Other Nonint Income and Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Noninterest Income
Gain on sale of Vantiv, Inc. shares	$ 331	$ 125	$ 327
Valuation adjustments on the warrant associated with Vantiv Holding, LLC	236	31	206
Gain on sale and exercise of the warrant associated with Vantiv Holding, LLC	89
Operating lease income	89	84	75
Income from the tax receivable agreement associated with Vantiv, Inc.	80	23	9
Equity method income from interest in Vantiv Holding, LLC	63	48	77
BOLI income (loss)	48	44	52
Cardholder fees	43	45	47
Gain on loan sales	38		3
Private equity investment income	28	27	24
Consumer loan and lease fees	23	25	27
Banking center income	21	30	34
Insurance income	14	13	25
Net losses on disposition and impairment of bank premises and equipment	(101)	(19)	(6)
Loss on swap associated with the sale of Visa, Inc. class B shares	(37)	(38)	(31)
Other, net	14	12	10
Total other noninterest income	979	450	879
Other Noninterest Expense
Impairment on affordable housing investments	145	135	108
Loan and lease	118	119	158
Marketing	110	98	114
FDIC insurance and other taxes	99	89	127
Operating Lease	74	67	57
Professional services fees	70	72	76
Losses and adjustments	55	188	221
Travel	54	52	54
Postal and courier	45	47	48
Data processing	45	41	42
Recruitment and education	33	28	26
Donations	29	18	24
Insurance	17	16	17
Supplies	16	15	16
Provision for (benefit from) for the reserve for unfunded commitments	4	(27)	(17)
Other, net	191	181	193
Total other noninterest expense	$ 1,105	$ 1,139	$ 1,264