Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest Income
Interest and fees on loans and leases	$ 1,839	$ 1,605
Interest and dividends on securities	302	291
Interest on other earning assets	32	25
Total interest income	2,173	1,921
Interest Expense
Interest on deposits	253	118
Interest on short-term borrowings	32	20
Interest on long-term debt	192	150
Total interest expense	477	288
Net Interest Income	1,696	1,633
Provision for credit losses	155	150
Net Interest Income After Provision for Credit Losses	1,541	1,483
Noninterest Income
Total noninterest income	1,202	1,180
Noninterest Expense
Personnel expense	1,087	1,039
Occupancy and equipment expense	187	194
Software expense	72	65
Outside IT services	30	32
Regulatory charges	18	40
Amortization of intangibles	32	33
Loan-related expense	25	29
Professional services	31	30
Merger-related and restructuring charges, net	80	28
Other expense	206	196
Total noninterest expense	1,768	1,686
Earnings
Income before income taxes	975	977
Provision for income taxes	177	186
Net income	798	791
Noncontrolling interests	6	3
Dividends on preferred stock	43	43
Net income available to common shareholders	$ 749	$ 745
Basic EPS (in dollars per share)	$ 0.98	$ 0.96
Diluted EPS (in dollars per share)	$ 0.97	$ 0.94
Basic weighted average shares outstanding (in shares)	764,135	779,617
Diluted weighted average shares outstanding (in shares)	774,071	791,005
Insurance income
Noninterest Income
Total noninterest income	$ 510	$ 436
Service charges on deposits
Noninterest Income
Total noninterest income	171	165
Investment banking and brokerage fees and commissions
Noninterest Income
Total noninterest income	111	113
Mortgage banking income
Noninterest Income
Total noninterest income	63	99
Trust and investment advisory revenues
Noninterest Income
Total noninterest income	68	72
Bankcard fees and merchant discounts
Noninterest Income
Total noninterest income	70	69
Checkcard fees
Noninterest Income
Total noninterest income	55	52
Operating lease income
Noninterest Income
Total noninterest income	35	37
Income from bank-owned life insurance
Noninterest Income
Total noninterest income	28	31
Other income
Noninterest Income
Total noninterest income	91	106
Securities gains (losses), net
Noninterest Income
Total noninterest income	0	0
Securities gains (losses), net
Gross realized gains	22	0
Gross realized losses	$ (22)	$ 0