Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 10,952	$ 841
Adjustments to reconcile net income to cash provided by operating activities:
Provision for credit losses	1,126	566
Deferred tax expense	110	80
Depreciation, amortization, and accretion, net	(12)	399
Stock based compensation expense	4	17
Realized loss on sale of investment securities available for sale, net	26	0
Fair value adjustment on marketable equity securities, net	20	5
Loss (gain) on sale of loans, net	3	(6)
Gain on sale of operating lease equipment, net	(18)	(13)
Gain on sale of premises and equipment, net	0	(6)
Gain on other real estate owned, net	(3)	(13)
Gain on acquisition	(9,891)	(431)
Gain on extinguishment of debt	0	(7)
Origination of loans held for sale	(503)	(428)
Proceeds from sale of loans held for sale	475	487
Software impairment	21	0
Net change in other assets	(410)	59
Net change in other liabilities	(130)	216
Other operating activities	(11)	(29)
Net cash provided by operating activities	1,759	1,737
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in interest-earning deposits at banks	2,322	5,817
Purchases of investment securities available for sale	(8,415)	(1,813)
Proceeds from maturities of investment securities available for sale	774	952
Proceeds from sales of investment securities available for sale	245	0
Purchases of investment securities held to maturity	(213)	0
Proceeds from maturities of investment securities held to maturity	434	699
Net increase in securities purchased under agreements resell	(549)	0
Net decrease (increase) in loans	6,215	(4,257)
Proceeds from sales of loans	290	182
Net increase (decrease) in credit balances of factoring clients	287	(386)
Purchases of operating lease equipment	(815)	(464)
Proceeds from sales of operating lease equipment	178	58
Purchases of premises and equipment	(197)	(81)
Proceeds from sales of premises and equipment	0	13
Proceeds from sales of other real estate owned	15	38
Cash acquired, net of cash paid as consideration for acquisition	810	134
Other investing activities	1,406	(87)
Net cash provided by investing activities	2,787	805
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in time deposits	6,238	(1,741)
Net decrease in demand and other interest-bearing deposits	(5,658)	(1,831)
Net change in securities sold under customer repurchase agreements	7	(11)
Repayment of short-term borrowings	(2,250)	(450)
Proceeds from issuance of short-term borrowings	500	3,000
Repayment of long-term borrowings	(13,016)	(3,745)
Proceeds from issuance of long-term borrowings	9,990	3,253
Repurchase of Class A common stock	0	(792)
Cash dividends paid	(78)	(58)
Other financing activities	(6)	(24)
Net cash used in financing activities	(4,273)	(2,399)
Change in cash and due from banks	273	143
Cash and due from banks at beginning of period	518	338
Cash and due from banks at end of period	791	481
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	2,443	315
Income taxes	429	(12)
Significant non-cash investing and financing activities:
Transfers of loans to other real estate	20	13
Transfers of premises and equipment to other real estate	5	18
Dividends declared but not paid	0	1
Transfer of assets from held for investment to held for sale	309	101
Transfer of assets from held for sale to held for investment	14	21
Loans held for sale exchanged for investment securities	0	38
Commitments extended during the period on affordable housing investment credits	81	55
Purchase Money Note as consideration for SVBB Acquisition	35,808	0
Common Stock | Issued for Acquisition
Significant non-cash investing and financing activities:
Issuance of stock	0	5,279
Common Stock | Issued for Stock Based Compensation
Significant non-cash investing and financing activities:
Issuance of stock	0	81
Preferred Stock | Issued for Acquisition
Significant non-cash investing and financing activities:
Issuance of stock	$ 0	$ 541