Derivative Financial Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Short-Term Debt | ||
| Amounts recorded in the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges | ||
| Carrying amount of the hedged item | $ (5) | $ (13) |
| Cumulative hedging adjustments included in the carrying amount-assets/(liabilities) | (5) | (13) |
| Long-Term Debt | ||
| Amounts recorded in the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges | ||
| Carrying amount of the hedged item | (6,627) | (6,497) |
| Cumulative hedging adjustments included in the carrying amount-assets/(liabilities) | 62 | 190 |
| Hedging adjustments on discontinued hedging relationships | $ (133) | $ (155) |