Derivative Financial Instruments - Impact of Derivatives on Consolidated Statement of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Cash settled deferred incentive compensation awards, accelerated expense	$ 147
Derivatives not designated as hedging instruments
Derivative [Line Items]
Amount of gain (loss) on derivative recognized in income	833	$ 550	$ 799
Derivatives not designated as hedging instruments | Foreign exchange contracts | Foreign exchange trading services revenue
Derivative [Line Items]
Amount of gain (loss) on derivative recognized in income	938	811	922
Derivatives not designated as hedging instruments | Foreign exchange contracts | Interest expense
Derivative [Line Items]
Amount of gain (loss) on derivative recognized in income	(20)	68	63
Derivatives not designated as hedging instruments | Interest rate contracts | Foreign exchange trading services revenue
Derivative [Line Items]
Amount of gain (loss) on derivative recognized in income	3	3	3
Derivatives not designated as hedging instruments | Interest rate contracts | Other fee revenue
Derivative [Line Items]
Amount of gain (loss) on derivative recognized in income	1	0	0
Derivatives not designated as hedging instruments | Other derivative contracts
Derivative [Line Items]
Amount of gain (loss) on derivative recognized in income	$ (89)	$ (332)	$ (189)