Derivatives and Hedge Accounting - Fair Value Hedging Relationships (Details) - Derivatives designated as hedging instruments - Fair value hedging - Foreign exchange contracts - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ 30	$ (25)	$ 9	$ (52)
Gains/(losses) recognized in earnings for excluded components	16	(4)	11	(23)
Gains/(losses) recognized in earnings for hedged items	(30)	25	(9)	52
Net Impact	$ 16	$ (4)	$ 11	$ (23)

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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