,000,000 44,000,000 135,000,000 83,000,000 70,000,000 8,000,000 113,000,000 119,000,000  
      net income
    253,000,000 641,000,000 277,000,000 290,000,000 208,000,000 457,000,000 260,000,000 262,000,000 159,000,000 494,000,000 239,000,000 265,000,000 164,000,000 453,000,000 209,000,000 253,000,000 426,000,000 208,000,000 235,000,000 116,000,000 369,000,000 244,000,000 148,000,000 95,000,000 366,000,000 180,000,000 193,000,000 69,000,000 359,000,000 240,000,000 153,000,000 -59,000,000 290,000,000 194,000,000 104,000,000 33,000,000 371,000,000 148,000,000 107,000,000 30,000,000 345,000,000 151,000,000 110,000,000 49,000,000 295,000,000 150,000,000 98,000,000 38,000,000 304,000,000 96,000,000 139,000,000 74,000,000 54,000,000 -164,000,000 155,000,000 106,000,000 82,000,000 229,000,000 168,000,000 145,000,000 57,000,000 204,000,000 206,000,000  
      yoy
    21.63% 40.26% 6.54% 10.69% 30.82% -7.49% 8.79% -1.13% -3.05% 9.05% 14.35% 4.74% -61.50% 117.79% -11.06% 118.10% 15.45% -14.75% 58.78% 22.11% 0.82% 35.56% -23.32% 37.68% 1.95% -25.00% 26.14% -216.95% 23.79% 23.71% 47.12% -278.79% -21.83% 31.08% -2.80% 10.00% 7.54% -1.99% -2.73% -38.78% 16.95% 0.67% 12.24% 28.95% -2.96% 56.25% -29.50% -48.65% 462.96% -158.54% -10.32% -30.19% -34.15% -171.62% -7.74% -26.90% 43.86% 12.25% -18.45%      
      qoq
    -60.53% 131.41% -4.48% 39.42% -54.49% 75.77% -0.76% 64.78% -67.81% 106.69% -9.81% 61.59% -63.80% 116.75% -17.39% -40.61% 104.81% -11.49% 102.59% -68.56% 51.23% 64.86% 55.79% -74.04% 103.33% -6.74% 179.71% -80.78% 49.58% 56.86% -359.32% -120.34% 49.48% 86.54% 215.15% -91.11% 150.68% 38.32% 256.67% -91.30% 128.48% 37.27% 124.49% -83.39% 96.67% 53.06% 157.89% -87.50% 216.67% -30.94% 87.84% 37.04% -132.93% -205.81% 46.23% 29.27% -64.19% 36.31% 15.86% 154.39% -72.06% -0.97%   
      net income margin %
    14.20% 23.75% 12.47% 13.83% 10.72% 21.03% 15.36% 14.43% 9.83% 23.98% 13.58% 12.85% 8.02% 19.64% 12.11% 13.46% 23.52% 14.13% 15.01% 8.73% 22.67% 17.45% 10.28% 7.22% 22.06% 13.05% 12.40% 4.86% 20.82% 15.36% 9.65% -4.21% 16.83% 12.61% 6.87% 2.43% 19.96% 10.37% 7.46% 2.29% 18.82% 10.78% 7.07% 3.58% 17.66% 10.57% 6.15% 2.87% 18.56% 6.84% 7.80% 3.89% 3.06% -7.28% 9.10% 5.53% 4.90% 12.62% 9.98% 7.57% 2.99% 9.90% 11.52% NaN% 
      less: net income attributable to noncontrolling interests
    1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,250,000 2,000,000 1,000,000 2,000,000                1,000,000 3,000,000 2,000,000 3,000,000 3,000,000 4,000,000 3,000,000 2,000,000 3,000,000 4,000,000     
      net income attributable to ameren common shareholders
    252,000,000 640,000,000 275,000,000 289,000,000 207,000,000 456,000,000 258,000,000 261,000,000 158,000,000 493,000,000 237,000,000 264,000,000 163,000,000 452,000,000 207,000,000 252,000,000 425,000,000 207,000,000 233,000,000 115,000,000 367,000,000 243,000,000 146,000,000 94,000,000 364,000,000 179,000,000 191,000,000 68,000,000 357,000,000 239,000,000 151,000,000 -60,000,000 288,000,000 193,000,000 102,000,000 32,000,000 369,000,000 147,000,000 105,000,000                          
      other comprehensive income, net of taxes
                                                                    
      pension and other postretirement benefit plan activity, net of income taxes (benefit) of —, —, (1), and (1) respectively
    -500,000                                                                
      unrealized net loss on derivative hedging instruments, net of income taxes (benefit) of —, —, (1), and —, respectively
    -1,500,000                                                                
      comprehensive income
    267,000,000 641,000,000 273,000,000 286,000,000 212,000,000 456,000,000 258,000,000 261,000,000 157,000,000 493,000,000 238,000,000 264,000,000 149,000,000 453,000,000 209,000,000 254,000,000 427,000,000 207,000,000 236,000,000 130,000,000 370,000,000 244,000,000 149,000,000 99,000,000 366,000,000 180,000,000 194,000,000 64,000,000 361,000,000 238,000,000 154,000,000                                  
      less: comprehensive income attributable to noncontrolling interests
    1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 1,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000                                  
      comprehensive income attributable to ameren common shareholders
    266,000,000 640,000,000 271,000,000 285,000,000 211,000,000 455,000,000 256,000,000 260,000,000 156,000,000 492,000,000 236,000,000 263,000,000 148,000,000 452,000,000 207,000,000 253,000,000 426,000,000 206,000,000 234,000,000 129,000,000 368,000,000 243,000,000 147,000,000 98,000,000 364,000,000 179,000,000 192,000,000 63,000,000 359,000,000 237,000,000 152,000,000                                  
      earnings per common share - basic
    1,115,000 2,370,000 1,020,000                                                              
      earnings per common share – diluted
    920,000 2,350,000 1,010,000  770,000 1,700,000 970,000 980,000 600,000 1,870,000 900,000 1,000,000 630,000 1,740,000 800,000 970,000 1,650,000 800,000 910,000 460,000 1,470,000 980,000  380,000 1,470,000 720,000  280,000 1,450,000 970,000  -250,000 1,180,000   120,000 1,520,000   120,000 1,410,000   200,000 1,200,000   150,000 1,240,000                
      weighted-average common shares outstanding – basic
    270,500,000 270,400,000 270,300,000 270,000,000 266,800,000 266,800,000 266,700,000 266,400,000 262,800,000 262,800,000 262,600,000 262,200,000 258,400,000 258,400,000 258,200,000 257,900,000 257,300,000 256,100,000 254,400,000 247,000,000 247,100,000 246,900,000 246,400,000 245,600,000 245,900,000 245,600,000 244,900,000 243,800,000 244,100,000 243,700,000 242,900,000                                  
      weighted-average common shares outstanding – diluted
    272,200,000 272,200,000 271,600,000 271,400,000 267,400,000 267,300,000 266,800,000 266,800,000 263,400,000 263,400,000 263,200,000 263,100,000 259,500,000 259,500,000 259,400,000 259,000,000 258,600,000 257,200,000 255,900,000 248,700,000 249,200,000 247,900,000 248,100,000 247,100,000 247,500,000 247,200,000 246,400,000 245,800,000 246,300,000 245,800,000                                   
      other comprehensive loss, net of taxes
                                                                    
      pension and other postretirement benefit plan activity, net of income taxes (benefit) of (1), (1), (1), and (1) respectively
      -2,000,000                                                              
      unrealized net loss on derivative hedging instruments, net of income taxes (benefit) of (1), —, (1), and —, respectively
      -2,000,000                                                              
      pension and other postretirement benefit plan activity, net of income taxes (benefit) of — and —, respectively
           -1,000,000                                                         
      unrealized net loss on derivative hedging instruments, net of income taxes (benefit) of —, and —, respectively
       -4,000,000                                                             
      earnings per common share - basic and diluted
       1,070,000                                                             
      pension and other postretirement benefit plan activity, net of income taxes (benefit) of —, (1), (1), and (1), respectively
        -1,000,000 -1,000,000                                                           
      earnings per common share – basic
        770,000 1,710,000 970,000 980,000 600,000 1,880,000 900,000 1,010,000 630,000 1,750,000 800,000 980,000 1,660,000 810,000 920,000 470,000 1,480,000 990,000  380,000 1,480,000 730,000  280,000 1,460,000 980,000  -240,000 1,190,000   130,000 1,520,000   120,000 1,420,000 610,000 450,000 200,000 1,210,000 610,000 400,000 150,000 1,250,000                
      pension and other postretirement benefit plan activity, net of income taxes (benefit) of (1), —, (1), and —, respectively
          -2,000,000  -750,000 -1,000,000                                                       
      fuel
            91,000,000 158,000,000 152,000,000 113,000,000 97,000,000 117,000,000 83,000,000 176,000,000 184,000,000 173,000,000 65,000,000 90,000,000 141,000,000 119,000,000 140,000,000 126,000,000 147,000,000 102,000,000 160,000,000 179,000,000 216,000,000 186,000,000 188,000,000 143,000,000 199,000,000 189,000,000 206,000,000 171,000,000 205,000,000 166,000,000 203,000,000 208,000,000 259,000,000 205,000,000 206,000,000 188,000,000 236,000,000 198,000,000 204,000,000 197,000,000 222,000,000 213,000,000 371,000,000 379,000,000 350,000,000 394,000,000 286,000,000 293,000,000 274,000,000 306,000,000 287,000,000 274,000,000 312,000,000 461,000,000 200,000,000  
      purchased power
            203,000,000 272,000,000 328,000,000 495,000,000 489,000,000 563,000,000 318,000,000 177,000,000 159,000,000 129,000,000 191,000,000 130,000,000 140,000,000 109,000,000 134,000,000 116,000,000 148,000,000 136,000,000 156,000,000 128,000,000 148,000,000 142,000,000 163,000,000 147,000,000 162,000,000 149,000,000 180,000,000 170,000,000 178,000,000 135,000,000 138,000,000 121,000,000 153,000,000 101,000,000 139,000,000 119,000,000 112,000,000 111,000,000 112,000,000 102,000,000 128,000,000 121,000,000 237,000,000 227,000,000 191,000,000 376,000,000 268,000,000 271,000,000 201,000,000 256,000,000 219,000,000 233,000,000 246,000,000 371,000,000 306,000,000  
      pension and other postretirement benefit plan activity, net of income taxes of —, —, —, and —, respectively
              -1,000,000  250,000    1,000,000 -1,000,000  500,000 1,000,000                                            
      pension and other postretirement benefit plan activity, net of income taxes of — and —, respectively
               -1,000,000    1,000,000   1,000,000                                              
      pension and other postretirement benefit plan activity, net of income taxes of - and -, respectively
                          1,000,000        1,000,000                                  
      earnings per common share – basic and diluted
                          590,000    780,000    620,000   790,000 420,000   610,000 430,000            570,000 290,000 210,000 -700,000 640,000 430,000 300,000 1,040,000 770,000 660,000 270,000 970,000 980,000  
      pension and other postretirement benefit plan activity, net of income taxes of -, -, -, and -, respectively
                           250,000                                         
      pension and other postretirement benefit plan activity, net of income taxes of -, and -, respectively
                              1,000,000                                      
      pension and other postretirement benefit plan activity, net of income taxes of -, -, -, and 1, respectively
                               250,000 2,000,000                                    
      dividends per common share
                               343,125 457,500 457,500 457,500 458,000 440,000 440,000 440,000 440,000 425,000 425,000 425,000 425,000 410,000 410,000 410,000 410,000 400,000 400,000 400,000 400,000 400,000 400,000 385,000 385,000 385,000 385,000 385,000 385,000 385,000 385,000 385,000 385,000 635,000 635,000 635,000  
      pension and other postretirement benefit plan activity, net of income taxes of -, 1, -, and 1, respectively
                                 -2,000,000                                   
      other income and expenses:
                                                                    
      miscellaneous income
                                   17,000,000 13,000,000 14,000,000 15,000,000 20,000,000 18,000,000 16,000,000 20,000,000 20,000,000 19,000,000 16,000,000 19,000,000 19,000,000 21,000,000 21,000,000 18,000,000 18,000,000 20,000,000 16,000,000 17,000,000 16,000,000 20,000,000 24,000,000 24,000,000 22,000,000 22,000,000 16,000,000 17,000,000 16,000,000 19,000,000 23,000,000 21,000,000  
      miscellaneous expense
                                   5,000,000 2,000,000 5,000,000 9,000,000 11,000,000 8,000,000 6,000,000 7,000,000 8,000,000 5,000,000 6,000,000 11,000,000 2,000,000 7,000,000 4,000,000 9,000,000 8,000,000 5,000,000 5,000,000 5,000,000 5,000,000 14,000,000 10,000,000 2,000,000 7,000,000 -9,000,000    -8,000,000 -10,000,000 -8,000,000  
      total other income
                                   12,000,000 11,000,000 9,000,000 6,000,000 9,000,000 10,000,000 10,000,000 13,000,000 12,000,000 14,000,000 10,000,000 8,000,000 17,000,000 14,000,000 17,000,000 9,000,000 10,000,000 15,000,000 11,000,000 12,000,000 11,000,000 6,000,000 14,000,000 22,000,000 15,000,000 13,000,000 13,000,000 10,000,000 12,000,000 11,000,000 13,000,000 13,000,000  
      average common shares outstanding – basic
                                    242,600,000 242,600,000 242,600,000  242,600,000 242,600,000 242,600,000  242,600,000 242,600,000 242,600,000  242,600,000 242,600,000 242,600,000                  
      average common shares outstanding – diluted
                                   200,000 244,700,000   400,000 242,900,000   -200,000 243,900,000   100,000 244,300,000                    
      gas
                                      308,000,000 154,750,000 134,000,000 153,000,000 332,000,000 221,000,000 133,000,000 151,000,000 413,000,000 321,000,000 147,000,000 184,000,000 488,000,000 313,000,000 131,000,000 175,000,000 167,000,000 434,000,000 338,000,000 132,000,000 171,000,000 476,000,000 355,000,000 136,000,000 169,000,000 521,000,000 485,000,000 132,000,000 243,000,000  
      gas purchased for resale
                                      130,000,000 56,750,000 34,000,000 41,000,000 152,000,000 95,000,000 38,000,000 46,000,000 236,000,000 183,000,000 49,000,000 79,000,000 304,000,000 182,000,000 42,000,000 72,000,000 79,000,000 288,000,000 202,000,000 51,000,000 83,000,000 333,000,000 226,000,000 57,000,000 83,000,000 383,000,000 360,000,000 73,000,000 165,000,000  
      provision for callaway construction and operating license
                                           17,250,000  69,000,000                       
      other income and expense:
                                                                    
