Derivative Financial Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions |
Dec. 31, 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 | $ 0 | $ (13) |
| Cumulative hedging adjustments included in the carrying amount—assets/(liabilities) | $ 0 | $ (13) |
| Hedged Liability, Statement of Financial Position [Extensible Enumeration] | Short-term debt | Short-term debt |
| 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 | $ (6,656) | $ (6,497) |
| Cumulative hedging adjustments included in the carrying amount—assets/(liabilities) | $ 36 | $ 190 |
| Hedged Liability, Statement of Financial Position [Extensible Enumeration] | Long-term debt | Long-term debt |
| Hedging adjustments on discontinued hedging relationships | $ (114) | $ (155) |