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Derivatives and Hedging Activities - Pre-Tax Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) $ 56 $ 100 $ 67
Interest rate      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 41 63 32
Foreign exchange      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 50 52 47
Commodity      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 22 23 14
Credit      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) (50) (40) (32)
Other      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) (7) 2 6
Corporate services income      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 115 131 95
Corporate services income | Interest rate      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 41 57 30
Corporate services income | Foreign exchange      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 50 52 47
Corporate services income | Commodity      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 22 23 14
Corporate services income | Credit      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 2 (1) 4
Corporate services income | Other      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Consumer mortgage income      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) (1) 4 13
Consumer mortgage income | Interest rate      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Consumer mortgage income | Foreign exchange      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Consumer mortgage income | Commodity      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Consumer mortgage income | Credit      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Consumer mortgage income | Other      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) (1) 4 13
Other income      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) (58) (35) (41)
Other income | Interest rate      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 6 2
Other income | Foreign exchange      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Other income | Commodity      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) 0 0 0
Other income | Credit      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) (52) (39) (36)
Other income | Other      
Derivative Instruments, Gain (Loss) [Line Items]      
Total net gains (losses) $ (6) $ (2) $ (7)