Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income
Interest and fees on loans	$ 2,430	$ 2,426	$ 7,206	$ 5,796
Interest on investment securities	358	180	970	407
Interest on deposits at banks	350	504	1,176	1,071
Total interest income	3,138	3,110	9,352	7,274
Interest expense
Deposits	1,004	769	2,907	1,632
Borrowings	338	351	1,011	841
Total interest expense	1,342	1,120	3,918	2,473
Net interest income	1,796	1,990	5,434	4,801
Provision for credit losses	117	192	276	1,126
Net interest income after provision for credit losses	1,679	1,798	5,158	3,675
Noninterest income
Rental income on operating lease equipment	262	248	776	719
Realized gain (loss) on sale of investment securities, net	4	(12)	4	(26)
Fair value adjustment on marketable equity securities, net	9	(1)	3	(20)
Gain on sale of leasing equipment, net	5	10	19	18
Gain on acquisition	0	12	0	9,891
Loss on extinguishment of debt	0	0	(2)	0
Other noninterest income	19	25	92	102
Total noninterest income	650	615	1,916	11,532
Noninterest expense
Depreciation on operating lease equipment	99	95	293	275
Maintenance and other operating lease expenses	59	51	164	163
Salaries and benefits	788	727	2,277	1,922
Net occupancy expense	62	65	182	179
Equipment expense	128	117	368	308
Professional fees	42	12	91	43
Third-party processing fees	55	54	173	139
FDIC insurance expense	31	36	105	76
Marketing expense	20	22	52	78
Acquisition-related expenses	46	121	148	354
Intangible asset amortization	15	17	47	40
Other noninterest expense	111	99	318	266
Total noninterest expense	1,456	1,416	4,218	3,843
Income before income taxes	873	997	2,856	11,364
Income tax expense	234	245	779	412
Net income	639	752	2,077	10,952
Preferred stock dividends	15	15	46	44
Net income available to common stockholders, basic	624	737	2,031	10,908
Net income available to common shareholders, diluted	$ 624	$ 737	$ 2,031	$ 10,908
Earnings per common share
Basic (in dollars per share)	$ 43.42	$ 50.71	$ 140.27	$ 750.79
Diluted (in dollars per share)	$ 43.42	$ 50.67	$ 140.26	$ 750.19
Weighted average common shares outstanding
Basic (in shares)	14,375,974	14,528,310	14,480,874	14,527,718
Diluted (in shares)	14,375,974	14,539,133	14,481,919	14,539,383
Fee income and other service charges
Noninterest income
Noninterest income	$ 81	$ 71	$ 233	$ 188
Client investment fees
Noninterest income
Noninterest income	55	52	159	106
Wealth management services
Noninterest income
Noninterest income	54	49	157	140
International fees
Noninterest income
Noninterest income	29	30	87	63
Service charges on deposit accounts
Noninterest income
Noninterest income	45	44	133	112
Factoring commissions
Noninterest income
Noninterest income	19	21	55	60
Cardholder services, net
Noninterest income
Noninterest income	42	41	122	103
Merchant services, net
Noninterest income
Noninterest income	12	12	36	36
Insurance commissions
Noninterest income
Noninterest income	$ 14	$ 13	$ 42	$ 40