| Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
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| Net income | 546 | 686 | 630 | 892 | 765 | 744 | 886 |
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| Depreciation and amortization | 619 | 862 | 880 | 896 | 929 | 1,077 | 1,114 |
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| Amortization of nuclear fuel | 44 | 51 | 58 | 51 | 56 | 62 | 57 |
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| Amortization of deferred refueling outage | 21 | 26 | 25 | 25 | 22 | 18 | 17 |
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| Amortization of corporate-owned life insurance | 23 | 20 | 20 | 24 | 25 | 25 | 24 |
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| Stock compensation | 30 | 16 | 16 | 16 | 19 | 18 | 15 |
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| Net deferred income taxes and credits | 124 | 122 | 127 | 102 | 7 | -17 | -9 |
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| Allowance for equity funds used during construction | 3 | 2 | 17 | 29 | 23 | 11 | 20 |
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| Payments for asset retirement obligations | 22 | 18 | 18 | 23 | 13 | 22 | 12 |
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| Equity in earnings of equity method investees, net of income taxes | 5 | 10 | 8 | 8 | 7 | 7 | 8 |
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| Income from corporate-owned life insurance | - | 30 | 8 | 14 | 6 | 30 | 19 |
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| Sibley Unit 3 impairment loss and other regulatory disallowances | - | - | - | - | 35 | - | - |
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| Other | 2 | 3 | -1 | 14 | -1 | -1 | - |
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| Accounts receivable | -265 | 23 | 5 | -70 | 60 | -54 | -17 |
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| Accounts receivable pledged as collateral | 185 | -26 | 21 | -41 | 40 | -17 | 59 |
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| Fuel inventory and supplies | -55 | -30 | 22 | 62 | 106 | 102 | 89 |
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| Prepaid expenses and other current assets | 128 | -43 | -17 | 300 | 3 | -137 | -156 |
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| Accounts payable | 57 | 17 | 134 | -55 | 2 | -47 | 46 |
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| Accrued taxes | -76 | -8 | 7 | 41 | 32 | -9 | 3 |
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| Other current liabilities | 92 | -59 | -99 | -19 | 1 | -44 | -81 |
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| Changes in other assets | -67 | -80 | -119 | 252 | -81 | -22 | -8 |
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| Changes in other liabilities | - | - | -82 | -32 | 84 | 94 | -63 |
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| Cash Flows from Operating Activities | 1,498 | 1,749 | 1,754 | 1,352 | 1,802 | 1,980 | 1,984 |
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| Additions to property, plant and equipment | 1,070 | 1,210 | 1,560 | 1,973 | 2,167 | 2,334 | 2,337 |
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| Acquisition of Persimmon Creek, net of cash acquired | - | - | - | - | - | 218 | - |
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| Purchase of securities - trusts | 118 | 56 | 66 | 158 | 51 | 59 | 176 |
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| Sale of securities - trusts | 118 | 47 | 57 | 116 | 27 | 35 | 139 |
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| Investment in corporate-owned life insurance | - | 18 | 19 | 14 | 17 | 16 | 16 |
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| Proceeds from Life Insurance Policy | 7 | 162 | 66 | 77 | 35 | 119 | 102 |
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| Other investing activities | 18 | 5 | 11 | -38 | -19 | -1 | -26 |
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| Cash Flows used in Investing Activities | 197 | -1,080 | -1,534 | -1,914 | -2,152 | -2,472 | -2,262 |
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| Short-term debt, net | -104 | -177 | -247 | 841 | 173 | -382 | 256 |
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| Proceeds from term loan facility | - | - | - | - | 500 | - | - |
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| Repayment of term loan facility | - | - | - | - | - | 500 | - |
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| Collateralized short-term borrowings, net | - | -26 | 21 | -41 | 40 | -17 | 59 |
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| Issuance of common stock | - | - | - | 113 | - | - | - |
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| Proceeds from long-term debt | 291 | 2,373 | 889 | 497 | 568 | 2,445 | 1,414 |
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| Retirements of long-term debt | 396 | 701 | 251 | 432 | 411 | 440 | 812 |
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| Retirements of long-term debt of variable interest entities | 29 | 30 | 32 | 19 | - | - | - |
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| Proceeds From Borrowings Against Corporate Owned Life Insurance | 57 | 59 | 56 | 54 | 54 | 53 | 52 |
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| Repayment of borrowings against cash surrender value of corporate-owned life insurance | 4 | 128 | 55 | 62 | 28 | 90 | 76 |
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| Cash dividends paid | 475 | 463 | 465 | 498 | 535 | 570 | 597 |
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| Distributions to shareholders of noncontrolling interests | - | 9 | - | - | - | - | - |
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| Other financing activities | -21 | -7 | -14 | -9 | -11 | -6 | -16 |
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| Cash Flows from Financing Activities | -1,538 | -806 | -98 | 443 | 349 | 494 | 280 |
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| NET CHANGE IN CASH AND CASH EQUIVALENTS | 157 | -137 | 122 | -119 | -1 | 3 | 2 |
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