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v3.25.1

Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Accumulated other comprehensive income (loss) |  | $ 19,804 |  | $ 19,522 |
Interest Rate Derivatives, Tax |  | (61) | $ (27) |  |
Gains and Losses on Cash Flow Hedges |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Accumulated other comprehensive income (loss) |  | (33) | (30) | (29) | $ (53)
Net current period other comprehensive income (loss) |  | (4) | 23 |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | (5) | 22 |  |
Gains and Losses on Cash Flow Hedges | Interest Rate Swap |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Losses reclassified from net accumulated other comprehensive loss | [1] | 1 | 1 |  |
Defined Benefit Pension and Postretirement Items |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Accumulated other comprehensive income (loss) |  | (39) | (41) | (39) | (41)
Net current period other comprehensive income (loss) |  | 0 | 0 |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | 0 | 0 |  |
Defined Benefit Pension and Postretirement Items | Interest Rate Swap |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Losses reclassified from net accumulated other comprehensive loss | [1] | 0 | 0 |  |
Total |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Accumulated other comprehensive income (loss) |  | (72) | (71) | $ (68) | $ (94)
Net current period other comprehensive income (loss) |  | (4) | 23 |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | (5) | 22 |  |
Total | Interest Rate Swap |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |
Losses reclassified from net accumulated other comprehensive loss | [1] | $ 1 | $ 1 |  |
[1] | Included in interest charges.

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