Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Narrative (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans Held-for-sale, Fair Value Disclosure $ 643 $ 413
Loans Receivable, Fair Value Disclosure $ 84 $ 93