Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income
Interest and fees on loans	$ 2,426	$ 785	$ 5,796	$ 2,061
Interest on investment securities	180	90	407	262
Interest on deposits at banks	504	31	1,071	50
Total interest income	3,110	906	7,274	2,373
Interest expense
Deposits	769	78	1,632	159
Borrowings	351	33	841	70
Total interest expense	1,120	111	2,473	229
Net interest income	1,990	795	4,801	2,144
(Benefit) provision for credit losses	192	60	1,126	566
Net interest income after provision for credit losses	1,798	735	3,675	1,578
Noninterest income
Rental income on operating lease equipment	248	219	719	640
Realized loss on sale of investment securities available for sale, net	(12)	0	(26)	0
Fair value adjustment on marketable equity securities, net	(1)	(2)	(20)	(5)
Bank-owned life insurance	1	8	8	25
Gain on sale of leasing equipment, net	10	2	18	13
Gain on acquisition	12	0	9,891	431
Gain on extinguishment of debt	0	1	0	7
Other noninterest income	21	37	89	79
Total noninterest income	615	433	11,532	1,707
Noninterest expense
Depreciation on operating lease equipment	95	87	275	257
Maintenance and other operating lease expenses	51	52	163	142
Salaries and benefits	727	353	1,922	1,054
Net occupancy expense	65	47	179	143
Equipment expense	117	55	308	161
Professional fees	12	11	44	34
Third-party processing fees	54	27	138	77
FDIC insurance expense	36	5	76	26
Marketing expense	25	15	81	32
Acquisition-related expenses	121	33	354	202
Intangible asset amortization	17	5	40	17
Other noninterest expense	96	70	263	170
Total noninterest expense	1,416	760	3,843	2,315
Income before income taxes	997	408	11,364	970
Income tax expense	245	93	412	129
Net income	752	315	10,952	841
Preferred stock dividends	15	12	44	36
Net income available to common stockholders, basic	737	303	10,908	805
Net income available to common shareholders, diluted	$ 737	$ 303	$ 10,908	$ 805
Earnings per common share
Basic (in dollars per share)	$ 50.71	$ 19.27	$ 750.79	$ 50.76
Diluted (in dollars per share)	$ 50.67	$ 19.25	$ 750.19	$ 50.70
Weighted average common shares outstanding
Basic (in shares)	14,528,310	15,711,976	14,527,718	15,849,219
Diluted (in shares)	14,539,133	15,727,993	14,539,383	15,867,314
Fee income and other service charges
Noninterest income
Noninterest income	$ 70	$ 41	$ 185	$ 112
Client investment fees
Noninterest income
Noninterest income	52	0	106	0
Wealth management services
Noninterest income
Noninterest income	49	35	140	107
International fees
Noninterest income
Noninterest income	34	3	71	7
Service charges on deposit accounts
Noninterest income
Noninterest income	44	21	112	76
Factoring commissions
Noninterest income
Noninterest income	21	24	60	78
Cardholder services, net
Noninterest income
Noninterest income	41	25	103	76
Merchant services, net
Noninterest income
Noninterest income	12	8	36	27
Insurance commissions
Noninterest income
Noninterest income	$ 13	$ 11	$ 40	$ 34