OTHER INCOME (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Bank-owned life insurance income	$ 54	$ 54	$ 56
Other	37	105	50
Other income	$ 91	$ 159	$ 106