Derivative Financial Instruments and Risk Management- Summary of Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Derivatives Fair Value | ||
| Carrying Value of the Hedged Liabilities | $ 8,047 | $ 6,115 |
| Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities | (303) | (34) |
| Balance Sheet Location: us-gaap:LongTermDebtAndCapitalLeaseObligations | ||
| Derivatives Fair Value | ||
| Carrying Value of the Hedged Liabilities | 6,803 | 5,513 |
| Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities | (297) | (37) |
| Balance Sheet Location: us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent | ||
| Derivatives Fair Value | ||
| Carrying Value of the Hedged Liabilities | 1,244 | 602 |
| Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities | $ (6) | $ 3 |