Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENT LIABILITIES - Commitments to Extend Credit (Details)

v3.10.0.1
COMMITMENTS AND CONTINGENT LIABILITIES - Commitments to Extend Credit (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Commercial    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk $ 16,594 $ 16,219
Consumer    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk 14,798 13,384
Commercial real estate    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk 1,182 1,366
Standby letters of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk 623 510
Commercial | Commercial letters-of-credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract amount represents credit risk $ 33 $ 21