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Derivative Financial Instruments and Risk Management- Summary of Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Derivatives Fair Value |  |
Carrying Value of the Hedged Liabilities | $ 6,517 | $ 5,810
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities | (31) | (186)
Long-term debt due within one year |  |
Derivatives Fair Value |  |
Carrying Value of the Hedged Liabilities | 1,101 | 483
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities | 3 | (16)
Long-term debt due after one year |  |
Derivatives Fair Value |  |
Carrying Value of the Hedged Liabilities | 5,416 | 5,327
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Value of the Hedged Liabilities | $ (34) | $ (170)

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