      income from continuing operations
                                       33,000,000 371,000,000 148,000,000 107,000,000 31,000,000 345,000,000 99,000,000 110,000,000 47,000,000 296,000,000 151,000,000 99,000,000 49,000,000 307,000,000 106,000,000               
      income from discontinued operations, net of taxes
                                           -1,000,000  52,000,000    -1,000,000  -11,000,000 -3,000,000 -10,000,000               
      less: net income from continuing operations attributable to noncontrolling interests
                                       1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,000,000 2,000,000 1,250,000 2,000,000 1,000,000 2,000,000                  
      net income attributable to ameren common shareholders:
                                                                    
      continuing operations
                                       32,000,000 369,000,000 147,000,000 105,000,000 30,000,000 343,000,000 98,000,000 108,000,000 -535,000,000 294,000,000 150,000,000 97,000,000 1,000,000 2,000,000 1,000,000               
      discontinued operations
                                           -1,000,000  52,000,000  -750,000 -1,000,000 -1,000,000 -1,000,000                  
      earnings per common share – basic:
                                                                    
      earnings per common share – diluted:
                                                                    
      earnings per common share – basic and diluted:
                                                                    
      net income attributable to ameren common stockholders:
                                                                    
      net income attributable to ameren common stockholders
                                           150,250,000 343,000,000                        
      net income attributable to ameren corporation:
                                                                    
      net income attributable to ameren corporation
                                             150,000,000 108,000,000 48,000,000 293,000,000 149,000,000 96,000,000 37,000,000 302,000,000 95,000,000 138,000,000 71,000,000 52,000,000 -167,000,000 152,000,000 102,000,000 79,000,000 227,000,000 165,000,000 141,000,000     
      loss from discontinued operations, net of taxes
                                               -750,000 -1,000,000  -1,000,000                  
      less: net income attributable to noncontrolling interests:
                                                                    
      average common shares outstanding - basic
                                                   60,650,000 242,600,000                
      average common shares outstanding - diluted
                                                   61,100,000 245,100,000                
      net income per common share – basic and diluted
                                                     390,000               
      average common shares outstanding
                                                     242,600,000 241,200,000 240,600,000 400,000 239,300,000 238,400,000 237,600,000 5,500,000 218,200,000 213,600,000 212,700,000 600,000 210,300,000 209,500,000  
      goodwill and other impairment losses
                                                         589,000,000           
      coal contract settlement
                                                                -15,000,000  -60,000,000  
      income before income taxes, minority interest
                                                                    
      and preferred dividends of subsidiaries
                                                                225,000,000 328,000,000 336,000,000  
      income before minority interest and preferred
                                                                    
      dividends of subsidiaries
                                                                145,250,000 215,000,000 217,000,000  
      minority interest and preferred dividends of subsidiaries
                                                                6,000,000 11,000,000 11,000,000  
      ·
                                                                    
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-12-31 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 2021-09-30 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 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2005-06-30 2004-12-31 
                                                                                
        assets
                                                                                
        current assets:
                                                                                
        cash and cash equivalents
      13,000,000 9,000,000 11,000,000 23,000,000 7,000,000 17,000,000 19,000,000 85,000,000 25,000,000 8,000,000 7,000,000 10,000,000 10,000,000 7,000,000 7,000,000 7,000,000 7,000,000 99,000,000 6,000,000 139,000,000 6,000,000 8,000,000 42,000,000 16,000,000 20,000,000 6,000,000 8,000,000 16,000,000 11,000,000 29,000,000 30,000,000 10,000,000 9,000,000 10,000,000 8,000,000 9,000,000 18,000,000 13,000,000 13,000,000 292,000,000 72,000,000 2,000,000 6,000,000 5,000,000 13,000,000 46,000,000 26,000,000 30,000,000 169,000,000 150,000,000 573,000,000 378,000,000 573,000,000 545,000,000 608,000,000 506,000,000 360,000,000 622,000,000 563,000,000 251,000,000 304,000,000 92,000,000 206,000,000 205,000,000 186,000,000 355 170,000,000 687,000,000 161,000,000 137,000,000 34,000,000 51,000,000 27,000,000 69,000,000 
        accounts receivable – trade
      665,000,000 794,000,000 567,000,000 667,000,000 525,000,000 651,000,000 514,000,000 507,000,000 494,000,000 597,000,000 482,000,000 625,000,000 600,000,000 665,000,000 519,000,000 560,000,000 515,000,000 397,000,000 464,000,000 415,000,000 525,000,000 486,000,000 456,000,000 393,000,000 478,000,000 461,000,000 517,000,000 463,000,000 605,000,000 560,000,000 514,000,000 445,000,000 507,000,000 446,000,000 457,000,000 437,000,000 543,000,000 445,000,000 428,000,000 388,000,000 508,000,000 456,000,000 524,000,000 423,000,000 467,000,000 454,000,000 553,000,000 404,000,000 469,000,000 425,000,000 517,000,000 507,000,000 517,000,000 500,000,000 496,000,000 466,000,000 500,000,000 434,000,000 416,000,000 450,000,000 554,000,000 502,000,000    570         
        unbilled revenue
      415,000,000 413,000,000 467,000,000 253,000,000 346,000,000 348,000,000 407,000,000 272,000,000 319,000,000 360,000,000 378,000,000 299,000,000 446,000,000 366,000,000 400,000,000 283,000,000 332,000,000 339,000,000 210,000,000 269,000,000 221,000,000 323,000,000 212,000,000 278,000,000 273,000,000 326,000,000 238,000,000 295,000,000 260,000,000 371,000,000 258,000,000 323,000,000 262,000,000 334,000,000 228,000,000 295,000,000 240,000,000 328,000,000 186,000,000 239,000,000 234,000,000 302,000,000 212,000,000 265,000,000 203,000,000 299,000,000 236,000,000 304,000,000 226,000,000 308,000,000 310,000,000 368,000,000 310,000,000 406,000,000 313,000,000 414,000,000 253,000,000 367,000,000 250,000,000 365,000,000 247,000,000 427,000,000 262,000,000 389,000,000 318,000,000 359 263,000,000 304,000,000 216,000,000 309,000,000 267,000,000 355,000,000 378,000,000 336,000,000 
        miscellaneous accounts receivable
      107,000,000 78,000,000 101,000,000 327,000,000 96,000,000 70,000,000 62,000,000 82,000,000 106,000,000 65,000,000 63,000,000 62,000,000 54,000,000 62,000,000 81,000,000 87,000,000 111,000,000 105,000,000 61,000,000 65,000,000 71,000,000 76,000,000 65,000,000 63,000,000 56,000,000 91,000,000 74,000,000 79,000,000 84,000,000 74,000,000 98,000,000  85,000,000 77,000,000 67,000,000  49,000,000 65,000,000                                     
        inventories
      774,000,000 804,000,000 738,000,000 669,000,000 762,000,000 792,000,000 740,000,000 679,000,000 733,000,000 760,000,000 711,000,000 630,000,000 667,000,000 695,000,000 600,000,000 520,000,000 595,000,000 527,000,000 467,000,000 521,000,000 557,000,000 514,000,000 471,000,000 494,000,000 488,000,000 433,000,000 402,000,000 483,000,000 525,000,000 475,000,000 453,000,000 522,000,000 547,000,000 512,000,000 467,000,000 527,000,000                                       
        current regulatory assets
      387,000,000 260,000,000 332,000,000 340,000,000 366,000,000 226,000,000 345,000,000 356,000,000 365,000,000 157,000,000 239,000,000 292,000,000 354,000,000 346,000,000 333,000,000 244,000,000 359,000,000 353,000,000 367,000,000 109,000,000  82,000,000 91,000,000 69,000,000 74,000,000 107,000,000 113,000,000 134,000,000 72,000,000 104,000,000 130,000,000 144,000,000 75,000,000 95,000,000 118,000,000 149,000,000 107,000,000 146,000,000 215,000,000 260,000,000 163,000,000 223,000,000 265,000,000 295,000,000 199,000,000 202,000,000 220,000,000 156,000,000 173,000,000 192,000,000 215,000,000 184,000,000 215,000,000 267,000,000 313,000,000 274,000,000 242,000,000                  
        other current assets
      210,000,000 252,000,000 258,000,000 176,000,000 162,000,000 153,000,000 130,000,000 103,000,000 125,000,000 124,000,000 119,000,000 115,000,000 155,000,000 232,000,000 77,000,000 83,000,000 285,000,000 165,000,000 114,000,000 135,000,000 210,000,000 131,000,000 127,000,000 118,000,000 106,000,000 90,000,000 70,000,000 63,000,000 83,000,000 72,000,000 84,000,000 98,000,000 96,000,000 97,000,000 105,000,000 98,000,000 76,000,000 68,000,000 63,000,000 88,000,000 103,000,000 95,000,000 91,000,000 86,000,000 66,000,000 68,000,000 70,000,000 85,000,000 108,000,000 104,000,000 100,000,000 104,000,000 100,000,000 109,000,000 96,000,000 120,000,000 116,000,000 208,000,000 273,000,000 251,000,000 194,000,000 153,000,000 326,000,000 275,000,000 272,000,000 181 202,000,000 178,000,000 130,000,000 203,000,000 147,000,000 110,000,000 70,000,000 74,000,000 
        total current assets
      2,571,000,000 2,610,000,000 2,474,000,000 2,455,000,000 2,264,000,000 2,257,000,000 2,217,000,000 2,084,000,000 2,181,000,000 2,084,000,000 2,019,000,000 2,062,000,000 2,668,000,000 2,518,000,000 2,396,000,000 2,031,000,000 2,204,000,000 2,116,000,000 1,823,000,000 1,653,000,000 1,590,000,000 1,620,000,000 1,464,000,000 1,431,000,000 1,495,000,000 1,514,000,000 1,422,000,000 1,533,000,000 1,640,000,000 1,685,000,000 1,567,000,000 1,612,000,000 1,581,000,000 1,571,000,000 1,450,000,000 1,593,000,000 1,599,000,000 1,594,000,000 1,458,000,000 1,917,000,000 1,983,000,000 1,991,000,000 1,993,000,000 2,046,000,000 1,942,000,000 1,965,000,000 1,840,000,000 1,972,000,000 3,273,000,000 3,408,000,000 2,715,000,000 2,603,000,000 2,715,000,000 2,894,000,000 3,120,000,000 2,830,000,000 2,658,000,000 2,842,000,000 2,780,000,000 2,664,000,000 2,757,000,000 2,515,000,000 2,547,000,000 2,766,000,000 2,303,000,000 2,480 2,341,000,000 2,565,000,000 1,860,000,000 1,874,000,000 1,737,000,000 1,545,000,000 1,565,000,000 1,582,000,000 
        property, plant, and equipment
      39,313,000,000 38,411,000,000 37,816,000,000 37,010,000,000 36,304,000,000 35,720,000,000 34,873,000,000 34,114,000,000 33,776,000,000 32,938,000,000 32,351,000,000 31,735,000,000 31,262,000,000 30,608,000,000 30,086,000,000 29,578,000,000 28,559,000,000 28,020,000,000 27,307,000,000 26,807,000,000 25,541,000,000 25,081,000,000 24,678,000,000 24,376,000,000 23,894,000,000 23,479,000,000 23,044,000,000 22,810,000,000 22,379,000,000 21,998,000,000 21,666,000,000 21,466,000,000 20,906,000,000 20,589,000,000 20,298,000,000 20,113,000,000                                       
        investments and other assets:
                                                                                
