Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Other Risk Management Derivatives (Details)

v3.10.0.1
Derivatives - Other Risk Management Derivatives (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Interest rate lock commitments        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging $ 14 $ 60 $ 28 $ 116
Mortgage banking income | Interest rate risk on mortgage activities        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging (26) 55 (161) 31
Other income | Credit risk on loans        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivatives not designated as hedging (2) (1) (5) (3)
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 $ 702 $ 238 $ 563 $ (52)