Annual report pursuant to Section 13 and 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Non-recurring/Fair Values of Financial Instruments (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Non-recurring/Fair Values of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for sale $ 613 $ 413
Nonrecurring | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 33  
Other real estate owned 20  
Loans held for sale 145  
Nonrecurring | Total Gains/(Losses)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans (1)  
Other real estate owned 7  
Loans held for sale (11)  
Nonrecurring | Level 1 | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0  
Other real estate owned 0  
Nonrecurring | Level 2 | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0  
Other real estate owned 0  
Nonrecurring | Level 3 | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 33  
Other real estate owned 20  
Loans held for sale $ 145