v3.25.2
Derivative Financial Instruments - Gains and Losses on Hedged Items in Fair Value Hedges (Detail) - Net interest income - 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) [Line Items]        
Gain (Loss) on Derivatives $ 52 $ 63 $ (65) $ 308
Gain (Loss) on Hedged Items (7) (64) 127 (310)
Asset-backed securities available-for-sale | Interest rate contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Derivatives (20) 104 (197) 472
Gain (Loss) on Hedged Items 228 81 572 (113)
Deposits | Interest rate contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Derivatives 36 (8) 44 (31)
Gain (Loss) on Hedged Items (28) (27) (59) (39)
Long-term debt | Interest rate contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Derivatives 36 (33) 88 (133)
Gain (Loss) on Hedged Items $ (207) $ (118) $ (386) $ (158)