Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Other Risk Management Derivatives (Details)

v3.8.0.1
Derivatives - Other Risk Management Derivatives (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Interest rate lock commitments    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging $ 14 $ 56
Mortgage banking income | Interest rate risk on mortgage activities    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging (135) (24)
Other income | Credit risk on loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging (3) (2)
Other income | Interest rate and foreign currency risk on ALM activities    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging $ (139) $ (290)