        nuclear decommissioning trust fund
      1,526,000,000 1,502,000,000 1,414,000,000 1,312,000,000 1,342,000,000 1,333,000,000 1,266,000,000 1,232,000,000 1,150,000,000 1,042,000,000 1,075,000,000 1,019,000,000 958,000,000 910,000,000 957,000,000 1,094,000,000 1,076,000,000 1,070,000,000 1,010,000,000 982,000,000 904,000,000 854,000,000 742,000,000 847,000,000 798,000,000 783,000,000 754,000,000 684,000,000 752,000,000 714,000,000 698,000,000 704,000,000 672,000,000 651,000,000 635,000,000 607,000,000 599,000,000 582,000,000 567,000,000 556,000,000 534,000,000 555,000,000 558,000,000 549,000,000 529,000,000 523,000,000 503,000,000 494,000,000 459,000,000 442,000,000 353,000,000 356,000,000 353,000,000 337,000,000 315,000,000 289,000,000 307,000,000 293,000,000 280,000,000 249,000,000 223,000,000 239,000,000 269,000,000 284,000,000 291,000,000 307 301,000,000 301,000,000 288,000,000 285,000,000 271,000,000 257,000,000 238,000,000 235,000,000 
        goodwill
      411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 411,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831,000,000 831 831,000,000 831,000,000 831,000,000 830,000,000 976,000,000 976,000,000   
        regulatory assets
      2,524,000,000 2,611,000,000 2,666,000,000 2,569,000,000 2,397,000,000 1,915,000,000 1,952,000,000 1,904,000,000 1,810,000,000 1,772,000,000 1,790,000,000 1,599,000,000 1,426,000,000 1,405,000,000 1,487,000,000 1,377,000,000 1,235,000,000 1,272,000,000 1,249,000,000 1,100,000,000 1,078,000,000 1,133,000,000 1,092,000,000 992,000,000 1,168,000,000 1,175,000,000 1,134,000,000 1,127,000,000 1,130,000,000 1,205,000,000 1,205,000,000 1,230,000,000 1,509,000,000 1,506,000,000 1,485,000,000 1,437,000,000 1,312,000,000 1,330,000,000 1,376,000,000 1,382,000,000 1,578,000,000 1,560,000,000 1,577,000,000 1,582,000,000 1,259,000,000 1,213,000,000 1,251,000,000 1,240,000,000 1,729,000,000 1,742,000,000 1,217,000,000 1,224,000,000 1,217,000,000 1,259,000,000 1,422,000,000 1,441,000,000 1,427,000,000 1,430,000,000 1,641,000,000 1,616,000,000 1,682,000,000 1,732,000,000 1,122,000,000 1,081,000,000 1,149,000,000 1,158 1,323,000,000 1,347,000,000 1,421,000,000 1,431,000,000 806,000,000 827,000,000 811,000,000 829,000,000 
        pension and other postretirement benefits
      977,000,000 741,000,000 734,000,000 765,000,000 757,000,000 581,000,000 566,000,000 597,000,000 581,000,000 470,000,000 442,000,000 423,000,000 411,000,000 813,000,000 808,000,000 772,000,000 39,000,000 39,000,000 38,000,000 37,000,000 373,000,000 414,000,000 397,000,000 401,000,000 522,000,000 539,000,000 558,000,000 558,000,000 529,000,000 545,000,000 541,000,000 545,000,000 711,000,000 758,000,000 768,000,000 769,000,000 499,000,000 537,000,000 581,000,000 580,000,000 666,000,000 689,000,000 708,000,000 705,000,000 400,000,000 463,000,000 480,000,000 466,000,000 1,042,000,000 1,140,000,000 1,057,000,000 1,067,000,000 1,057,000,000 1,045,000,000 1,076,000,000 1,132,000,000 1,181,000,000 1,165,000,000 1,477,000,000 1,486,000,000 1,514,000,000 1,495,000,000             
        other assets
      1,154,000,000 1,130,000,000 1,110,000,000 1,143,000,000 1,123,000,000 1,081,000,000 1,049,000,000 964,000,000 921,000,000 882,000,000 859,000,000 815,000,000 768,000,000 992,000,000 963,000,000 934,000,000 1,180,000,000 1,027,000,000 989,000,000 1,077,000,000 993,000,000 917,000,000 885,000,000 876,000,000 780,000,000 741,000,000 744,000,000 650,000,000 647,000,000 626,000,000 532,000,000 522,000,000 538,000,000 526,000,000 532,000,000 538,000,000 566,000,000 552,000,000 573,000,000 575,000,000 646,000,000 649,000,000 645,000,000 664,000,000 724,000,000 731,000,000 719,000,000 698,000,000 660,000,000 654,000,000 738,000,000 848,000,000 738,000,000 754,000,000 699,000,000 664,000,000 670,000,000 655,000,000 652,000,000 674,000,000 637,000,000 606,000,000 566,000,000 940,000,000 701,000,000 685 683,000,000 730,000,000 650,000,000 642,000,000 753,000,000 643,000,000 411,000,000 411,000,000 
        total investments and other assets
      6,592,000,000 6,395,000,000 6,335,000,000 6,200,000,000 6,030,000,000 5,321,000,000 5,244,000,000 5,108,000,000 4,873,000,000 4,577,000,000 4,577,000,000 4,267,000,000 3,974,000,000 4,531,000,000 4,626,000,000 4,588,000,000 3,902,000,000 3,780,000,000 3,659,000,000 3,570,000,000 3,386,000,000 3,315,000,000 3,130,000,000 3,126,000,000 3,157,000,000 3,110,000,000 3,043,000,000 2,872,000,000 2,940,000,000 2,956,000,000 2,846,000,000 2,867,000,000 3,130,000,000 3,094,000,000 3,063,000,000 2,993,000,000 2,888,000,000 2,875,000,000 2,927,000,000 2,924,000,000 3,169,000,000 3,175,000,000 3,191,000,000 3,206,000,000 2,943,000,000 2,897,000,000 2,901,000,000 2,865,000,000 3,278,000,000 3,267,000,000 2,726,000,000 2,843,000,000 2,726,000,000 2,768,000,000 2,856,000,000 3,338,000,000 3,359,000,000 3,338,000,000 3,542,000,000 3,520,000,000 3,533,000,000 3,575,000,000 2,955,000,000 3,313,000,000 3,161,000,000 3,179 3,335,000,000 3,428,000,000 3,413,000,000 3,418,000,000 3,065,000,000 2,985,000,000   
        total assets
      48,476,000,000 47,416,000,000 46,625,000,000 45,665,000,000 44,598,000,000 43,298,000,000 42,334,000,000 41,306,000,000 40,830,000,000 39,599,000,000 38,947,000,000 38,064,000,000 37,904,000,000 37,657,000,000 37,108,000,000 36,197,000,000 34,665,000,000 33,916,000,000 32,789,000,000 32,030,000,000 30,517,000,000 30,016,000,000 29,272,000,000 28,933,000,000 28,546,000,000 28,103,000,000 27,509,000,000 27,215,000,000 26,959,000,000 26,639,000,000 26,079,000,000 25,945,000,000 25,617,000,000 25,254,000,000 24,811,000,000 24,699,000,000 24,134,000,000 23,793,000,000 23,385,000,000 23,640,000,000 23,459,000,000 23,152,000,000 22,884,000,000 22,676,000,000 21,876,000,000 21,588,000,000 21,166,000,000 21,042,000,000 22,385,000,000 22,276,000,000 23,329,000,000 23,391,000,000 23,329,000,000 23,515,000,000 23,631,000,000 23,915,000,000 23,688,000,000 23,790,000,000 23,594,000,000 23,190,000,000 23,071,000,000 22,657,000,000 21,479,000,000 21,645,000,000 20,758,000,000 20,728 20,405,000,000 20,531,000,000 19,626,000,000 19,578,000,000 18,830,000,000 18,450,000,000 17,491,000,000 17,434,000,000 
        liabilities and equity
                                                                                
        current liabilities:
                                                                                
        current maturities of long-term debt
      973,000,000 29,000,000 29,000,000 17,000,000 317,000,000 300,000,000 799,000,000 1,149,000,000 849,000,000 849,000,000 350,000,000 100,000,000 340,000,000 155,000,000 605,000,000 505,000,000 57,000,000 8,000,000 8,000,000 8,000,000 357,000,000 357,000,000 357,000,000 442,000,000 336,000,000 336,000,000 336,000,000 580,000,000 649,000,000 847,000,000 1,170,000,000 841,000,000 777,000,000 578,000,000 681,000,000 681,000,000 431,000,000 431,000,000 135,000,000 395,000,000 395,000,000 395,000,000 380,000,000 120,000,000 119,000,000 119,000,000 648,000,000 534,000,000 884,000,000 884,000,000 155,000,000 5,000,000 155,000,000 155,000,000 354,000,000 354,000,000 204,000,000 204,000,000 128,000,000 129,000,000 380,000,000 380,000,000 269,000,000 285,000,000 823,000,000 221 203,000,000 203,000,000 303,000,000 456,000,000 465,000,000 124,000,000 350,000,000 423,000,000 
        short-term debt
      643,000,000 903,000,000 1,141,000,000 1,252,000,000 1,143,000,000 1,539,000,000 691,000,000 868,000,000 536,000,000 1,340,000,000 1,329,000,000 1,248,000,000 1,070,000,000 1,221,000,000 1,021,000,000 1,101,000,000 553,000,000 431,000,000 889,000,000 490,000,000 272,000,000 120,000,000 615,000,000 440,000,000 544,000,000 999,000,000 799,000,000 597,000,000 521,000,000 506,000,000 960,000,000 484,000,000 446,000,000 892,000,000 914,000,000 558,000,000 608,000,000 778,000,000 581,000,000 301,000,000 783,000,000 886,000,000 955,000,000 714,000,000 753,000,000 793,000,000 700,000,000 368,000,000  25,000,000 334,000,000 337,000,000 334,000,000 269,000,000 125,000,000   20,000,000 435,000,000 965,000,000 997,000,000 1,174,000,000 1,407,000,000 1,450,000,000 1,617,000,000 1,472 1,202,000,000 1,619,000,000 953,000,000 612,000,000 311,000,000 397,000,000 161,000,000 417,000,000 
        accounts and wages payable
      1,254,000,000 762,000,000 882,000,000 702,000,000 1,059,000,000 717,000,000 774,000,000 647,000,000 1,136,000,000 955,000,000 719,000,000 664,000,000 1,159,000,000 820,000,000 897,000,000 690,000,000 811,000,000 779,000,000 581,000,000 958,000,000 640,000,000 616,000,000 544,000,000 874,000,000 598,000,000 593,000,000 522,000,000 817,000,000 591,000,000 565,000,000 497,000,000 902,000,000 548,000,000 522,000,000 460,000,000 805,000,000 513,000,000 499,000,000 429,000,000 777,000,000 525,000,000 486,000,000 434,000,000 711,000,000 466,000,000 575,000,000 559,000,000 806,000,000 414,000,000 428,000,000 401,000,000 482,000,000 401,000,000 651,000,000 414,000,000 465,000,000 427,000,000 694,000,000 443,000,000 523,000,000 519,000,000 813,000,000 509,000,000 527,000,000 443,000,000 687 415,000,000 455,000,000 454,000,000 671,000,000 382,000,000 404,000,000 370,000,000 567,000,000 
        interest accrued
      229,000,000 183,000,000 230,000,000 159,000,000 196,000,000  177,000,000          103,000,000 129,000,000 84,000,000 114,000,000  118,000,000     81,000,000 93,000,000 108,000,000 109,000,000 97,000,000 99,000,000 106,000,000 104,000,000 100,000,000 93,000,000 110,000,000 102,000,000 99,000,000 89,000,000 103,000,000 98,000,000 94,000,000 85,000,000 105,000,000 92,000,000 104,000,000 86,000,000 120,000,000 100,000,000 153,000,000 107,000,000 153,000,000 107,000,000 174,000,000 123,000,000 165,000,000 110,000,000 183,000,000 126,000,000 167,000,000              
        customer deposits
      238,000,000 248,000,000 240,000,000 223,000,000 223,000,000 205,000,000 197,000,000 190,000,000 176,000,000            109,000,000 126,000,000     111,000,000 116,000,000 126,000,000 114,000,000 115,000,000 108,000,000 108,000,000 108,000,000 106,000,000 107,000,000 104,000,000 100,000,000 98,000,000         105,000,000 106,000,000 110,000,000 100,000,000 100,000,000 100,000,000 100,000,000 99,000,000 98,000,000 97,000,000 101,000,000 107,000,000                
        other current liabilities
      570,000,000 323,000,000 410,000,000 510,000,000 475,000,000 600,000,000 655,000,000 651,000,000 648,000,000 664,000,000 845,000,000 745,000,000 797,000,000 584,000,000 824,000,000 630,000,000 464,000,000 414,000,000 392,000,000 489,000,000 432,000,000 374,000,000 662,000,000 585,000,000 522,000,000 668,000,000 301,000,000 282,000,000 317,000,000 298,000,000 285,000,000 326,000,000 318,000,000 298,000,000 280,000,000 248,000,000 252,000,000 270,000,000 305,000,000 379,000,000 404,000,000 413,000,000 437,000,000 434,000,000 350,000,000 350,000,000 344,000,000 194,000,000 190,000,000 178,000,000 294,000,000 262,000,000 294,000,000 283,000,000 300,000,000 298,000,000 219,000,000 419,000,000 298,000,000 437,000,000 462,000,000 487,000,000 605,000,000 469,000,000 539,000,000 438 548,000,000 423,000,000 402,000,000 405,000,000 433,000,000 386,000,000 363,000,000 374,000,000 
        total current liabilities
      3,907,000,000 2,805,000,000 3,087,000,000 2,863,000,000 3,413,000,000 3,567,000,000 3,293,000,000 3,505,000,000 3,345,000,000 4,017,000,000 3,243,000,000 2,757,000,000 3,366,000,000 3,175,000,000 3,588,000,000 3,145,000,000 2,357,000,000 2,177,000,000 2,307,000,000 2,180,000,000 2,105,000,000 2,000,000,000 2,367,000,000 2,505,000,000 2,285,000,000 2,752,000,000 2,392,000,000 2,687,000,000 2,580,000,000 2,711,000,000 3,345,000,000 2,940,000,000 2,581,000,000 2,765,000,000 2,762,000,000 2,674,000,000 2,291,000,000 2,430,000,000 1,839,000,000 2,093,000,000 2,489,000,000 2,556,000,000 2,520,000,000 2,249,000,000 2,119,000,000 2,312,000,000 2,725,000,000 2,461,000,000 3,228,000,000 3,286,000,000 1,837,000,000 1,727,000,000 1,837,000,000 1,888,000,000 1,914,000,000 1,760,000,000 1,640,000,000 1,711,000,000 1,926,000,000 2,545,000,000 2,881,000,000 3,063,000,000 2,918,000,000 3,078,000,000 3,510,000,000 2,902 2,504,000,000 2,820,000,000 2,249,000,000 2,202,000,000 1,840,000,000 1,408,000,000 1,380,000,000 1,807,000,000 
        long-term debt
      18,214,000,000 19,172,000,000 18,811,000,000 18,354,000,000 17,262,000,000 16,422,000,000 16,280,000,000 15,167,000,000 15,121,000,000 13,829,000,000 14,328,000,000 14,181,000,000 13,685,000,000 13,577,000,000 12,985,000,000 12,563,000,000 12,444,000,000 12,492,000,000 11,527,000,000 11,078,000,000 10,172,000,000 10,171,000,000 9,378,000,000 8,915,000,000 8,651,000,000 8,222,000,000 8,221,000,000 7,859,000,000 7,614,000,000 7,613,000,000 6,766,000,000 7,094,000,000 6,922,000,000 6,821,000,000 6,597,000,000 6,595,000,000 6,607,000,000 6,605,000,000 6,881,000,000 6,880,000,000 5,981,000,000 5,981,000,000 5,860,000,000 6,120,000,000 5,825,000,000 5,825,000,000 5,226,000,000 5,504,000,000 5,274,000,000 5,274,000,000 6,853,000,000 6,854,000,000 6,853,000,000 6,853,000,000 6,859,000,000 6,963,000,000 7,113,000,000 7,113,000,000 7,321,000,000 7,321,000,000 6,900,000,000 6,554,000,000 6,143,000,000 6,146,000,000 5,066,000,000 5,691 5,486,000,000 5,511,000,000 5,260,000,000 5,285,000,000 5,349,000,000 5,705,000,000 4,929,000,000 5,021,000,000 
        deferred credits and other liabilities:
                                                                                
