v3.26.1
Derivative Financial Instruments - Net Gains (Losses) Recorded in the Consolidated Statements of Income Relating to Free-Standing Derivative Instruments Used For Customer Accommodation (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Interest rate contracts | Contract revenue | Capital market fees    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings $ 10 $ 8
Interest rate contracts | Credit portion of fair value adjustment | Other noninterest expense    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings 1 (3)
Interest rate contracts | Interest rate lock commitments | Mortgage banking net revenue    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings 15 15
Commodity contracts | Contract revenue | Capital market fees    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings 12 6
Commodity contracts | Credit portion of fair value adjustment | Other noninterest expense    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings (5) 0
Foreign exchange contracts | Other noninterest income    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings 10 0
Foreign exchange contracts | Contract revenue | Capital market fees    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings 27 19
Foreign exchange contracts | Contract revenue | Other noninterest income    
Derivative Instruments, Gain (Loss)    
Net gains (losses) recorded in earnings $ 4 $ (10)