Interim Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income:
Loans	$ 519	$ 369	$ 1,422	$ 1,117
Investment securities:
Taxable	332	156	807	452
Non-taxable	28	15	73	42
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	5	3	12	23
Total interest income	884	543	2,314	1,634
Interest expense:
Deposits	19	8	41	51
Borrowings	13	7	33	18
Total interest expense	32	15	74	69
Net interest income	852	528	2,240	1,565
Provision for credit losses	21	(52)	75	258
Net interest income after provision for credit losses	831	580	2,165	1,307
Noninterest income:
Gains on investment securities, net	189	190	661	271
Gains on equity warrant assets, net	147	54	491	94
Client investment fees	20	32	55	107
Wealth management and trust fees	22	0	22	0
Foreign exchange fees	65	44	189	128
Credit card fees	34	23	93	72
Deposit service charges	29	22	82	67
Lending related fees	21	13	55	38
Letters of credit and standby letters of credit fees	13	12	39	35
Investment banking revenue	90	92	335	281
Commissions	17	16	58	49
Other	25	49	97	76
Total noninterest income	672	547	2,177	1,218
Noninterest expense:
Compensation and benefits	548	327	1,418	903
Professional services	104	67	282	170
Premises and equipment	54	31	124	85
Net occupancy	25	19	60	56
Business development and travel	6	2	13	19
FDIC and state assessments	13	7	33	19
Merger-related charges	83	0	102	0
Other	46	38	136	118
Total noninterest expense	879	491	2,168	1,370
Income before income tax expense	624	636	2,174	1,155
Income tax expense	149	162	509	300
Net income before noncontrolling interests	475	474	1,665	855
Net income attributable to noncontrolling interests	(88)	(28)	(226)	(40)
Preferred stock dividends	(22)	(4)	(40)	(12)
Net income available to common stockholders	$ 365	$ 442	$ 1,399	$ 803
Earnings per common share—basic (dollars per share)	$ 6.33	$ 8.53	$ 25.54	$ 15.55
Earnings per common share—diluted (dollars per share)	$ 6.24	$ 8.47	$ 25.16	$ 15.46