Annual report pursuant to Section 13 and 15(d)

Derivatives - Economic Hedges (Details)

v3.6.0.2
Derivatives - Economic Hedges (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives not designated as hedging $ 5 $ 11 $ (9)
Interest rate lock commitments      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives not designated as hedging 533 714 776
Mortgage banking income | Interest rate risk on mortgage banking income      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives not designated as hedging 461 254 1,017
Other income | Credit risk on loans      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives not designated as hedging (107) (22) 16
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 (754) (222) (3,683)
Personnel expense | Price risk on restricted stock awards      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives not designated as hedging $ 9 $ (267) $ 600