Derivatives and Hedging Activities - Schedule of Pre-Tax Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	$ 15	$ 35
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	10	22
Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	13	13
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	7	5
Credit
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(14)	(8)
Other
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(1)	3
Corporate services income
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	32	33
Corporate services income | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	12	13
Corporate services income | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	13	13
Corporate services income | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	7	5
Corporate services income | Credit
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	2
Corporate services income | Other
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer mortgage income
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	(4)
Consumer mortgage income | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer mortgage income | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer mortgage income | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer mortgage income | Credit
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer mortgage income | Other
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	(4)
Other income
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(18)	6
Other income | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(2)	9
Other income | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Other income | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Other income | Credit
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(14)	(10)
Other income | Other
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	$ (2)	$ 7