Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Interest income
Interest and fees on loans	$ 2,236	$ 2,354
Interest on investment securities	414	282
Interest on deposits at banks	245	448
Total interest income	2,895	3,084
Interest expense
Deposits	893	928
Borrowings	339	339
Total interest expense	1,232	1,267
Net interest income	1,663	1,817
Provision for credit losses	154	64
Net interest income after provision for credit losses	1,509	1,753
Noninterest income
Rental income on operating lease equipment	270	255
Fair value adjustment on marketable equity securities, net	(5)	(4)
Gain on sale of leasing equipment, net	5	10
Loss on extinguishment of debt	0	(2)
Other noninterest income	14	38
Total noninterest income	635	627
Noninterest expense
Depreciation on operating lease equipment	98	96
Maintenance and other operating lease expenses	58	45
Personnel cost	818	744
Net occupancy expense	58	62
Equipment expense	136	114
Professional fees	25	25
Third-party processing fees	63	60
FDIC insurance expense	38	41
Marketing expense	32	14
Acquisition-related expenses	42	58
Intangible asset amortization	15	17
Other noninterest expense	110	100
Total noninterest expense	1,493	1,376
Income before income taxes	651	1,004
Income tax expense	168	273
Net income	483	731
Preferred stock dividends	15	15
Net income available to common stockholders, basic	468	716
Net income available to common shareholders, diluted	$ 468	$ 716
Earnings per common share
Basic (in dollars per share)	$ 34.47	$ 49.27
Diluted (in dollars per share)	$ 34.47	$ 49.26
Weighted average common shares outstanding
Basic (in shares)	13,575,231	14,533,302
Diluted (in shares)	13,575,231	14,536,442
Lending-related fees
Noninterest income
Noninterest income	$ 66	$ 59
Deposit fees and service charges
Noninterest income
Noninterest income	58	58
Client investment fees
Noninterest income
Noninterest income	53	50
Wealth management services
Noninterest income
Noninterest income	56	51
International fees
Noninterest income
Noninterest income	32	28
Factoring commissions
Noninterest income
Noninterest income	17	17
Cardholder services, net
Noninterest income
Noninterest income	41	40
Merchant services, net
Noninterest income
Noninterest income	14	12
Insurance commissions
Noninterest income
Noninterest income	$ 14	$ 15