OTHER OPERATING EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expenses [Abstract]
Deposit insurance	$ 32	$ 26
Promotional expense	26	24
Settlements and operating losses	13	8
Other	55	57
Other operating expense	$ 126	$ 115