        accumulated deferred income taxes and production and investment tax credits
      5,181,000,000    4,474,000,000                                                                      
        regulatory liabilities
      6,255,000,000 6,089,000,000 6,014,000,000 5,953,000,000 5,897,000,000 5,562,000,000 5,531,000,000 5,593,000,000 5,512,000,000 5,336,000,000 5,445,000,000 5,395,000,000 5,309,000,000 5,658,000,000 5,727,000,000 5,841,000,000 5,425,000,000 5,258,000,000 5,230,000,000 5,282,000,000 4,972,000,000 4,933,000,000 4,842,000,000 4,887,000,000 4,845,000,000 4,768,000,000 4,731,000,000 4,637,000,000 4,652,000,000 4,540,000,000 4,363,000,000 4,387,000,000 2,045,000,000 2,003,000,000 1,982,000,000 1,985,000,000 1,974,000,000 1,953,000,000 1,931,000,000 1,905,000,000 1,894,000,000 1,912,000,000 1,897,000,000 1,850,000,000 1,805,000,000 1,784,000,000 1,751,000,000 1,705,000,000 1,703,000,000 1,666,000,000 1,371,000,000 1,424,000,000 1,371,000,000 1,319,000,000 1,373,000,000 1,370,000,000 1,340,000,000 1,338,000,000 1,322,000,000 1,307,000,000 1,296,000,000 1,291,000,000 1,291,000,000 1,437,000,000 1,328,000,000 1,240 1,241,000,000 1,216,000,000 1,185,000,000 1,234,000,000 1,205,000,000 1,173,000,000 1,067,000,000 1,042,000,000 
        asset retirement obligations
      849,000,000 844,000,000 838,000,000 830,000,000 822,000,000 798,000,000 791,000,000 779,000,000 772,000,000 761,000,000 775,000,000 769,000,000 763,000,000 771,000,000 774,000,000 769,000,000 705,000,000 712,000,000 705,000,000 696,000,000 675,000,000 639,000,000 631,000,000 638,000,000 671,000,000 667,000,000 630,000,000 627,000,000 640,000,000 641,000,000 636,000,000 638,000,000 631,000,000 634,000,000 641,000,000 635,000,000 636,000,000 629,000,000 625,000,000 618,000,000 597,000,000 589,000,000 500,000,000 396,000,000 385,000,000 380,000,000 373,000,000 369,000,000 392,000,000 385,000,000 482,000,000 487,000,000 482,000,000 475,000,000 448,000,000 441,000,000 435,000,000 429,000,000 423,000,000 418,000,000 412,000,000 406,000,000 583,000,000 576,000,000 569,000,000 562 571,000,000 564,000,000 557,000,000 549,000,000 538,000,000 531,000,000 452,000,000 439,000,000 
        other deferred credits and liabilities
      540,000,000 516,000,000 551,000,000 535,000,000 487,000,000 510,000,000 446,000,000 439,000,000 426,000,000 416,000,000 417,000,000 370,000,000 340,000,000 361,000,000 411,000,000 394,000,000 416,000,000 447,000,000 452,000,000 466,000,000 438,000,000 456,000,000 482,000,000 467,000,000 466,000,000 464,000,000 422,000,000 408,000,000 409,000,000 431,000,000 445,000,000 460,000,000 469,000,000 477,000,000 481,000,000 477,000,000 481,000,000 490,000,000 530,000,000 531,000,000 530,000,000 524,000,000 524,000,000 514,000,000 522,000,000 524,000,000 554,000,000 622,000,000 534,000,000 585,000,000 553,000,000 481,000,000 553,000,000 615,000,000 621,000,000 544,000,000 543,000,000 496,000,000 555,000,000 470,000,000 539,000,000 438,000,000 367,000,000 390,000,000 346,000,000 354 392,000,000 378,000,000 385,000,000 169,000,000 144,000,000 174,000,000 290,000,000 315,000,000 
        total deferred credits and other liabilities
      12,825,000,000 12,530,000,000 12,284,000,000 12,100,000,000 11,680,000,000 11,347,000,000 11,093,000,000 11,062,000,000 10,886,000,000 10,581,000,000 10,550,000,000 10,390,000,000 10,216,000,000 10,575,000,000 10,526,000,000 10,554,000,000 10,050,000,000 9,765,000,000 9,678,000,000 9,692,000,000 9,609,000,000 9,476,000,000 9,300,000,000 9,312,000,000 9,406,000,000 9,196,000,000 9,049,000,000 8,896,000,000 8,967,000,000 8,787,000,000 8,596,000,000 8,585,000,000 8,627,000,000 8,368,000,000 8,246,000,000 8,185,000,000 7,901,000,000 7,694,000,000 7,654,000,000 7,579,000,000 7,833,000,000 7,709,000,000 7,658,000,000 7,452,000,000 7,016,000,000 6,737,000,000 6,560,000,000 6,391,000,000 7,158,000,000 7,191,000,000 6,489,000,000 6,667,000,000 6,489,000,000 6,430,000,000 6,549,000,000 6,302,000,000 6,195,000,000 6,076,000,000 6,301,000,000 5,970,000,000 6,017,000,000 5,861,000,000 5,156,000,000 5,369,000,000 5,194,000,000 5,150 5,428,000,000 5,350,000,000 5,329,000,000 5,279,000,000 4,861,000,000 4,759,000,000   
        commitments and contingencies
                                                                                
        shareholders’ equity:
                                                                                
        common stock, .01 par value...
      3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 3,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000  2,000,000 2,000,000 2,000,000       2,000,000     
        other paid-in capital, principally premium on common stock
      8,106,000,000 7,559,000,000 7,541,000,000 7,524,000,000 7,513,000,000 7,264,000,000 7,246,000,000 7,228,000,000 7,216,000,000 6,900,000,000 6,880,000,000 6,861,000,000 6,860,000,000 6,548,000,000 6,527,000,000 6,507,000,000 6,483,000,000 6,436,000,000 6,295,000,000 6,179,000,000 5,733,000,000 5,716,000,000 5,695,000,000 5,694,000,000 5,673,000,000 5,649,000,000 5,625,000,000 5,627,000,000 5,598,000,000 5,576,000,000 5,546,000,000 5,540,000,000 5,534,000,000 5,528,000,000 5,522,000,000 5,556,000,000 5,550,000,000 5,545,000,000 5,539,000,000 5,616,000,000 5,612,000,000 5,606,000,000 5,600,000,000 5,617,000,000 5,612,000,000 5,607,000,000 5,602,000,000 5,632,000,000 5,624,000,000 5,619,000,000 5,540,000,000 5,559,000,000 5,540,000,000 5,520,000,000 5,496,000,000 5,476,000,000 5,437,000,000 5,412,000,000 5,392,000,000 4,835,000,000 4,812,000,000 4,780,000,000 4,731,000,000 4,693,000,000 4,656,000,000 4,604 4,579,000,000 4,551,000,000 4,521,000,000 4,495,000,000 4,478,000,000 4,457,000,000 4,347,000,000 3,949,000,000 
        retained earnings
      5,292,000,000 5,232,000,000 4,784,000,000 4,702,000,000 4,604,000,000 4,576,000,000 4,299,000,000 4,219,000,000 4,136,000,000 4,144,000,000 3,817,000,000 3,745,000,000 3,646,000,000 3,636,000,000 3,336,000,000 3,282,000,000 3,199,000,000 2,915,000,000 2,850,000,000 2,757,000,000 2,769,000,000 2,525,000,000 2,404,000,000 2,380,000,000 2,408,000,000 2,161,000,000 2,099,000,000 2,024,000,000 2,073,000,000 1,827,000,000 1,699,000,000 1,660,000,000 1,830,000,000 1,649,000,000 1,563,000,000 1,568,000,000 1,643,000,000 1,376,000,000 1,333,000,000 1,331,000,000 1,405,000,000 1,161,000,000 1,111,000,000 1,103,000,000 1,154,000,000 957,000,000 906,000,000 907,000,000 967,000,000 762,000,000 2,203,000,000 2,248,000,000 2,203,000,000 2,225,000,000 2,266,000,000 2,526,000,000 2,466,000,000 2,455,000,000 2,467,000,000 2,323,000,000 2,241,000,000 2,181,000,000 2,259,000,000 2,188,000,000 2,115,000,000 2,110 2,134,000,000 2,023,000,000 2,011,000,000 2,024,000,000 2,094,000,000 1,932,000,000 1,959,000,000 1,904,000,000 
        accumulated other comprehensive loss
       -14,000,000 -14,000,000 -10,000,000 -6,000,000 -10,000,000 -9,000,000 -7,000,000 -6,000,000 -4,000,000 -3,000,000 -2,000,000      -1,000,000  -1,000,000 -15,000,000 -16,000,000 -16,000,000 -17,000,000 -21,000,000 -21,000,000 -21,000,000 -22,000,000 -17,000,000 -19,000,000 -17,000,000 -18,000,000 -21,000,000 -21,000,000 -23,000,000 -23,000,000 -2,000,000 -1,000,000 -5,000,000 -3,000,000 -5,000,000 -5,000,000 -9,000,000      -19,000,000 -9,000,000 -20,000,000 -21,000,000 -20,000,000 -17,000,000 -10,000,000 -13,000,000  -16,000,000 -21,000,000            -23,000,000 -36,000,000 -30,000,000 -45,000,000 
        total shareholders’ equity
      13,401,000,000 12,780,000,000 12,314,000,000 12,219,000,000 12,114,000,000 11,833,000,000 11,539,000,000 11,443,000,000 11,349,000,000 11,043,000,000 10,697,000,000 10,607,000,000 10,508,000,000 10,201,000,000 9,880,000,000 9,806,000,000 9,685,000,000                                                          
        noncontrolling interests
      129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 129,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 142,000,000 151,000,000 151,000,000 155,000,000 155,000,000 155,000,000 154,000,000 155,000,000 209,000,000 209,000,000 207,000,000 206,000,000 207,000,000 212,000,000              
        total equity
      13,530,000,000 12,909,000,000 12,443,000,000 12,348,000,000 12,243,000,000 11,962,000,000 11,668,000,000 11,572,000,000 11,478,000,000 11,172,000,000 10,826,000,000 10,736,000,000 10,637,000,000 10,330,000,000 10,009,000,000 9,935,000,000 9,814,000,000 9,482,000,000 9,277,000,000 9,080,000,000 8,631,000,000 8,369,000,000 8,227,000,000 8,201,000,000 8,204,000,000 7,933,000,000 7,847,000,000 7,773,000,000 7,798,000,000 7,528,000,000 7,372,000,000 7,326,000,000 7,487,000,000 7,300,000,000 7,206,000,000 7,245,000,000 7,335,000,000 7,064,000,000 7,011,000,000 7,088,000,000 7,156,000,000 6,906,000,000 6,846,000,000 6,855,000,000 6,916,000,000 6,714,000,000 6,655,000,000 6,686,000,000 6,725,000,000 6,525,000,000 7,880,000,000 7,943,000,000 7,880,000,000 7,884,000,000 7,909,000,000 8,200,000,000 8,110,000,000 8,060,000,000 8,046,000,000 7,354,000,000 7,273,000,000              
        total liabilities and equity
      48,476,000,000 47,416,000,000 46,625,000,000 45,665,000,000 44,598,000,000 43,298,000,000 42,334,000,000 41,306,000,000 40,830,000,000 39,599,000,000 38,947,000,000 38,064,000,000 37,904,000,000 37,657,000,000 37,108,000,000 36,197,000,000 34,665,000,000 33,916,000,000 32,789,000,000 32,030,000,000 30,517,000,000 30,016,000,000 29,272,000,000 28,933,000,000 28,546,000,000 28,103,000,000 27,509,000,000 27,215,000,000 26,959,000,000 26,639,000,000 26,079,000,000 25,945,000,000 25,617,000,000 25,254,000,000 24,811,000,000 24,699,000,000 24,134,000,000 23,793,000,000 23,385,000,000 23,640,000,000 23,459,000,000 23,152,000,000 22,884,000,000 22,676,000,000 21,876,000,000 21,588,000,000 21,166,000,000 21,042,000,000 22,385,000,000 22,276,000,000 23,329,000,000 23,391,000,000 23,329,000,000 23,515,000,000 23,631,000,000 23,915,000,000 23,688,000,000 23,790,000,000 23,594,000,000 23,190,000,000 23,071,000,000              
        taxes accrued
       215,000,000 155,000,000   206,000,000    209,000,000    216,000,000   231,000,000 178,000,000 128,000,000  199,000,000 142,000,000   164,000,000  81,000,000 53,000,000 154,000,000 139,000,000 91,000,000 52,000,000 159,000,000 122,000,000 77,000,000 46,000,000 159,000,000 124,000,000 77,000,000 43,000,000 160,000,000 126,000,000 79,000,000 46,000,000 161,000,000 132,000,000 89,000,000 55,000,000 159,000,000 123,000,000 134,000,000 139,000,000 134,000,000 63,000,000 153,000,000 129,000,000 94,000,000 54,000,000 135,000,000 131,000,000 83,000,000 54,000,000 128,000,000 111,000,000 88,000,000 84 136,000,000 120,000,000 137,000,000 58,000,000 249,000,000 97,000,000 136,000,000 26,000,000 
        current regulatory liabilities
       142,000,000            179,000,000 241,000,000 219,000,000 138,000,000 238,000,000 225,000,000 121,000,000 96,000,000 147,000,000 189,000,000 164,000,000 121,000,000 156,000,000 161,000,000 149,000,000 114,000,000 133,000,000 130,000,000 128,000,000 119,000,000 141,000,000 144,000,000 110,000,000 87,000,000 99,000,000 87,000,000 80,000,000 89,000,000 120,000,000 107,000,000 106,000,000 132,000,000 218,000,000 248,000,000 216,000,000 149,000,000 180,000,000 140,000,000 160,000,000 140,000,000 99,000,000  97,000,000 87,000,000                  
        accumulated deferred income taxes and tax credits
       5,081,000,000 4,881,000,000 4,782,000,000  4,477,000,000 4,325,000,000 4,251,000,000  4,068,000,000 3,913,000,000 3,856,000,000  3,785,000,000 3,614,000,000 3,550,000,000 3,465,000,000 3,309,000,000 3,253,000,000                                                        
        investments in industrial development revenue bonds
                  240,000,000                                                              
        current collateral assets
              14,000,000 13,000,000 20,000,000 29,000,000 142,000,000 145,000,000 222,000,000 110,000,000                                                           
        accumulated deferred income taxes and investment tax credits
              4,176,000,000    3,804,000,000       3,211,000,000 3,151,000,000 3,034,000,000 2,948,000,000 2,919,000,000 2,902,000,000 2,758,000,000                                                 
        investment in industrial development revenue bonds
                                                                                
