Quarterly report [Sections 13 or 15(d)]

Derivatives - Other Risk Management Derivatives (Details)

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Derivatives - Other Risk Management Derivatives (Details) - Other income - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Interest rate risk on mortgage activities        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging $ 18 $ 55 $ 58 $ 15
Credit risk on loans        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging (20) (15) (42) (30)
Interest rate and foreign currency risk on asset and liability management activities        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging 623 (1,221) (1,863) (1,048)
Price risk on certain compensation plans        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging $ 264 $ 152 $ 445 $ 447