Derivative Financial Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Amounts recorded in the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges | ||
| Hedging adjustments on discontinued hedging relationships | $ (100) | $ (114) |
| Balance Sheet Location [Axis]: us-gaap:LongTermDebtNoncurrent | ||
| Amounts recorded in the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges | ||
| Carrying amount of the hedged item | (6,105) | (6,656) |
| Cumulative hedging adjustments included in the carrying amount-assets/(liabilities) | 90 | 36 |
| Balance Sheet Location [Axis]: us-gaap:ShortTermBorrowings | ||
| Amounts recorded in the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges | ||
| Carrying amount of the hedged item | (494) | 0 |
| Cumulative hedging adjustments included in the carrying amount-assets/(liabilities) | $ 5 | $ 0 |