        accumulated other comprehensive income
                  -1,000,000 14,000,000 14,000,000 14,000,000                            -9,000,000 6,000,000 6,000,000 3,000,000 3,000,000            -13,000,000 6,000,000  51,000,000 -66,000,000 -19,000,000 36 41,000,000 42,000,000 23,000,000 62,000,000     
        mark-to-market derivative assets
                    157,000,000 137,000,000                                   137,000,000 159,000,000 137,000,000 129,000,000 153,000,000 166,000,000 233,000,000 121,000,000 239,000,000 277,000,000 324,000,000 207,000,000  273,000,000           
        restricted cash
                       131,000,000 134,000,000                                                        
        ameren corporation shareholders’ equity:
                                                                                
        total ameren corporation shareholders’ equity
                       9,353,000,000 9,148,000,000 8,938,000,000 8,489,000,000 8,227,000,000 8,085,000,000 8,059,000,000 8,062,000,000 7,791,000,000 7,705,000,000 7,631,000,000 7,656,000,000 7,386,000,000 7,230,000,000 7,184,000,000 7,345,000,000 7,158,000,000 7,064,000,000 7,103,000,000 7,193,000,000 6,922,000,000 6,869,000,000 6,946,000,000                                   
        accumulated deferred income taxes
                                2,666,000,000 2,623,000,000 2,692,000,000 2,584,000,000 2,564,000,000 2,506,000,000 4,721,000,000 4,444,000,000 4,321,000,000 4,264,000,000 4,255,000,000 4,028,000,000 3,928,000,000 3,885,000,000 4,084,000,000 3,931,000,000 3,964,000,000 3,923,000,000 3,845,000,000 3,526,000,000 3,340,000,000 3,166,000,000 3,422,000,000 3,348,000,000 2,938,000,000 3,121,000,000 2,938,000,000 2,886,000,000 2,941,000,000 2,725,000,000 2,604,000,000 2,554,000,000 2,431,000,000 2,194,000,000 2,159,000,000 2,131,000,000 2,072,000,000 2,104,000,000 1,989,000,000 2,046 2,055,000,000 2,039,000,000 2,000,000,000 2,144,000,000 2,013,000,000 1,958,000,000 1,935,000,000 1,886,000,000 
        accumulated deferred investment tax credits
                                42,000,000 43,000,000 45,000,000 46,000,000 47,000,000 49,000,000 50,000,000 52,000,000 53,000,000 55,000,000 56,000,000 57,000,000 59,000,000 60,000,000 62,000,000 64,000,000 65,000,000 64,000,000 59,000,000 60,000,000 62,000,000 63,000,000 65,000,000 67,000,000 88,000,000 87,000,000 88,000,000 90,000,000 90,000,000 90,000,000 92,000,000 94,000,000 93,000,000 95,000,000 97,000,000 100,000,000 102,000,000 104,000,000 106,000,000 109 111,000,000 113,000,000 116,000,000 118,000,000 121,000,000 123,000,000 134,000,000 139,000,000 
        miscellaneous accounts and notes receivable
                                     70,000,000    63,000,000   56,000,000 98,000,000 113,000,000 112,000,000 100,000,000 81,000,000 117,000,000 213,000,000 201,000,000 196,000,000 109,000,000 75,000,000 291,000,000 249,000,000 291,000,000 231,000,000 395,000,000 208,000,000 319,000,000 308,000,000 182,000,000 337,000,000 318,000,000 292,000,000 291,000,000 376,000,000 315,000,000 280 258,000,000 222,000,000 177,000,000 160,000,000 116,000,000 71,000,000 17,000,000 38,000,000 
        assets of discontinued operations
                                         15,000,000 15,000,000 14,000,000 14,000,000 14,000,000 17,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 165,000,000 1,395,000,000                          
        liabilities of discontinued operations
                                         26,000,000 27,000,000 27,000,000 28,000,000 29,000,000 30,000,000 32,000,000 34,000,000 33,000,000 33,000,000 33,000,000 33,000,000 45,000,000 1,141,000,000                          
        materials and supplies
                                          551,000,000 515,000,000 483,000,000 538,000,000 548,000,000 500,000,000 449,000,000 524,000,000 561,000,000 491,000,000 424,000,000 526,000,000 581,000,000 511,000,000 572,000,000 654,000,000 572,000,000 707,000,000 746,000,000 676,000,000 635,000,000 782,000,000 857,000,000 733,000,000 657,000,000 842,000,000 956,000,000 719,000,000 556,000,000 735 757,000,000 612,000,000 489,000,000 647,000,000 710,000,000 549,000,000 649,000,000 623,000,000 
        property and plant
                                          19,647,000,000 19,324,000,000 19,000,000,000 18,799,000,000 18,307,000,000 17,986,000,000 17,700,000,000 17,424,000,000 16,991,000,000 16,726,000,000 16,425,000,000 16,205,000,000 15,834,000,000 15,601,000,000 17,888,000,000 17,945,000,000 17,888,000,000 17,853,000,000 17,655,000,000 17,747,000,000 17,671,000,000 17,610,000,000 17,272,000,000 17,006,000,000 16,781,000,000 16,567,000,000 15,977,000,000 15,566,000,000 15,294,000,000 15,069 14,729,000,000 14,538,000,000 14,353,000,000 14,286,000,000 14,028,000,000 13,920,000,000 13,397,000,000 13,297,000,000 
        current accumulated deferred income taxes
                                              225,000,000 286,000,000 331,000,000 352,000,000 301,000,000 177,000,000 95,000,000 106,000,000 43,000,000 157,000,000     107,000,000  93,000,000                  
        ameren corporation stockholders’ equity:
                                                                                
        total ameren corporation stockholders’ equity
                                              7,014,000,000 6,764,000,000 6,704,000,000 6,713,000,000 6,774,000,000 6,572,000,000 6,513,000,000 6,544,000,000 6,574,000,000 6,374,000,000 7,725,000,000 7,788,000,000 7,725,000,000 7,730,000,000 7,754,000,000 7,991,000,000 7,901,000,000 7,853,000,000 7,840,000,000 7,147,000,000 7,061,000,000              
        intangible assets
                                                  20,000,000 19,000,000 17,000,000 22,000,000 19,000,000 18,000,000 7,000,000 4,000,000 7,000,000 7,000,000 9,000,000 113,000,000 124,000,000 129,000,000 138,000,000 150,000,000 160,000,000 167,000,000 167,000,000 177,000,000 189,000,000 198 197,000,000 206,000,000 210,000,000 217,000,000 228,000,000 250,000,000   
        mark-to-market derivative liabilities
                                                     52,000,000 65,000,000 75,000,000 126,000,000 135,000,000 126,000,000 161,000,000 188,000,000 196,000,000 254,000,000 109,000,000 197,000,000 234,000,000 273,000,000 155,000,000  236,000,000           
        current assets of discontinued operations
                                                       1,486,000,000                         
        current liabilities of discontinued operations
                                                       1,183,000,000                         
        credit facility borrowings
                                                        270,000,000 200,000,000 270,000,000 460,000,000 400,000,000 690,000,000 630,000,000 830,000,000                 
        ameren corporation stockholders' equity:
                                                                                
        common stock, 0.01 par value...
                                                                2,000,000                
        current portion of regulatory assets
                                                                  159,000,000              
        liabilities and stockholders’ equity
                                                                                
        preferred stock of subsidiary subject to mandatory redemption
                                                                     16,000,000 16,000,000 16 16,000,000 18,000,000 18,000,000 18,000,000 18,000,000 19,000,000 20,000,000 20,000,000 
        preferred stock of subsidiaries not subject to mandatory redemption
                                                                   195,000,000 195,000,000 195,000,000 195,000,000 195 195,000,000 195,000,000 195,000,000 195,000,000 195,000,000 195,000,000 195,000,000 195,000,000 
        minority interest in consolidated subsidiaries
                                                                   21,000,000 24,000,000 24,000,000 23,000,000 22 20,000,000 19,000,000 18,000,000 16,000,000 19,000,000 15,000,000 15,000,000 14,000,000 
        stockholders’ equity:
                                                                                
        total stockholders’ equity
                                                                   6,963,000,000 7,043,000,000 6,817,000,000 6,754,000,000 6,752 6,756,000,000 6,618,000,000 6,557,000,000 6,583,000,000 6,548,000,000 6,349,000,000 6,264,000,000 5,800,000,000 
        total liabilities and stockholders’ equity
                                                                   22,657,000,000    20,728    19,578,000,000     
        accounts receivable – trade (less allowance for doubtful
                                                                                
        accounts of 24 and 22, respectively)
                                                                    506,000,000            
        liabilities and stockholders' equity
                                                                                
        accrued pension and other postretirement benefits
                                                                    741,000,000 758,000,000 856,000,000 839 1,058,000,000 1,040,000,000 1,086,000,000 1,065,000,000 840,000,000 800,000,000 810,000,000 756,000,000 
        stockholders' equity:
                                                                                
        shares outstanding of 210.9 and 208.3, respectively
                                                                    2,000,000            
        total liabilities and stockholders' equity
                                                                    21,479,000,000 21,645,000,000 20,758,000,000  20,405,000,000 20,531,000,000 19,626,000,000  18,830,000,000 18,450,000,000 17,491,000,000 17,434,000,000 
        accounts of 26 and 22, respectively)
                                                                     529,000,000           
        shares outstanding of 210.1 and 208.3, respectively
                                                                     2,000,000           
        accounts of 38 and 22, respectively)
                                                                      656,000,000          
        shares outstanding of 209.4 and 208.3, respectively
                                                                      2,000,000          
        accounts of 26 and 11, respectively)
                                                                        691,000,000        
        shares outstanding of 208.0 and 206.6, respectively
                                                                        2,000,000        
        accounts of 31 and 11, respectively)
                                                                         562,000,000       
        investments in leveraged leases
                                                                         13,000,000 13,000,000 13,000,000 31,000,000 32,000,000 135,000,000 140,000,000 
        shares outstanding of 207.0 and 206.6, respectively
                                                                         2,000,000 2,000,000      
        accounts receivables – trade (less allowance for doubtful
                                                                                
        accounts of 25 and 11, respectively)
                                                                          687,000,000      
        accounts receivables – trade
                                                                           418,000,000     
        other
                                                                            -3,000,000 -6,000,000 -14,000,000 -10,000,000 
        accounts of 13 and 22, respectively)
                                                                            463,000,000    
        206.2 and 204.7 shares outstanding, respectively
                                                                            2,000,000    
        accounts of 25 and 22, respectively)
                                                                             409,000,000   
        205.8 and 204.7 shares outstanding, respectively
                                                                             2,000,000   
        accounts of 18 and 14, respectively)
                                                                              424,000,000  
        investments and other noncurrent assets:
                                                                                
        goodwill and other intangibles
                                                                              934,000,000 940,000,000 
        total investments and other noncurrent assets
                                                                              1,718,000,000 1,726,000,000 
        deferred credits and other noncurrent liabilities:
                                                                                
        total deferred credits and other noncurrent liabilities
                                                                              4,688,000,000 4,577,000,000 
        shares outstanding of 203.8 and 195.2, respectively
                                                                              2,000,000  
        accounts receivables - trade (less allowance for doubtful
                                                                                
        accounts of 14 and 13, respectively)
                                                                               442,000,000 
        shares outstanding of 195.2 and 162.9, respectively
                                                                               2,000,000 
        the accompanying notes are an integral part of these consolidated financial statements.
                                                                                
