Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details)

v3.8.0.1
COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Sep. 28, 2015
Future minimum sublease rental payments:        
Operating leases, future minimum payments due, future minimum sublease rentals, total $ 6      
2016 2      
2017 2      
2018 1      
2019 0      
2020 0      
Thereafter 0      
Operating lease, future minimum payments due:        
2016 59      
2017 55      
2018 53      
2019 38      
2020 34      
Thereafter 135      
Total rental expense for all operating leases 76 $ 65 $ 58  
Maximum        
Loss Contingencies [Line Items]        
Loss Contingency, Estimate of Possible Loss 55      
Minimum        
Loss Contingencies [Line Items]        
Loss Contingency, Estimate of Possible Loss 0      
Commitments to Sell Loans        
Loss Contingencies [Line Items]        
Commitments to sell residential real estate loans $ 700 819    
Maturity period of forward contracts relating mortgage banking business (less than) 1 year      
Standby letters of credit        
Loss Contingencies [Line Items]        
Contract amount represents credit risk $ 510 637    
Maturity period of guarantee 2 years      
Outstanding standby letters of credit $ 10 $ 8    
Cyberco Litigation        
Loss Contingencies [Line Items]        
Bankruptcy Court recommended judgment amount in Cyberco case, principle       $ 72
Commercial Portfolio Segment [Member] | Commercial letters-of-credit        
Loss Contingencies [Line Items]        
Maturity period of guarantee 90 days