OTHER OPERATING EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Income and Expenses [Abstract]
Deposit insurance	$ 26	$ 26	$ 60	$ 46
Promotional expense	29	21	51	41
Settlements and operating losses	15	35	23	64
Postage and delivery	11	12	23	25
Other	58	77	115	141
Other operating expense	$ 139	$ 171	$ 272	$ 317