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-12-31 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 2021-09-30 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 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2005-06-30 2005-03-31 
                                                                               
          cash flows from operating activities:
                                                                               
          net income
        253,000,000 641,000,000 277,000,000 290,000,000 208,000,000 457,000,000 260,000,000 262,000,000 159,000,000 494,000,000 239,000,000 265,000,000 164,000,000 453,000,000 209,000,000 253,000,000 426,000,000 208,000,000 235,000,000 116,000,000 369,000,000 244,000,000 148,000,000 95,000,000 366,000,000 180,000,000 193,000,000 69,000,000 359,000,000 240,000,000 153,000,000 -59,000,000 290,000,000 194,000,000 104,000,000 33,000,000 371,000,000 148,000,000 107,000,000 30,000,000 345,000,000 151,000,000 110,000,000 49,000,000 295,000,000 150,000,000 98,000,000 38,000,000 304,000,000 139,000,000 74,000,000 54,000,000 -164,000,000 155,000,000 106,000,000 82,000,000 229,000,000 168,000,000 145,000,000 57,000,000 204,000,000 206,000,000 138,000,000 -509,999,382 244,000,000 143,000,000 123,000,000 61,000,000 293,000,000 185,000,000 121,000,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                               
          depreciation and amortization
        413,000,000 406,000,000 398,000,000 395,000,000 382,000,000 382,000,000 381,000,000 379,000,000 369,000,000 360,000,000 353,000,000 350,000,000 422,000,000 351,000,000 341,000,000 324,000,000 307,000,000 301,000,000 295,000,000 283,000,000 270,000,000 269,000,000 263,000,000 257,000,000 251,000,000 249,000,000 245,000,000 239,000,000 236,000,000 233,000,000 230,000,000 223,000,000 220,000,000 216,000,000 217,000,000 210,000,000 206,000,000 209,000,000 210,000,000 195,000,000 195,000,000 192,000,000 195,000,000 184,000,000 177,000,000 173,000,000 176,000,000 166,000,000 166,000,000 195,000,000 196,000,000 195,000,000 201,000,000 197,000,000 190,000,000 191,000,000 193,000,000 188,000,000 176,000,000 156,000,000 185,000,000 184,000,000 180,000,000 -536,999,265 180,000,000 175,000,000 182,000,000 149,000,000 167,000,000 115,000,000 157,000,000 
          amortization of nuclear fuel
        17,000,000 19,000,000 20,000,000 22,000,000 21,000,000 20,000,000 18,000,000 12,000,000 20,000,000 17,000,000 19,000,000  18,000,000 6,000,000 22,000,000 17,000,000   23,000,000 22,000,000 23,000,000 23,000,000 23,000,000 10,000,000 23,000,000 24,000,000 23,000,000 24,000,000 24,000,000 5,000,000 23,000,000 24,000,000 24,000,000 25,000,000 25,000,000 14,000,000 24,000,000 26,000,000 24,000,000 24,000,000 23,000,000 11,000,000 23,000,000 23,000,000 24,000,000 25,000,000 17,000,000 17,000,000 17,000,000 18,000,000 17,000,000 6,000,000 13,000,000 13,000,000 15,000,000 13,000,000 12,000,000 6,000,000 11,000,000 9,000,000 11,000,000 -25,999,963 11,000,000 6,000,000 9,000,000 10,000,000 10,000,000 9,000,000 8,000,000 
          amortization of debt issuance costs and premium/discounts
        5,000,000 4,000,000 5,000,000 5,000,000 5,000,000 5,000,000 4,000,000 5,000,000 4,000,000 4,000,000 5,000,000 3,000,000 4,000,000 5,000,000 8,000,000 4,000,000 6,000,000 6,000,000 5,000,000 6,000,000 5,000,000 6,000,000 5,000,000 5,000,000 5,000,000 4,000,000 5,000,000 4,000,000 5,000,000 6,000,000 5,000,000 6,000,000 5,000,000 5,000,000 6,000,000 5,000,000 6,000,000 5,000,000 6,000,000 6,000,000 5,000,000 6,000,000 5,000,000 6,000,000 5,000,000 6,000,000 5,000,000 6,000,000 6,000,000 7,000,000 5,000,000 4,000,000 7,000,000 3,000,000 9,000,000 9,000,000 9,000,000 3,000,000 4,000,000 6,000,000 6,000,000 3,000,000 5,000,000 -13,999,981 4,000,000 5,000,000 5,000,000 3,000,000 5,000,000 4,000,000 3,000,000 
          deferred income taxes and production and investment tax credits
                                                                               
          allowance for equity funds used during construction
        -28,000,000 -21,000,000 -23,000,000 -16,000,000 -28,000,000 -23,000,000 -16,000,000 -9,000,000 -15,000,000 -16,000,000 -14,000,000 -9,000,000 -12,000,000 -12,000,000 -11,000,000 -8,000,000 -14,000,000 -9,000,000 -7,000,000 -7,000,000 -12,000,000 -9,000,000 -4,000,000 -8,000,000 -7,000,000 -7,000,000 -6,000,000 -11,000,000 -11,000,000 -9,000,000 -5,000,000 -8,000,000 -6,000,000 -4,000,000 -6,000,000 -7,000,000 -7,000,000 -5,000,000 -8,000,000 -11,000,000 -8,000,000 -6,000,000 -5,000,000 -8,000,000 -10,000,000 -9,000,000 -7,000,000 -11,000,000 -10,000,000                       
          stock-based compensation costs
        7,000,000 7,000,000 7,000,000 7,000,000 6,000,000 8,000,000 6,000,000 8,000,000 5,000,000 7,000,000 6,000,000 8,000,000 6,000,000 6,000,000 8,000,000 4,000,000 6,000,000 5,000,000 6,000,000 5,000,000 5,000,000 5,000,000 6,000,000 5,000,000 5,000,000 4,000,000 6,000,000 5,000,000 5,000,000 4,000,000 6,000,000         4,000,000 6,000,000 6,000,000 8,000,000 5,000,000 5,000,000 6,000,000 9,000,000 8,000,000 5,000,000                       
          other
        34,000,000 19,000,000 3,000,000 7,000,000 3,000,000 71,000,000 -3,000,000 16,000,000 4,000,000 31,000,000 -13,000,000 -6,000,000 5,000,000 30,000,000 22,000,000 11,000,000 9,000,000 -6,000,000 8,000,000 8,000,000 9,000,000 -12,000,000 17,000,000 -3,000,000 -6,000,000 3,000,000 -8,000,000 23,000,000 10,000,000 9,000,000 2,000,000 -3,000,000 -2,000,000 -1,000,000 -4,000,000 13,000,000 -2,000,000 -4,000,000 -3,000,000 -2,000,000 5,000,000 -2,000,000 -11,000,000 -15,000,000 -1,000,000 -7,000,000 -1,000,000 9,000,000 -4,000,000   63,000,000 5,000,000   -21,000,000 -7,000,000   5,000,000 -6,000,000 5,000,000 -1,000,000 -9,999,988 3,000,000 1,000,000 6,000,000 -4,000,000 16,000,000 71,000,000 23,000,000 
          changes in assets and liabilities:
                                                                               
          receivables
        84,000,000 -167,000,000 -121,000,000 -68,000,000 92,000,000 -98,000,000 -137,000,000 52,000,000 90,000,000 -119,000,000 61,000,000 112,000,000 -21,000,000 -109,000,000 -70,000,000 -117,000,000 -120,000,000 -87,000,000 -5,000,000 66,000,000 48,000,000 -156,000,000 -5,000,000 69,000,000 56,000,000 -50,000,000 4,000,000 105,000,000 41,000,000 -144,000,000 -26,000,000 6,000,000 -5,000,000 -98,000,000 44,000,000 63,000,000 -23,000,000 -166,000,000 55,000,000 154,000,000 9,000,000 -32,000,000 -48,000,000 15,000,000 78,000,000 24,000,000 -86,000,000 28,000,000 4,000,000 -72,000,000 17,000,000 67,000,000 -116,000,000 -73,000,000 37,000,000 -218,000,000 146,000,000 -26,000,000 119,000,000 -119,000,000 129,000,000 93,000,000 -78,000,000 319,999,680 -125,000,000   -66,000,000 -11,000,000  20,000,000 
          inventories
        29,000,000 -65,000,000 -69,000,000 93,000,000 29,000,000 -53,000,000 -61,000,000 54,000,000 26,000,000 -49,000,000 -81,000,000 37,000,000 26,000,000 -95,000,000 -80,000,000 72,000,000 -68,000,000 -59,000,000 54,000,000 36,000,000 -42,000,000 -42,000,000 23,000,000 -6,000,000 -54,000,000 -31,000,000 81,000,000 43,000,000 -50,000,000 -22,000,000 68,000,000 37,000,000 -34,000,000 -46,000,000 60,000,000                                     
          accounts and wages payable
        286,000,000 -71,000,000 118,000,000 -291,000,000 243,000,000 -29,000,000 74,000,000 -284,000,000 183,000,000 48,000,000 27,000,000 -362,000,000 264,000,000 -41,000,000 148,000,000 -235,000,000 65,000,000 44,000,000 -252,000,000 230,000,000 3,000,000 28,000,000 -221,000,000 202,000,000 -6,000,000 14,000,000 -213,000,000 176,000,000 11,000,000 40,000,000 -249,000,000 215,000,000 48,000,000 -231,000,000 215,000,000 4,000,000 46,000,000 -246,000,000 170,000,000 8,000,000 35,000,000 -215,000,000 197,000,000 -7,000,000 3,000,000 -183,000,000 183,000,000 -27,000,000 88,000,000 -221,000,000 197,000,000 -45,000,000 52,000,000 -177,000,000 199,000,000 -37,000,000 41,000,000 -245,000,000 157,000,000 -36,000,000 42,000,000 -106,000,000 113,000,020 -51,000,000   204,000,000    
          taxes accrued
        -117,000,000 29,000,000 286,000,000 -8,000,000 -142,000,000 55,000,000 51,000,000 70,000,000 -160,000,000 63,000,000 43,000,000 50,000,000 -160,000,000 53,000,000 47,000,000 47,000,000 44,000,000 44,000,000 60,000,000 -120,000,000 46,000,000 61,000,000 47,000,000 -126,000,000 41,000,000 49,000,000 28,000,000 -102,000,000 -13,000,000 56,000,000 49,000,000 -83,000,000 55,000,000 47,000,000 36,000,000 -106,000,000 39,000,000 50,000,000 30,000,000 -138,000,000 33,000,000 48,000,000 33,000,000 -144,000,000 32,000,000 50,000,000 18,000,000 -299,000,000 37,000,000 5,000,000 71,000,000 -90,000,000 24,000,000 35,000,000 40,000,000  4,000,000 48,000,000 29,000,000 -74,000,000 102,000,000 -62,000,000 4,000,000 -74,999,979 16,000,000 -18,000,000 77,000,000 -220,000,000  25,000,000 87,000,000 
          regulatory assets and liabilities
        -32,000,000 250,000,000 -83,000,000 -70,000,000 13,000,000 191,000,000 -10,000,000 -95,000,000 -180,000,000 96,000,000 -41,000,000 -40,000,000 -55,000,000 57,000,000 -149,000,000 75,000,000 101,000,000 -20,000,000 -421,000,000 -199,000,000 32,000,000 -73,000,000 -14,000,000 17,000,000 143,000,000 -22,000,000 26,000,000 -12,000,000 130,000,000 63,000,000 20,000,000 -53,000,000 93,000,000 -11,000,000 7,000,000 69,000,000 38,000,000 27,000,000 81,000,000 20,000,000 9,000,000 3,000,000 62,000,000                             
          assets, other
        -7,000,000 37,000,000   19,000,000 -62,000,000 9,000,000 -31,000,000 -40,000,000 -24,000,000 -14,000,000 13,000,000 -52,000,000 19,000,000 -54,000,000 -52,000,000 -57,000,000 -9,000,000 -17,000,000 -57,000,000 -6,000,000 -3,000,000 -3,000,000 -45,000,000 3,000,000 -14,000,000 4,000,000 -10,000,000 7,000,000 1,000,000 6,000,000 -8,000,000 15,000,000 7,000,000 -33,000,000 -15,000,000 20,000,000 4,000,000 33,000,000 -5,000,000 11,000,000 14,000,000 153,000,000 -55,000,000 22,000,000 -90,000,000 -18,000,000 -29,000,000 21,000,000 39,000,000 2,000,000 -12,000,000 -67,000,000 -32,000,000 30,000,000 -149,000,000 8,000,000 45,000,000 17,000,000 14,000,000 57,000,000 -25,000,000 20,000,025 49,000,000 -93,000,000 24,000,000 -6,000,000 -155,000,000   
          liabilities, other
        32,000,000 -29,000,000 111,000,000 -10,000,000 33,000,000 -111,000,000 89,000,000 11,000,000 64,000,000 17,000,000 40,000,000 -6,000,000 33,000,000 -26,000,000 71,000,000 -26,000,000 -44,000,000 51,000,000 -34,000,000 -35,000,000 -85,000,000 27,000,000 -18,000,000 -44,000,000 -52,000,000 74,000,000 -11,000,000 -72,000,000 5,000,000 7,000,000 -57,000,000 -19,000,000 -9,000,000 18,000,000 3,000,000 19,000,000 -17,000,000 13,000,000 -25,000,000 -15,000,000 -14,000,000 6,000,000 -33,000,000 42,000,000 -73,000,000 -46,000,000 49,000,000 57,000,000 -33,000,000  80,000,000 -19,000,000 87,000,000 -8,000,000 11,000,000 -31,000,000 66,000,000 -60,000,000 128,000,000 41,000,000 77,000,000 81,000,000 -16,000,000 -192,999,992 126,000,000 31,000,000 36,000,000 37,000,000 91,000,000 -45,000,000 46,000,000 
          pension and other postretirement benefits
        -38,000,000 -38,000,000 -37,000,000 -39,000,000 -48,000,000 -56,000,000 -56,000,000 -56,000,000 -101,000,000 -68,000,000 -56,000,000 -58,000,000 -16,000,000 -17,000,000 -17,000,000 -15,000,000 -7,000,000 -3,000,000 4,000,000 3,000,000 -36,000,000   -4,000,000 -21,000,000 -10,000,000 -4,000,000 -23,000,000 -6,000,000 -7,000,000 11,000,000 10,000,000 -37,000,000 -3,000,000 9,000,000 10,000,000 -30,000,000 -5,000,000 9,000,000 -38,000,000 1,000,000 1,000,000 27,000,000 17,000,000 -48,000,000 -9,000,000 30,000,000 6,000,000 -70,000,000 3,000,000 28,000,000  -45,000,000 3,000,000 30,000,000  7,000,000 -13,000,000 36,000,000             
          counterparty collateral
            -2,000,000 8,000,000 -15,000,000 8,000,000 3,000,000 10,000,000 22,000,000 112,000,000 4,000,000 35,000,000                         3,000,000   4,000,000 -2,000,000 2,000,000 5,000,000 5,000,000 10,000,000 7,000,000 -1,000,000 -47,000,000 70,000,000 -49,000,000 45,000,000 -46,000,000 -23,000,000 -83,000,000   -53,000,000             
          net cash from operating activities
        956,000,000 1,104,000,000 862,000,000 431,000,000 817,000,000 897,000,000 557,000,000 492,000,000 533,000,000 920,000,000 615,000,000 496,000,000 664,000,000 727,000,000 484,000,000 388,000,000 756,000,000 471,000,000 -35,000,000 398,000,000 635,000,000 404,000,000 290,000,000 502,000,000 789,000,000 492,000,000 387,000,000 484,000,000 866,000,000 562,000,000 258,000,000 461,000,000 780,000,000 532,000,000 331,000,000 564,000,000 796,000,000 414,000,000 349,000,000 489,000,000 761,000,000 469,000,000 298,000,000 348,000,000 549,000,000 415,000,000 239,000,000 379,000,000 546,000,000 349,000,000 554,000,000 338,000,000 732,000,000 391,000,000 381,000,000 231,000,000 838,000,000 371,000,000 537,000,000 288,000,000 750,000,000 169,000,000 326,000,000 -919,998,898 377,000,000 185,000,000 358,000,000 249,000,000 460,000,000 304,000,000 357,000,000 
          cash flows from investing activities:
                                                                               
