VARIABLE INTEREST ENTITIES - Schedule of Affordable Housing Tax Credit Investments (Details) - LIHTC Investments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Tax credits included in the provision for income taxes	$ 59	$ 45
Amortization expense included in the provision for income taxes	59	45
Other tax benefits included in the provision for income taxes	$ 21	$ 17