CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - SWEPCo (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Cash Flow Hedges, Tax | $ 6 | $ (9) | $ 2 | $ (3) |
| Amortization of Pension and OPEB Deferred Costs, Tax | 1 | 0 | 1 | 0 |
| SOUTHWESTERN ELECTRIC POWER COMPANY | ||||
| Cash Flow Hedges, Tax | 0 | 0 | 0 | 0 |
| Amortization of Pension and OPEB Deferred Costs, Tax | $ 0 | $ 0 | $ 0 | $ 0 |