Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest income:
Interest and fees on loans	$ 492	$ 514	$ 980	$ 1,046
Interest on money market investments	4	1	7	9
Interest on securities	74	80	145	161
Total interest income	570	595	1,132	1,216
Interest expense:
Interest on deposits	7	23	16	74
Interest on short- and long-term borrowings	8	9	16	31
Total interest expense	15	32	32	105
Net interest income	555	563	1,100	1,111
Provision for loan losses	(113)	161	(236)	401
Provision for unfunded lending commitments	(10)	7	(19)	25
Total provision for credit losses	(123)	168	(255)	426
Net interest income after provision for credit losses	678	395	1,355	685
Noninterest income:
Commercial account fees	34	30	66	61
Card fees	24	19	45	39
Retail and business banking fees	18	15	35	33
Loan-related fees and income	21	27	46	53
Capital markets and foreign exchange fees	17	18	32	42
Wealth management fees	12	9	24	21
Other customer-related fees	13	12	24	22
Customer-related fees	139	130	272	271
Fair value and nonhedge derivative gain (loss)	(5)	(12)	13	(23)
Dividends and other investment income	8	3	15	11
Securities gains (losses), net	63	(4)	74	(9)
Total noninterest income	205	117	374	250
Noninterest expense:
Salaries and employee benefits	272	267	560	540
Occupancy, net	33	32	66	65
Furniture, equipment and software, net	32	32	64	64
Other real estate expense, net	0	0	0	0
Credit-related expense	6	6	12	10
Professional and legal services	17	10	37	22
Advertising	4	3	9	6
FDIC premiums	6	7	13	12
Other	58	73	102	118
Total noninterest expense	428	430	863	837
Income before income taxes	455	82	866	98
Income taxes	101	16	190	18
Net income	354	66	676	80
Preferred stock dividends	(9)	(9)	(17)	(17)
Net earnings applicable to common shareholders	$ 345	$ 57	$ 659	$ 63
Weighted average common shares outstanding during the period:
Basic shares (in shares)	162,742	163,542	163,144	163,843
Diluted shares (in shares)	163,054	164,425	163,468	168,132
Net earnings per common share:
Basic (in dollars per share)	$ 2.08	$ 0.34	$ 3.98	$ 0.38
Diluted (in dollars per share)	$ 2.08	$ 0.34	$ 3.98	$ 0.37