          capital expenditures
        -1,010,000,000 -988,000,000 -1,066,000,000 -1,064,000,000 -1,290,000,000 -1,137,000,000 -1,002,000,000 -890,000,000 -1,026,000,000 -749,000,000 -891,000,000 -931,000,000 -914,000,000 -899,000,000 -764,000,000 -774,000,000 -752,000,000 -652,000,000 -694,000,000 -785,000,000 -656,000,000 -592,000,000 -636,000,000 -650,000,000 -636,000,000 -581,000,000 -544,000,000 -597,000,000 -577,000,000 -533,000,000 -579,000,000 -609,000,000 -525,000,000 -494,000,000 -504,000,000 -580,000,000 -496,000,000 -504,000,000 -496,000,000 -585,000,000 -486,000,000 -429,000,000 -417,000,000 -475,000,000 -427,000,000 -441,000,000 -442,000,000 -436,000,000 -368,000,000 -280,000,000 -227,000,000 -285,000,000 -206,000,000 -251,000,000 -289,000,000 -409,000,000 -449,000,000 -422,000,000 -424,000,000 -580,000,000 -518,000,000 -378,000,000 -420,000,000 1,034,998,619 -320,000,000 -326,000,000 
          free cash flows
        -54,000,000 116,000,000 -204,000,000 -633,000,000 -473,000,000 -240,000,000 -445,000,000 -398,000,000 -493,000,000 171,000,000 -276,000,000 -435,000,000 -250,000,000 -172,000,000 -280,000,000 -386,000,000 4,000,000 -181,000,000 -729,000,000 -387,000,000 -21,000,000 -188,000,000 -346,000,000 -148,000,000 153,000,000 -89,000,000 -157,000,000 -113,000,000 289,000,000 29,000,000 -321,000,000 -148,000,000 255,000,000 38,000,000 -173,000,000 -16,000,000 300,000,000 -90,000,000 -147,000,000 -96,000,000 275,000,000 40,000,000 -119,000,000 -127,000,000 122,000,000 -26,000,000 -203,000,000 -57,000,000 178,000,000 69,000,000 327,000,000 53,000,000 526,000,000 140,000,000 92,000,000 -178,000,000 389,000,000 -51,000,000 113,000,000 -292,000,000 232,000,000 -209,000,000 -94,000,000 114,999,721 57,000,000 185,000,000 358,000,000 -77,000,000 460,000,000 304,000,000 357,000,000 
          nuclear fuel expenditures
        -26,000,000 -1,000,000 -1,000,000 -18,000,000 -34,000,000 -20,000,000 -25,000,000 -12,000,000 -111,000,000 -13,000,000 -30,000,000 -20,000,000 -7,000,000 -6,000,000 -16,000,000 -15,000,000 -3,000,000 -1,000,000 -5,000,000 -5,000,000 -21,000,000 -35,000,000 -5,000,000 -1,000,000 -4,000,000 -21,000,000 -22,000,000 -14,000,000 -4,000,000 -12,000,000 -11,000,000 -2,000,000 -23,000,000 -27,000,000 -14,000,000 -17,000,000 -3,000,000 -21,000,000 -22,000,000 -2,000,000 -11,000,000 -17,000,000 -46,000,000 -2,000,000 -16,000,000 -10,000,000 -11,000,000 -9,000,000 -15,000,000 -18,000,000 -55,000,000 -6,000,000 -6,000,000 -23,000,000 -33,000,000 -12,000,000   -12,000,000 -38,000,000 -21,000,000 -102,000,000 38,999,932 -15,000,000   -2,000,000    
          purchases of securities – nuclear decommissioning trust fund
        -67,000,000 -129,000,000 -137,000,000 -107,000,000 -85,000,000 -176,000,000 -253,000,000 -70,000,000 -110,000,000 -75,000,000 -52,000,000 -29,000,000 -53,000,000 -54,000,000 -25,000,000 -97,000,000 -208,000,000 -51,000,000 -152,000,000 -55,000,000 -16,000,000 -57,000,000 -96,000,000 -64,000,000 -96,000,000 -57,000,000 -39,000,000 -143,000,000 -43,000,000 -91,000,000 -38,000,000 -165,000,000 -35,000,000 -149,000,000 -64,000,000 -82,000,000 -109,000,000 -71,000,000 -130,000,000 -62,000,000 -184,000,000 -33,000,000 -84,000,000 -40,000,000 -75,000,000 -104,000,000 -186,000,000 -67,000,000 -50,000,000 -34,000,000 -91,000,000 -64,000,000 -89,000,000 -58,000,000 -60,000,000 -68,000,000 -27,000,000 -85,000,000 -203,000,000 -134,000,000 -139,000,000 -158,000,000 -89,000,000 109,999,858 -35,000,000       
          sales and maturities of securities – nuclear decommissioning trust fund
        68,000,000 125,000,000 130,000,000 93,000,000 84,000,000 171,000,000 243,000,000 66,000,000 104,000,000 71,000,000 48,000,000 17,000,000 53,000,000 49,000,000 22,000,000 92,000,000 196,000,000 58,000,000 150,000,000 48,000,000 14,000,000 40,000,000 81,000,000 76,000,000 89,000,000 59,000,000 36,000,000 140,000,000 37,000,000 88,000,000 34,000,000 161,000,000 31,000,000 146,000,000 58,000,000 80,000,000 105,000,000 67,000,000 125,000,000 59,000,000 180,000,000 31,000,000 79,000,000 37,000,000 71,000,000 101,000,000 182,000,000 62,000,000 45,000,000                       
          net cash from investing activities
        -1,033,000,000 -1,001,000,000 -1,024,000,000 -1,087,000,000 -1,350,000,000 -1,174,000,000 -1,026,000,000 -906,000,000 -1,142,000,000 -767,000,000 -925,000,000 -964,000,000 -912,000,000 -906,000,000 -772,000,000 -780,000,000 -886,000,000 -871,000,000 -889,000,000 -1,348,000,000 -666,000,000 -631,000,000 -684,000,000 -637,000,000 -644,000,000 -587,000,000 -567,000,000 -617,000,000 -590,000,000 -532,000,000 -597,000,000 -620,000,000 -526,000,000 -520,000,000 -539,000,000 -590,000,000 -516,000,000 -525,000,000 -510,000,000 -614,000,000 -487,000,000 -436,000,000 -439,000,000 -505,000,000 -442,000,000 -457,000,000 -313,000,000 -690,000,000 -396,000,000 -248,000,000 -250,000,000 -336,000,000 -216,000,000 -243,000,000 -317,000,000 -444,000,000 -463,000,000 -450,000,000 -432,000,000 -596,000,000 -566,000,000 -408,000,000 -527,000,000 1,092,998,532 -339,000,000   -261,000,000    
          cash flows from financing activities:
                                                                               
          dividends on common stock
        -192,000,000 -192,000,000 -193,000,000 -191,000,000 -179,000,000 -179,000,000 -178,000,000 -178,000,000 -166,000,000 -166,000,000 -165,000,000 -165,000,000 -153,000,000 -152,000,000 -153,000,000 -152,000,000 -141,000,000 -142,000,000 -140,000,000 -127,000,000 -123,000,000 -122,000,000 -122,000,000 -122,000,000 -117,000,000 -117,000,000 -116,000,000 -117,000,000 -111,000,000 -112,000,000 -111,000,000 -111,000,000 -106,000,000 -107,000,000 -107,000,000 -107,000,000 -103,000,000 -103,000,000 -103,000,000 -104,000,000 -99,000,000 -100,000,000 -99,000,000 -99,000,000 -97,000,000 -97,000,000 -97,000,000 -97,000,000 -97,000,000 -93,000,000 -93,000,000 -92,000,000 -93,000,000 -92,000,000 -91,000,000 -91,000,000 -83,000,000 -82,000,000 -82,000,000 -135,000,000 -133,000,000 -133,000,000 -133,000,000 394,999,473 -132,000,000   -131,000,000    
          dividends paid to noncontrolling interest holders
        -1,000,000 -1,000,000 -2,000,000 -1,000,000 -1,000,000 -1,000,000 -2,000,000 -1,000,000 -1,000,000 -1,000,000 -2,000,000 -1,000,000 -1,000,000 -1,000,000 -2,000,000 -1,000,000 -1,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000 -1,000,000 -2,000,000       -2,000,000 -3,000,000               
          short-term debt
        -260,000,000 -237,000,000 -110,000,000 108,000,000 -395,000,000 846,000,000 -176,000,000 332,000,000 -805,000,000 12,000,000 81,000,000 179,000,000 -153,000,000 200,000,000 -80,000,000 555,000,000 122,000,000 -458,000,000 399,000,000 218,000,000 152,000,000 -495,000,000 175,000,000 -104,000,000 -454,000,000 199,000,000 202,000,000 76,000,000 15,000,000 -454,000,000 475,000,000 38,000,000 -446,000,000 -22,000,000 356,000,000 -50,000,000 -170,000,000 197,000,000 280,000,000 -482,000,000 -103,000,000 -69,000,000 241,000,000 -39,000,000 -40,000,000 93,000,000 332,000,000          -530,000,000 -32,000,000 -177,000,000 -233,000,000 -43,000,000 -167,000,000 145,000,000 -589,999,140 -417,000,000 666,000,000 341,000,000 301,000,000 -86,000,000  4,000,000 
          maturities and extinguishment of long-term debt
        -17,000,000                                                                      
          issuances of long-term debt
        361,000,000 500,000,000 1,099,000,000 925,000,000 140,000,000 1,123,000,000 347,000,000 1,298,000,000 498,000,000 499,000,000 349,000,000 594,000,000   973,000,000 450,000,000 920,000,000 798,000,000 465,000,000 627,000,000 450,000,000 450,000,000 499,000,000   496,000,000 300,000,000   240,000,000   948,000,000   300,000,000                           
          issuances of common stock
        539,000,000 10,000,000 12,000,000 13,000,000 243,000,000 9,000,000 11,000,000 10,000,000 318,000,000 12,000,000 11,000,000 5,000,000 304,000,000 12,000,000 12,000,000 5,000,000 39,000,000 133,000,000 125,000,000 439,000,000 10,000,000 14,000,000 13,000,000 14,000,000 17,000,000 18,000,000 19,000,000 18,000,000 16,000,000 23,000,000 17,000,000                   15,000,000 17,000,000                21,000,000     
          employee payroll taxes related to stock-based compensation
        -13,000,000 -8,000,000 -20,000,000 -16,000,000 -17,000,000 -20,000,000 -29,000,000 -19,000,000                                         
          debt issuance costs
        -7,000,000 -3,000,000 -3,000,000 -11,000,000 -12,000,000 -1,000,000 -13,000,000 -5,000,000 -9,000,000 -3,000,000 -4,000,000 -5,000,000 -7,000,000 -5,000,000   -2,000,000 -10,000,000 -3,000,000 -9,000,000 -1,000,000 -7,000,000 -3,000,000 -7,000,000 -6,000,000 -4,000,000 -5,000,000   -6,000,000                                        
          net cash from financing activities
        62,000,000 -62,000,000 180,000,000 704,000,000 537,000,000 300,000,000 415,000,000 497,000,000 635,000,000 -153,000,000 319,000,000 489,000,000 284,000,000 198,000,000 295,000,000 391,000,000 8,000,000 495,000,000 795,000,000 1,083,000,000 36,000,000 187,000,000 421,000,000 156,000,000 -112,000,000 99,000,000 191,000,000 148,000,000 -280,000,000 -23,000,000 360,000,000  -255,000,000 -10,000,000 207,000,000      -204,000,000 -37,000,000 142,000,000  -140,000,000 62,000,000 70,000,000 147,000,000 -131,000,000 -296,000,000 -276,000,000 -65,000,000 -414,000,000 -2,000,000 -326,000,000 272,000,000 -63,000,000 26,000,000 107,000,000 194,000,000 -183,000,000 258,000,000 32,000,000 -205,999,416 -555,000,000 709,000,000 52,000,000 115,000,000 -218,000,000   
          net change in cash, cash equivalents, and restricted cash
        -15,000,000 41,000,000 18,000,000 48,000,000 4,000,000 23,000,000 -54,000,000 83,000,000 26,000,000 9,000,000 21,000,000 36,000,000 19,000,000 7,000,000 -1,000,000 -122,000,000 95,000,000 -129,000,000 133,000,000 5,000,000 -40,000,000 27,000,000 21,000,000 33,000,000 4,000,000 11,000,000 15,000,000 -4,000,000 7,000,000 21,000,000                                         
          cash, cash equivalents, and restricted cash at beginning of year
        328,000,000 272,000,000 216,000,000 155,000,000 301,000,000 176,000,000 107,000,000 68,000,000                                         
          cash, cash equivalents, and restricted cash at end of year
                                                                               
