Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest Income
Interest and fees on loans and leases	$ 1,509	$ 1,249	$ 2,951	$ 2,486
Interest and dividends on securities	286	232	541	472
Interest on other earning assets	10	8	34	24
Total interest income	1,805	1,489	3,526	2,982
Interest Expense
Interest on deposits	64	55	128	110
Interest on short-term borrowings	3	1	5	2
Interest on long-term debt	121	121	247	246
Total interest expense	188	177	380	358
Net Interest Income	1,617	1,312	3,146	2,624
Provision for credit losses	111	97	295	196
Net Interest Income After Provision for Credit Losses	1,506	1,215	2,851	2,428
Noninterest Income
Insurance income	465	422	884	862
Service charges on deposits	166	154	320	299
Mortgage banking income	111	130	202	240
Investment banking and brokerage fees and commissions	102	108	199	202
Trust and investment advisory revenues	67	57	129	113
Bankcard fees and merchant discounts	60	55	116	105
Checkcard fees	50	43	95	82
Operating lease income	35	30	69	59
Income from bank-owned life insurance	31	27	62	57
FDIC loss share income, net	(64)	(64)	(124)	(143)
Other income	107	58	149	141
Securities gains (losses), net
Gross realized gains	0	2	45	2
Gross realized losses	0	0	0	0
OTTI charges	0	(2)	0	(2)
Non-credit portion recognized in OCI	0	(1)	0	(1)
Total securities gains (losses), net	0	(1)	45	(1)
Total noninterest income	1,130	1,019	2,146	2,016
Noninterest Expense
Personnel expense	1,039	864	1,954	1,694
Occupancy and equipment expense	194	166	385	333
Software expense	53	46	104	90
Loan-related expense	36	37	68	75
Outside IT services	44	29	85	59
Professional services	26	35	48	59
Amortization of intangibles	42	23	74	44
Regulatory charges	32	25	62	48
Foreclosed property expense	8	14	19	27
Merger-related and restructuring charges, net	92	25	115	38
(Gain) loss on early extinguishment of debt	0	172	(1)	172
Other expense	231	217	429	436
Total noninterest expense	1,797	1,653	3,342	3,075
Earnings
Income before income taxes	839	581	1,655	1,369
Provision for income taxes	252	80	498	321
Net income	587	501	1,157	1,048
Noncontrolling interests	3	10	9	32
Dividends on preferred stock	43	37	80	74
Net income available to common shareholders	$ 541	$ 454	$ 1,068	$ 942
Basic EPS (in dollars per share)	$ 0.67	$ 0.63	$ 1.34	$ 1.30
Diluted EPS (in dollars per share)	0.66	0.62	1.32	1.29
Cash dividends declared (in dollars per share)	$ 0.28	$ 0.27	$ 0.55	$ 0.51
Basic weighted average shares outstanding (in shares)	814,261	724,880	797,727	723,268
Diluted weighted average shares outstanding (in shares)	823,682	734,527	806,839	733,002