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v3.25.3

Segment Reporting (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |
Revenues | $ 952 |  |  | $ 929 |  |  | $ 2,687 | $ 2,616 |
Purchased power and fuel | 372 |  |  | 380 |  |  | 1,034 | 1,060 |
Generation, transmission and distribution | 112 |  |  | 131 |  |  | 336 | 337 |
Administrative and other | 99 |  |  | 102 |  |  | 291 | 294 |
Operating Expenses | 211 |  |  | 233 |  |  | 627 | 631 |
Depreciation and amortization | 148 |  |  | 126 |  |  | 427 | 369 |
Taxes other than income taxes | 47 |  |  | 44 |  |  | 139 | 132 |
Costs and Expenses | 778 |  |  | 783 |  |  | 2,227 | 2,192 |
Operating Income (Loss) | 174 |  |  | 146 |  |  | 460 | 424 |
Interest Expense, Debt | 62 |  |  | 57 |  |  | 182 | 168 |
Allowance for Funds Used During Construction, Capitalized Interest | (2) |  |  | (4) |  |  | (9) | (12) |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | 123 |  |  | 105 |  |  | 319 | 306 |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 103 | $ 62 | $ 100 | $ 94 | $ 72 | $ 109 | 265 | 275 |
Assets | $ 13,014 |  |  |  |  |  | 13,014 |  | $ 12,544
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  |  | $ 899 | $ 876 |

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