Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
OPERATING ACTIVITIES
Net income	$ 841	$ 424
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Provision (benefit) for credit losses	566	(32)
Deferred tax expense	80	9
Depreciation, amortization, and accretion, net	399	102
Stock based compensation expense	17	0
Realized gain on sales of investment securities available for sale, net	0	(33)
Fair value adjustment on marketable equity securities, net	5	(31)
Gain on sale of loans, net	(16)	(27)
Gain on sale of operating lease equipment, net	(10)	0
Loss on sale of premises and equipment, net	1	0
Gain on other real estate owned, net	(13)	(3)
Gain on acquisition	(431)	0
Gain on extinguishment of debt	(7)	0
Origination of loans held for sale	(320)	(861)
Proceeds from sale of loans held for sale	388	808
Net change in other assets	84	(747)
Net change in other liabilities	216	(11)
Other operating activities	(29)	(9)
Net cash provided by (used in) operating activities	1,771	(411)
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease (increase) in interest-earning deposits at banks	5,817	(5,528)
Purchases of marketable equity securities	0	(2)
Proceeds from sales of investments in marketable equity securities	0	1
Purchases of investment securities available for sale	(1,813)	(3,621)
Proceeds from maturities of investment securities available for sale	927	1,968
Proceeds from sales of investment securities available for sale	0	1,367
Purchases of investment securities held to maturity	0	(1,199)
Proceeds from maturities of investment securities held to maturity	699	606
Net change in loans	(4,648)	275
Proceeds from sales of loans	173	0
Purchases of operating lease equipment	(464)	0
Proceeds from sales of operating lease equipment	58	0
Purchases of premises and equipment	(81)	(72)
Proceeds from sales of premises and equipment	13	1
Proceeds from sales of other real estate owned	38	30
Acquisition, net of cash acquired	134	0
Other investing activities	(67)	(35)
Net cash provided by (used in) investing activities	786	(6,209)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in time deposits	(1,741)	(314)
Net change in demand and other interest-bearing deposits	(1,831)	6,949
Net change in securities sold under customer repurchase agreements	(11)	22
Repayment of short-term borrowings	(450)	0
Proceeds from issuance of short-term borrowings	3,000	0
Repayment of long-term borrowings	(3,740)	(29)
Proceeds from issuance of long-term borrowings	3,253	0
Repurchase of Class A common stock	(792)	0
Cash dividends paid	(58)	(32)
Other financing activities	(44)	0
Net cash (used in) provided by financing activities	(2,414)	6,596
Change in cash and due from banks	143	(24)
Cash and due from banks at beginning of period	338	362
Cash and due from banks at end of period	481	338
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	315	49
Income taxes	(12)	871
Significant non-cash investing and financing activities:
Transfers of loans to other real estate	13	8
Transfers of premises and equipment to other real estate	18	9
Dividends declared but not paid	1	0
Transfer of assets from held for investment to held for sale	98	73
Transfer of assets from held for sale to held for investment	19	2
Loans held for sale exchanged for investment securities	38	177
Commitments extended during the period on affordable housing investment credits	55	15
Common Stock | Issued for Acquisition
Issuance of stock	5,279	0
Common Stock | Issued for Stock Based Compensation
Issuance of stock	81	0
Preferred Stock | Issued for Acquisition
Issuance of stock	$ 541	$ 0