Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest Income
Interest and fees on loans and leases	$ 1,886	$ 1,687	$ 3,725	$ 3,292
Interest and dividends on securities	300	294	602	585
Interest on other earning assets	20	13	52	38
Total interest income	2,206	1,994	4,379	3,915
Interest Expense
Interest on deposits	273	148	526	266
Interest on short-term borrowings	50	23	82	43
Interest on long-term debt	193	166	385	316
Total interest expense	516	337	993	625
Net Interest Income	1,690	1,657	3,386	3,290
Provision for credit losses	172	135	327	285
Net Interest Income After Provision for Credit Losses	1,518	1,522	3,059	3,005
Noninterest Income
Total noninterest income	1,352	1,222	2,554	2,402
Noninterest Expense
Personnel expense	1,120	1,074	2,207	2,113
Occupancy and equipment expense	184	187	371	381
Software expense	71	67	143	132
Outside IT services	29	32	59	64
Regulatory charges	19	39	37	79
Amortization of intangibles	32	31	64	64
Loan-related expense	30	26	55	55
Professional services	31	32	62	62
Merger-related and restructuring charges, net	23	24	103	52
Other expense	212	208	418	404
Total noninterest expense	1,751	1,720	3,519	3,406
Earnings
Income before income taxes	1,119	1,024	2,094	2,001
Provision for income taxes	234	202	411	388
Net income	885	822	1,683	1,613
Noncontrolling interests	(1)	3	5	6
Dividends on preferred stock	44	44	87	87
Net income available to common shareholders	$ 842	$ 775	$ 1,591	$ 1,520
Basic EPS (in dollars per share)	$ 1.10	$ 1.00	$ 2.08	$ 1.95
Diluted EPS (in dollars per share)	$ 1.09	$ 0.99	$ 2.06	$ 1.93
Basic weighted average shares outstanding (in shares)	765,958	775,836	765,052	777,716
Diluted weighted average shares outstanding (in shares)	774,603	785,750	774,329	788,362
Insurance income
Noninterest Income
Total noninterest income	$ 566	$ 481	$ 1,076	$ 917
Service charges on deposits
Noninterest Income
Total noninterest income	181	179	352	344
Investment banking and brokerage fees and commissions
Noninterest Income
Total noninterest income	131	109	242	222
Mortgage banking income
Noninterest Income
Total noninterest income	113	94	176	193
Trust and investment advisory revenues
Noninterest Income
Total noninterest income	70	72	138	144
Bankcard fees and merchant discounts
Noninterest Income
Total noninterest income	77	72	147	141
Checkcard fees
Noninterest Income
Total noninterest income	59	57	114	109
Operating lease income
Noninterest Income
Total noninterest income	35	36	70	73
Income from bank-owned life insurance
Noninterest Income
Total noninterest income	34	30	62	61
Other income
Noninterest Income
Total noninterest income	86	91	177	197
Securities gains (losses), net
Noninterest Income
Total noninterest income	0	1	0	1
Securities gains (losses), net
Gross realized gains	20	1	42	1
Gross realized losses	$ (20)	$ 0	$ (42)	$ 0