Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest income
Interest and fees on loans	$ 2,270	$ 2,422	$ 4,506	$ 4,776
Interest on investment securities	419	330	833	612
Interest on deposits at banks	256	378	501	826
Total interest income	2,945	3,130	5,840	6,214
Interest expense
Deposits	894	975	1,787	1,903
Borrowings	356	334	695	673
Total interest expense	1,250	1,309	2,482	2,576
Net interest income	1,695	1,821	3,358	3,638
Provision for credit losses	115	95	269	159
Net interest income after provision for credit losses	1,580	1,726	3,089	3,479
Noninterest income
Rental income on operating lease equipment	272	259	542	514
Fair value adjustment on marketable equity securities, net	2	(2)	(3)	(6)
Gain on sale of leasing equipment, net	8	4	13	14
Loss on extinguishment of debt	0	0	0	(2)
Other noninterest income	42	39	56	77
Total noninterest income	678	639	1,313	1,266
Noninterest expense
Depreciation on operating lease equipment	100	98	198	194
Maintenance and other operating lease expenses	55	60	113	105
Personnel cost	810	745	1,628	1,489
Net occupancy expense	61	58	119	120
Equipment expense	131	126	267	240
Professional fees	30	24	55	49
Third-party processing fees	63	58	126	118
FDIC insurance expense	38	33	76	74
Marketing expense	32	18	64	32
Acquisition-related expenses	38	44	80	102
Intangible asset amortization	13	15	28	32
Other noninterest expense	129	107	239	207
Total noninterest expense	1,500	1,386	2,993	2,762
Income before income taxes	758	979	1,409	1,983
Income tax expense	183	272	351	545
Net income	575	707	1,058	1,438
Preferred stock dividends	14	16	29	31
Net income available to common stockholders, basic	561	691	1,029	1,407
Net income available to common shareholders, diluted	$ 561	$ 691	$ 1,029	$ 1,407
Earnings per common share
Basic (in dollars per share)	$ 42.36	$ 47.54	$ 76.73	$ 96.81
Diluted (in dollars per share)	$ 42.36	$ 47.54	$ 76.73	$ 96.80
Weighted average common shares outstanding
Basic (in shares)	13,237,226	14,534,499	13,405,295	14,533,900
Diluted (in shares)	13,237,226	14,534,499	13,405,295	14,535,472
Lending-related fees
Noninterest income
Noninterest income	$ 69	$ 63	$ 135	$ 122
Deposit fees and service charges
Noninterest income
Noninterest income	59	57	117	115
Client investment fees
Noninterest income
Noninterest income	52	54	105	104
Wealth management services
Noninterest income
Noninterest income	55	52	111	103
International fees
Noninterest income
Noninterest income	33	29	65	57
Factoring commissions
Noninterest income
Noninterest income	18	19	35	36
Cardholder services, net
Noninterest income
Noninterest income	41	40	82	80
Merchant services, net
Noninterest income
Noninterest income	13	12	27	24
Insurance commissions
Noninterest income
Noninterest income	$ 14	$ 13	$ 28	$ 28