Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Economic Hedges (Details)

v3.7.0.1
Derivatives - Economic Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Other    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging $ 1 $ 26
Interest rate lock commitments    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging 56 151
Mortgage banking income | Interest rate risk on mortgage banking income    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging (24) 546
Other income | Credit risk on loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging (2) (65)
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 (290) (884)
Personnel expense | Price risk on restricted stock awards    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) on derivatives not designated as hedging $ 104 $ (741)