Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Interest income
Loans and leases	$ 9,096	$ 9,528	$ 8,187
Investment securities	1,690	1,347	648
Deposits at banks	992	1,478	1,556
Total interest income	11,778	12,353	10,391
Interest expense
Deposits	3,559	3,864	2,497
Borrowings	1,405	1,346	1,182
Total interest expense	4,964	5,210	3,679
Net interest income	6,814	7,143	6,712
Provision for credit losses	514	431	1,375
Net interest income after provision for credit losses	6,300	6,712	5,337
Noninterest income
Rental income on operating lease equipment	1,096	1,048	971
Realized gain (loss) on sale of investment securities, net	3	6	(26)
Fair value adjustment on marketable equity securities, net	22	13	(11)
Gain on sale of leasing equipment, net	30	30	20
Gain on acquisition	0	0	9,808
Loss on extinguishment of debt	(9)	(2)	0
Other noninterest income	160	148	136
Total noninterest income	2,727	2,615	12,075
Noninterest expense
Depreciation on operating lease equipment	398	394	371
Maintenance and other operating lease expenses	244	219	222
Personnel cost	3,294	3,078	2,636
Net occupancy expense	238	242	244
Equipment expense	555	504	422
Professional fees	115	121	71
Third-party processing fees	268	230	205
FDIC insurance expense	141	138	158
Marketing expense	142	76	102
Acquisition-related expenses	141	210	470
Intangible asset amortization	54	63	57
Other noninterest expense	466	460	377
Total noninterest expense	6,056	5,735	5,335
Income before income taxes	2,971	3,592	12,077
Income tax expense	765	815	611
Net income	2,206	2,777	11,466
Preferred stock dividends	57	61	59
Net income available to common stockholders, basic	2,149	2,716	11,407
Net income available to common shareholders, diluted	$ 2,149	$ 2,716	$ 11,407
Earnings per common share
Basic (in dollars per share)	$ 165.24	$ 189.42	$ 785.14
Diluted (in dollars per share)	$ 165.24	$ 189.41	$ 784.51
Weighted average common shares outstanding
Basic (in shares)	13,002,455	14,341,872	14,527,902
Diluted (in shares)	13,002,455	14,342,655	14,539,613
Lending-related fees
Noninterest income
Noninterest income	$ 266	$ 257	$ 218
Deposit fees and service charges
Noninterest income
Noninterest income	241	230	200
Client investment fees
Noninterest income
Noninterest income	217	213	157
Wealth management services
Noninterest income
Noninterest income	229	211	188
International fees
Noninterest income
Noninterest income	136	119	91
Factoring commissions
Noninterest income
Noninterest income	73	75	82
Cardholder services, net
Noninterest income
Noninterest income	158	163	139
Merchant services, net
Noninterest income
Noninterest income	52	49	48
Insurance commissions
Noninterest income
Noninterest income	$ 53	$ 55	$ 54