Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest income:
Loans	$ 1,966	$ 1,520	$ 1,599
Investment securities:
Taxable	1,199	635	569
Non-taxable	106	61	45
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	18	26	97
Total interest income	3,289	2,242	2,310
Interest expense:
Deposits	62	60	178
Borrowings	48	25	35
Total interest expense	110	85	213
Net interest income	3,179	2,157	2,097
Provision for credit losses	123	220	107
Net interest income after provision for credit losses	3,056	1,937	1,990
Noninterest income:
Gains on investment securities, net	761	421	135
Gains on equity warrant assets, net	560	237	138
Client investment fees	75	132	182
Wealth management and trust fees	44	0	0
Foreign exchange fees	262	179	159
Credit card fees	131	98	119
Deposit service charges	112	90	89
Lending related fees	76	57	50
Letters of credit and standby letters of credit fees	51	47	43
Investment banking revenue	459	414	195
Commissions	79	67	56
Other	128	98	55
Total noninterest income	2,738	1,840	1,221
Noninterest expense:
Compensation and benefits	2,015	1,318	990
Professional services	392	247	205
Premises and equipment	178	127	97
Net occupancy	83	101	69
Business development and travel	24	24	69
FDIC and state assessments	48	28	18
Merger-related charges	129	0	0
Other	201	190	153
Total noninterest expense	3,070	2,035	1,601
Income before income tax expense	2,724	1,742	1,610
Income tax expense	651	448	425
Net income before noncontrolling interests	2,073	1,294	1,185
Net income attributable to noncontrolling interests	(240)	(86)	(48)
Preferred stock dividends	(63)	(17)	0
Net income available to common stockholders	$ 1,770	$ 1,191	$ 1,137
Earnings per common share—basic (usd per share)	$ 31.74	$ 23.05	$ 21.90
Earnings per common share—diluted (usd per share)	$ 31.25	$ 22.87	$ 21.73