Derivatives and Hedge Accounting - Fair Value Hedging Relationships (Details) - Derivatives designated as hedging instruments - Fair value hedging - Foreign exchange contracts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ (103)	$ (85)	$ (177)
Gains/(losses) recognized in earnings for excluded components	(38)	(19)	(25)
Gains/(losses) recognized in earnings for hedged items	103	85	177
Net Impact	$ (38)	$ (19)	$ (25)