CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INTEREST INCOME:
Interest and fees on loans and leases	$ 3,211	$ 3,012	$ 3,001
INTEREST EXPENSE:
Deposits interest expense	237	156	216
Federal funds purchased and securities sold under agreement to repurchase	16	32	192
Other short-term borrowed funds	67	89	4
Long-term borrowed funds	132	82	31
NONINTEREST INCOME:
Service charges and fees	575	574	640
Capital markets fees	88	91	53
Foreign exchange and trade finance fees	90	95	97
Other income	101	389	120
NONINTEREST EXPENSE:
Outside services	371	420	360
Occupancy	319	326	327
Related Party
INTEREST INCOME:
Interest and fees on loans and leases	70	72	56
INTEREST EXPENSE:
Deposits interest expense	0	0	15
Federal funds purchased and securities sold under agreement to repurchase	7	24	184
Other short-term borrowed funds	51	75	3
Long-term borrowed funds	76	64	16
NONINTEREST INCOME:
Service charges and fees	3	6	15
Capital markets fees	9	11	14
Foreign exchange and trade finance fees	19	58	(15)
Other income	(105)	(209)	(32)
NONINTEREST EXPENSE:
Outside services	11	22	20
Occupancy	$ 2	$ 1	$ 3