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		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ (26)	$ (57)	$ (27)	$ (115)
Gains/(losses) recognized in earnings for excluded components	(18)	(15)	(19)	(27)
Gains/(losses) recognized in earnings for hedged items	26	57	27	115
Net Impact	$ (18)	$ (15)	$ (19)	$ (27)