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) - Nonrecurring
$ in Millions
Dec. 31, 2017
USD ($)
Fair Value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
MSRs $ 190
Impaired loans 36
Other real estate owned 33
Total Gains/(Losses)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
MSRs 1
Impaired loans (5)
Other real estate owned (2)
Level 1 | Fair Value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
MSRs 0
Impaired loans 0
Other real estate owned 0
Level 2 | Fair Value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
MSRs 0
Impaired loans 0
Other real estate owned 0
Level 3 | Fair Value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
MSRs 190
Impaired loans 36
Other real estate owned $ 33