OTHER OPERATING EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Deposit insurance	$ 28	$ 23	$ 88	$ 69
Promotional expense	25	19	76	60
Settlements and operating losses	10	10	33	74
Postage and delivery	12	12	35	37
Other	58	58	173	199
Other operating expense	$ 133	$ 122	$ 405	$ 439