CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - I&M (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Cash Flow Hedges, Tax | $ 1 | $ (4) | $ 3 | $ (7) |
| Amortization of Pension and OPEB Deferred Costs, Tax | 0 | 0 | 1 | 0 |
| INDIANA MICHIGAN POWER COMPANY | ||||
| Cash Flow Hedges, Tax | 0 | 0 | 0 | 0 |
| Amortization of Pension and OPEB Deferred Costs, Tax | $ 0 | $ 0 | $ 0 | $ 0 |