OTHER OPERATING EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Income and Expenses [Abstract]
Deposit insurance	$ 32	$ 28	$ 87	$ 88
Promotional expense	24	25	73	76
Other	88	80	227	241
Other operating expense	$ 144	$ 133	$ 387	$ 405