          cash paid (refunded) during the year:
                                                                               
          interest
                                                                              41,000,000 
          income taxes
                                                                              4,000,000 
          deferred income taxes and tax credits
         83,000,000 56,000,000 116,000,000                                                                    
          cash, cash equivalents, and restricted cash at end of period
         41,000,000 18,000,000 376,000,000  23,000,000 -54,000,000 355,000,000  9,000,000 237,000,000  19,000,000 7,000,000 154,000,000 -122,000,000 95,000,000 172,000,000  5,000,000 -40,000,000 203,000,000  33,000,000 4,000,000 118,000,000  -4,000,000 7,000,000 89,000,000                                         
          maturities of long-term debt
           -300,000,000  -499,000,000     -55,000,000       -357,000,000 -85,000,000 -251,000,000 -329,000,000 -319,000,000 -199,000,000                                         
          deferred income taxes and investment tax credits
             69,000,000 32,000,000 44,000,000 101,000,000 62,000,000 31,000,000 35,000,000 33,000,000 71,000,000 35,000,000 31,000,000 80,000,000 33,000,000 26,000,000 23,000,000 57,000,000 45,000,000 23,000,000 23,000,000 90,000,000 22,000,000 32,000,000 12,000,000 131,000,000 55,000,000 26,000,000 173,000,000 191,000,000 124,000,000 51,000,000 22,000,000 230,000,000 92,000,000 42,000,000 51,000,000 202,000,000 57,000,000 59,000,000 81,000,000 192,000,000 94,000,000 84,000,000 152,000,000 188,000,000 159,000,000 62,000,000 -107,000,000 234,000,000 105,000,000 70,000,000 101,000,000 224,000,000 45,000,000 32,000,000 37,000,000 23,000,000 84,000,000 23,000,000 -18,000,028 26,000,000   84,000,000    
          redemptions of ameren illinois preferred stock
                        -13,000,000                                                     
          wind generation expenditures
                        -98,000,000 -224,000,000 -193,000,000                                                     
          purchase of bonds
                               -110,000,000                                               
          proceeds from sale of remarketed bonds
                               110,000,000                                               
          cash paid during the year:
                                                                               
          repurchases of common stock for stock-based compensation
                                                                               
          noncash financing activity – issuance of common stock for stock-based compensation
                                 54,000,000 35,000,000                                         
          income from discontinued operations, net of tax
                                                                               
          benefit from callaway construction and operating license
                                                                               
          share-based compensation costs
                                       5,000,000 4,000,000 4,000,000 4,000,000 5,000,000 6,000,000 6,000,000                                 
          net cash from operating activities – continuing operations
                                           565,000,000 794,000,000 415,000,000 350,000,000 488,000,000 765,000,000 471,000,000 297,000,000 349,000,000 550,000,000 419,000,000 239,000,000                         
          net cash from operating activities – discontinued operations
                                             -1,000,000 -1,000,000  -4,000,000 -2,000,000 1,000,000  -1,000,000                           
          net cash from investing activities – continuing operations
                                           -590,000,000 -516,000,000 -511,000,000 -524,000,000 -589,000,000 -487,000,000 -436,000,000 -439,000,000 -505,000,000 -429,000,000 -457,000,000 -465,000,000                         
          net cash from investing activities – discontinued operations
                                              14,000,000     -13,000,000 152,000,000                         
          redemptions, repurchases, and maturities of long-term debt
                                                                               
          share-based payments
                                       -39,000,000                                     
          net cash from financing activities – continuing operations
                                           17,000,000 -275,000,000 111,000,000 -118,000,000 345,000,000 -204,000,000 -37,000,000 142,000,000 149,000,000 -140,000,000 62,000,000 70,000,000                         
          net change in cash and cash equivalents
                                         2,000,000 -1,000,000 -9,000,000 5,000,000 -279,000,000 220,000,000 70,000,000 -4,000,000 1,000,000 -8,000,000 -33,000,000 20,000,000 -4,000,000 -164,000,000 19,000,000 -195,000,000 28,000,000 -63,000,000 102,000,000 146,000,000 -262,000,000 59,000,000 312,000,000 -53,000,000 212,000,000 -114,000,000 1,000,000 19,000,000 -169,000,000 -32,999,782 -517,000,000 526,000,000 24,000,000 103,000,000    
          cash and cash equivalents at beginning of year
                                       9,000,000 292,000,000 5,000,000 30,000,000 25,000,000 545,000,000 622,000,000 92,000,000 355,000,000 -136,999,863 137,000,000 69,000,000 
          cash and cash equivalents at end of year
                                                                               
          cash and cash equivalents at end of period
                                        -1,000,000 2,000,000 8,000,000  5,000,000 13,000,000  70,000,000 -4,000,000 6,000,000  -33,000,000 20,000,000 26,000,000  44,000,000 -195,000,000 573,000,000  102,000,000 146,000,000 360,000,000  312,000,000 -53,000,000 304,000,000  1,000,000 19,000,000 186,000,000  -517,000,000 526,000,000 161,000,000  -17,000,000 -3,000,000 30,000,000 
          capital issuance costs
                                           -8,000,000   -10,000,000   -7,000,000          -1,000,000    -3,000,000   2,999,996      
          loss (income) from discontinued operations, net of tax
                                                                               
          proceeds from note receivable – marketing company
                                               8,000,000 2,000,000 5,000,000 5,000,000 16,000,000 9,000,000 14,000,000 56,000,000                         
          contributions to note receivable – marketing company
                                               -1,000,000 -2,000,000 -5,000,000 -5,000,000 -6,000,000 -13,000,000 -65,000,000                         
          income from discontinued operations, net of taxes
                                                     1,000,000 1,000,000  3,000,000                       
          provision for callaway construction and operating license
                                                                              
          materials and supplies
                                            -36,000,000 -32,000,000 55,000,000 9,000,000 -48,000,000 -50,000,000 75,000,000 37,000,000 -69,000,000 -67,000,000 102,000,000 53,000,000 -70,000,000 -80,000,000 135,000,000 39,000,000 -69,000,000 -40,000,000 148,000,000 78,000,000 -120,000,000 -76,000,000 185,000,000 116,000,000 -232,000,000 -163,000,000 179,000,000 109,999,912 -145,000,000 -123,000,000 158,000,000 61,000,000 -161,000,000  60,000,000 
          employee withholding taxes related to share-based payments
                                                                               
          (income) from discontinued operations, net of taxes
                                                                               
          employee payroll taxes related to share-based payments
                                             -32,000,000                                 
          maturity of long-term debt
                                              -260,000,000                                 
          net cash provided (used in) by operating activities – discontinued operations
                                                                               
          maturities, redemptions and repurchases of long-term debt
                                                                               
          loss from discontinued operations, net of taxes
                                                                              
          redemptions and maturities of long-term debt
                                                                             
          net cash from financing activities – discontinued operations
                                                                               
          redemptions of long-term debt
                                                      -163,000,000                         
          premiums paid on long-term debt repurchases
                                                                               
          less: cash and cash equivalents at end of year – discontinued operations
                                                                               
          cash and cash equivalents at end of year – continuing operations
                                                                               
          noncash financing activity – dividends on common stock
                                                                               
          less cash and cash equivalents at end of period – discontinued operations
                                                                               
          cash and cash equivalents at end of period – continuing operations
                                                    -33,000,000 20,000,000 26,000,000                         
          advances received for construction
                                                                               
          (income) income from discontinued operations, net of tax
                                                                               
          taum sauk regulatory disallowance
                                                                               
          tax grants received related to renewable energy properties
                                                                               
          short-term debt and credit facility repayments
                                                                               
          issuances:
                                                                               
          long-term debt
                                                           -204,000,000    -381,000,000 -1,022,000,000 423,000,000 349,000,000 -19,000,000 -2,158,000,000 1,354,000,000 -19,000,000 464,999,512 -890,000,000   -26,000,000 -370,000,000 85,000,000 
          common stock
                                                           20,000,000 17,000,000 23,000,000 20,000,000 17,000,000 570,000,000 19,000,000 28,000,000 47,000,000 32,000,000 29,000,000 46,000,000 -70,999,909 23,000,000   18,000,000 21,000,000 372,000,000 30,000,000 
          repayments of advances received for construction
                                                                               
          net cash from operating activities - continuing operations
                                                        486,000,000                       
          net cash from operating activities - discontinued operations
                                                        60,000,000                       
          net cash from investing activities - continuing operations
                                                        -385,000,000                       
          net cash from investing activities - discontinued operations
                                                        -11,000,000                       
          net cash from financing activities - continuing operations
                                                        -131,000,000                       
          net cash from financing activities - discontinued operations
                                                                               
          less cash and cash equivalents at end of period, discontinued operations
                                                                               
          cash and cash equivalents at end of period, continuing operations
                                                                               
          gain on sales of properties
                                                                               
          net mark-to-market gain on derivatives
                                                          -16,000,000 12,000,000   -31,000,000 3,000,000 30,000,000 -5,000,000 -51,000,000             
          taum sauk insurance recoveries, net of costs
                                                           -3,000,000                    
          sales of securities – nuclear decommissioning trust fund
                                                         26,000,000 87,000,000 61,000,000 85,000,000 54,000,000 56,000,000 65,000,000 24,000,000 91,000,000 200,000,000 137,000,000 129,000,000 145,000,000 86,000,000 -97,999,872 33,000,000 22,000,000 43,000,000     
          proceeds from sales of properties
                                                                               
          short-term and credit facility repayments
                                                                               
          generator advances for construction refunded, net of receipts
                                                         -73,000,000                     
          noncash investing activity – doe settlement
                                                                               
          short-term and credit facility borrowings
                                                          -125,000,000 204,000,000 -165,000,000 60,000,000 -220,000,000                 
          loss on goodwill and other impairments
                                                                               
          redemptions, repurchases, and maturities:
                                                                               
          preferred stock
                                                                     999,999       
          generator advances received for construction, net of repayments
                                                                               
          goodwill and other impairment losses
                                                                               
          purchases of emission allowances
                                                                   -10,000,000 -2,000,000 11,999,976 -3,000,000   -4,000,000    
          proceeds from sales of property interests
                                                                              
          generator advances for construction received (refunded)
                                                            2,000,000 10,000,000 -33,000,000                 
          taum sauk costs, net of insurance recoveries
                                                               -3,000,000 158,000,000 -24,000,000 -24,000,000             
          gain on sales of emission allowances
                                                                    -2,000,000 6,999,992 -5,000,000       
          loss on asset impairments
                                                                               
          sales of emission allowances
                                                                   2,000,000   -4,999,995 2,000,000 1,000,000 2,000,000 59,000,000 8,000,000   
          generator advances received for construction
                                                                               
          coal contract settlement
                                                                               
          gain on sales of noncore properties
                                                                               
          minority interest
                                                                   4,000,000 9,000,000 8,000,000 8,000,000 -19,999,973 7,000,000 6,000,000 7,000,000 4,000,000 11,000,000   
          ct acquisitions
                                                                              
          proceeds from sales of noncore properties
                                                                               
          dividends paid to minority interest holder
                                                                   -7,000,000 -8,000,000 -8,000,000 -7,000,000         
          adjustments to reconcile net income to net cash
                                                                               
          provided by operating activities:
                                                                               
          pension and other postretirement benefit obligations
                                                                    -13,000,000 -7,000,000 22,000,000 -86,999,973 37,000,000 29,000,000 21,000,000 8,000,000 43,000,000   
          counterparty collateral asset
                                                                    203,000,000           
          counterparty collateral liability
                                                                    -77,000,000           
          taum sauk insurance receivable
                                                                    39,000,000           
          mark-to-market gain on derivatives
                                                                               
          mark-to-market (gain) loss on derivatives
                                                                      -16,000,000         
          cumulative effect of change in accounting principle
                                                                               
          cash paid during the periods:
                                                                               
          loss on sale of noncore properties
                                                                               
          proceeds from sale of noncore properties
                                                                               
          dividends paid to minority interest
                                                                        -6,000,000   -7,000,000    
          gains on sale of emission allowances
                                                                               
          changes in assets and liabilities, excluding the effects of acquisitions:
                                                                               
          acquisitions, net of cash acquired
                                                                               
          bond repurchase
                                                                               
          nuclear fuel lease
                                                                               
          loss on sale of leveraged leases
                                                                              
          proceeds from sale of leveraged leases
                                                                              
          borrowings from credit facility
                                                                               
          pension and postretirement benefit contributions
                                                                               
          changes in assets and liabilities, excluding the effects of the acquisitions:
                                                                               
          deferred income taxes
                                                                              3,000,000 
          deferred investment tax credits
                                                                               
          the accompanying notes are an integral part of these consolidated financial statements.
                                                                               
          voluntary retirement and other restructuring charges
                                                                               
          pension contribution