Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 2,777	$ 11,466	$ 1,098
Adjustments to reconcile net income to cash provided by operating activities:
Provision for credit losses	431	1,375	645
Deferred tax expense (benefit)	6	(165)	206
Depreciation, amortization, and accretion, net	130	(57)	533
Stock based compensation expense	0	5	19
Realized (gain) loss on sale of investment securities, net	(6)	26	0
Fair value adjustment on marketable equity securities, net	(13)	11	3
(Gain) loss on sale of loans, net	(7)	2	(22)
Gain on sale of operating lease equipment, net	(30)	(20)	(15)
Loss on sale of premises and equipment, net	0	0	5
Gain on other real estate owned, net	(7)	(4)	(14)
Gain on acquisition	0	(9,808)	(431)
Loss (gain) on extinguishment of debt	2	0	(7)
Origination of loans held for sale	(1,078)	(740)	(499)
Proceeds from sale of loans held for sale	1,289	693	562
Impairment of premises and equipment and other assets	22	70	0
Net change in other assets	(495)	206	484
Net change in other liabilities	(34)	(379)	260
Other operating activities	1	(21)	(36)
Net cash provided by operating activities	2,988	2,660	2,791
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in interest-earning deposits at banks	12,245	5,416	6,965
Purchase of marketable equity securities	(6)	0	0
Proceeds from sales of investments in marketable equity securities	15	0	0
Purchases of investment securities available for sale	(22,490)	(12,839)	(1,985)
Proceeds from maturities of investment securities available for sale	7,445	2,084	1,237
Proceeds from sales of investment securities available for sale	1,493	495	2
Purchases of investment securities held to maturity	(792)	(213)	(755)
Proceeds from maturities of investment securities held to maturity	562	545	835
Net decrease (increase) in securities purchased under agreements to resell	315	(473)	0
Net (increase) decrease in loans	(7,484)	6,057	(5,344)
Proceeds from sales of loans	354	317	245
Net (decrease) increase in credit balances of factoring clients	(73)	94	(538)
Purchases of operating lease equipment	(1,106)	(1,023)	(771)
Proceeds from sales of operating lease equipment	250	243	95
Purchases of premises and equipment	(429)	(405)	(155)
Proceeds from sales of premises and equipment	0	0	13
Proceeds from sales of other real estate owned	19	19	48
Cash acquired, net of cash paid as consideration for acquisition	0	810	134
Proceeds from surrender of bank-owned life insurance policies	0	1,094	157
Other investing activities	(473)	208	(108)
Net cash (used in) provided by investing activities	(10,155)	2,429	75
CASH FLOWS FROM FINANCING ACTIVITIES
Net (decrease) increase in time deposits	(3,169)	5,634	568
Net increase (decrease) in demand and other interest-bearing deposits	12,630	(5,369)	(2,259)
Net (decrease) increase in securities sold under customer repurchase agreements	(118)	39	(153)
Repayment of short-term borrowings	0	(2,250)	(1,355)
Proceeds from issuance of short-term borrowings	0	500	3,105
Repayment of long-term borrowings	(450)	(13,120)	(5,099)
Proceeds from issuance of long-term borrowings	0	9,991	3,854
Repurchase of Class A common stock	(1,648)	0	(1,240)
Cash dividends paid	(158)	(117)	(83)
Other financing activities	(14)	(7)	(24)
Net cash provided by (used in) financing activities	7,073	(4,699)	(2,686)
Change in cash and due from banks	(94)	390	180
Cash and due from banks at beginning of period	908	518	338
Cash and due from banks at end of period	814	908	518
CASH PAYMENTS (REFUNDS) FOR:
Interest	5,079	3,686	525
Income taxes	763	514	(551)
Significant non-cash investing and financing activities:
Net settlement with FDIC for Purchase Money Note	80	0	0
Dividends declared but not paid	0	0	1
Transfer of assets from held for investment to held for sale	606	336	188
Commitments extended during the period on affordable housing investment credits	710	224	110
Purchase Money Note as consideration for SVBB Acquisition	0	35,808	0
Common Stock | Issued for Acquisition
Significant non-cash investing and financing activities:
Issuance of stock	0	0	5,279
Common Stock | Issued for Stock Based Compensation
Significant non-cash investing and financing activities:
Issuance of stock	0	0	81
Preferred Stock | Issued for Acquisition
Significant non-cash investing and financing activities:
Issuance of stock	$ 0	$ 0	$ 541