Interim Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest income:
Loans	$ 472	$ 365	$ 903	$ 748
Investment securities:
Taxable	251	142	475	296
Non-taxable	24	14	45	27
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	4	3	7	20
Total interest income	751	524	1,430	1,091
Interest expense:
Deposits	12	6	22	43
Borrowings	11	5	20	11
Total interest expense	23	11	42	54
Net interest income	728	513	1,388	1,037
Provision for credit losses	35	66	54	310
Net interest income after provision for credit losses	693	447	1,334	727
Noninterest income:
Gains on investment securities, net	305	35	472	81
Gains on equity warrant assets, net	122	27	344	40
Client investment fees	15	32	35	75
Foreign exchange fees	67	36	124	84
Credit card fees	31	21	59	50
Deposit service charges	28	21	53	45
Lending related fees	18	11	34	24
Letters of credit and standby letters of credit fees	13	11	26	23
Investment banking revenue	103	142	245	188
Commissions	17	17	41	33
Other	42	16	72	27
Total noninterest income	761	369	1,505	670
Noninterest expense:
Compensation and benefits	425	320	870	575
Professional services	97	64	178	103
Premises and equipment	37	28	70	55
Net occupancy	17	19	35	37
Business development and travel	3	3	7	17
FDIC and state assessments	10	7	20	12
Merger-related charges	19	0	19	0
Other	45	39	90	80
Total noninterest expense	653	480	1,289	879
Income before income tax expense	801	336	1,550	518
Income tax expense	173	88	360	137
Net income before noncontrolling interests	628	248	1,190	381
Net income attributable to noncontrolling interests	(113)	(14)	(138)	(12)
Preferred stock dividends	(13)	(5)	(18)	(8)
Net income available to common stockholders	$ 502	$ 229	$ 1,034	$ 361
Earnings per common share—basic (dollars per share)	$ 9.23	$ 4.44	$ 19.40	$ 7.00
Earnings per common share—diluted (dollars per share)	$ 9.09	$ 4.42	$ 19.10	$ 6.97