Derivatives - Cumulative Basis Adjustment for Fair Value Hedges (Details) - Fair Value Hedge - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Location and Fair Value Amount of Derivative Instruments
Carrying value of the hedged (and formerly hedged) liabilities	$ 956	$ 924
Hedged Liability, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt
Long-Term Debt \| Derivatives designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Cumulative amount of fair value hedging adjustment included in carrying value of hedged liabilities for	$ (24)	$ (81)
Long-Term Debt \| Derivatives not designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Cumulative amount of fair value hedging adjustment included in carrying value of hedged liabilities for	$ (23)	$ 2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of liability hedged in fair value hedging relationship.

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Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

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Indicates line item in statement of financial position that includes hedged liability.

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