OTHER OPERATING EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Income and Expenses [Abstract]
Deposit insurance	$ 26	$ 34
Promotional expense	24	22
Postage and delivery	12	12
Other	53	65
Other operating expense	$ 115	$ 133