v3.26.1
Derivative Instruments - Gains (Losses) Recognized in Earnings for Other Economic Hedges and Customer-Related Positions (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Customer-Related Positions | Interest rate contracts | Purchased and written options        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings $ (44) $ 2 $ (97) $ 14
Customer-Related Positions | Interest rate contracts | Futures        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings (7) 1 (10) 2
Customer-Related Positions | Swaps        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 167 47 269 82
Customer-Related Positions | Credit contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings (4) (8) 6 (6)
Customer-Related Positions | Foreign exchange rate contracts | Purchased and written options        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 0 0 0 1
Customer-Related Positions | Foreign exchange rate contracts | Forwards, spots and swaps        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 50 66 94 114
Customer-Related Positions | Commodity contracts | Purchased and written options        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 1 15 2 14
Customer-Related Positions | Commodity contracts | Futures        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 160 45 255 4
Customer-Related Positions | Commodity contracts | Swaps        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings (160) (43) (202) 4
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Futures and forwards        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 14 1 11 25
Asset and Liability Management Positions | Other economic hedges | Interest rate contracts | Purchased and written options        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 41 38 98 68
Asset and Liability Management Positions | Other economic hedges | Swaps        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings (9) 13 (2) 69
Asset and Liability Management Positions | Other economic hedges | Foreign exchange forward contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 11 (19) 17 (17)
Asset and Liability Management Positions | Other economic hedges | Equity contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings 46 27 35 8
Asset and Liability Management Positions | Other economic hedges | Credit contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings (13) (12) 5 5
Asset and Liability Management Positions | Other economic hedges | Other        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in earnings $ (12) $ (82) $ (31) $ (82)