Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Economic Hedges (Details)

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Derivatives - Economic Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Other        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging $ (20) $ (1) $ (7) $ (4)
Interest rate lock commitments        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging 167 225 427 398
Mortgage banking income | Interest rate risk on mortgage banking income        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging (390) 196 (94) 376
Other income | Credit risk on loans        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging (31) (27) (58) (33)
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 585 (713) 266 (1,311)
Personnel expense | Price risk on restricted stock awards        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging $ 226 $ (338) $ (244) $ 26