Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income
Interest and fees on loans	$ 2,953	$ 1,295	$ 1,333
Interest on investment securities	354	145	144
Interest on deposits at banks	106	11	7
Interest and Dividend Income, Operating, Total	3,413	1,451	1,484
Interest expense
Deposits	335	33	67
Borrowings	132	28	29
Total interest expense	467	61	96
Net interest income	2,946	1,390	1,388
Provision for credit losses	645	(37)	58
Net interest income after provision for credit losses	2,301	1,427	1,330
Noninterest income
Rental income on operating lease equipment	864	0	0
Realized gain on sale of investment securities available for sale, net	0	33	60
Fair value adjustment on marketable equity securities, net	(3)	34	29
Bank-owned life insurance	32	3	3
Gain on sale of leasing equipment, net	15	0	0
Gain on acquisition	431	0	0
Gain on extinguishment of debt	7	0	0
Noninterest Income, Other	97	36	44
Noninterest Income, Total	2,136	508	477
Noninterest expense
Depreciation on operating lease equipment	345	0	0
Maintenance and other operating lease expenses	189	0	0
Salaries and benefits	1,396	759	722
Net occupancy expense	194	117	117
Equipment expense	216	119	116
Professional fees	57	20	17
Third-party processing fees	103	60	45
FDIC insurance expense	31	14	13
Marketing expense	53	10	10
Merger-related expenses	231	29	17
Intangible asset amortization	23	12	15
Other expenses	237	94	117
Noninterest Expense, Total	3,075	1,234	1,189
Income before income taxes	1,362	701	618
Income tax expense	264	154	126
Net income	1,098	547	492
Preferred stock dividends	50	18	14
Net income available to common stockholders, basic	1,048	529	478
Net income available to common shareholders, diluted	$ 1,048	$ 529	$ 478
Earnings per common share
Earnings per common share, basic (in dollars per share)	$ 67.47	$ 53.88	$ 47.50
Earnings per common share, diluted (in dollars per share)	$ 67.40	$ 53.88	$ 47.50
Weighted average common shares outstanding
Weighted average common shares outstanding, basic (in shares)	15,531,924	9,816,405	10,056,654
Weighted average common shares outstanding, diluted (in shares)	15,549,944	9,816,405	10,056,654
Fee income and other service charges
Noninterest income
Noninterest income	$ 163	$ 42	$ 37
Wealth management services
Noninterest income
Noninterest income	142	129	103
Service charges on deposit accounts
Noninterest income
Noninterest income	100	95	88
Factoring commissions
Noninterest income
Noninterest income	104	0	0
Cardholder services, net
Noninterest income
Noninterest income	102	87	74
Merchant services, net
Noninterest income
Noninterest income	35	33	24
Insurance commissions
Noninterest income
Noninterest income	$ 47	$ 16	$ 15