Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest Income (Expense), Net [Abstract]
Interest and Fees and Loans	$ 581	$ 537	$ 1,731	$ 1,548
Interest on Money Market Investments	8	8	26	20
Interest on Securities	88	86	279	257
Total Interest Income	677	631	2,036	1,825
Interest Expense [Abstract]
Interest on Deposits	69	38	192	87
Interest on short- and long-term borrowings	41	28	131	84
Total Interest Expense	110	66	323	171
Net interest income	567	565	1,713	1,654
Provision for loan losses	8	11	30	46
Provision for unfunded lending commitments	2	0	5	0
Provision for Credit Losses	10	11	35	46
Interest Income (Expense), after Provision for Loan Loss	(557)	(576)	(1,678)	(1,700)
Noninterest income:
Commercial account fees	31	31	90	93
Card fees	24	24	70	70
Retail and business banking fees	20	19	58	58
Loan-related fees and income	21	17	55	55
Capital Markets and Foreign Exchange Gain (Loss)	23	14	59	41
Wealth management and trust income	16	14	45	41
Other customer-related fees	5	7	15	19
Customer-related Fees	140	126	392	377
Dividends and Other Investment Income	4	11	18	36
Securities Gains, Net	2	(1)	0	(1)
Noninterest Income	146	136	410	412
Noninterest expense:
Salaries and Employee Benefits	273	264	835	800
Occupancy, Net	34	33	99	96
Furniture, Equipment, and Software, Net	34	30	101	95
Other real estate expense, net	2	(1)	3	(1)
Credit-Related Expense	2	5	16	19
Professional and Legal Fees	10	12	33	37
Advertising	6	8	17	20
FDIC Premiums	7	18	19	44
Other	51	49	153	147
Total Noninterest Expense	415	420	1,270	1,259
Income Before Income Taxes	288	292	818	853
Income taxes	66	69	185	195
Net income	222	223	633	658
Preferred Stock Dividends	(8)	(8)	(25)	(25)
Net Earnings Available to Common Shareholders	$ 214	$ 215	$ 608	$ 633
Weighted average common shares outstanding during the period:
Weighted Average Number of Shares Outstanding, Basic	173,160	192,973	178,985	195,079
Weighted Average Number of Shares Outstanding, Diluted	181,870	205,765	188,895	208,657
Earnings Per Share, Basic	$ 1.23	$ 1.11	$ 3.38	$ 3.22
Earnings Per Share, Diluted	$ 1.17	$ 1.04	$ 3.20	$ 3.01