Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
reserve
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Capital Leases, Future Minimum Payments Receivable $ 1,700      
Total ALLL balance 764 $ 772 $ 721 $ 691
Loans and leases receivable net premium $ 446 428    
Number of days past due 30 days      
Allowance number of reserves | reserve 2      
Collateral for secured borrowings $ 37,600 46,500    
Commercial        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total ALLL balance 545 542 515 482
Consumer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total ALLL balance $ 219 $ 230 $ 206 $ 209
Threshold period past due for write-off 120 days