Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (650)	$ 2,419
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for credit losses	705	219
Amortization of intangibles	68	54
Depreciation	22	18
Amortization of discounts and premiums, net	94	(119)
Net (gain) loss on securities	0	1
Net gain on sales of loans	(38)	(45)
Gain on business acquisition	121	(2,142)
Stock-based compensation	21	20
Deferred tax expense	(153)	(44)
Changes in operating assets and liabilities:
Decrease (increase) in other miscellaneous assets	60	(71)
Increase (decrease) in other miscellaneous liabilities	50	(969)
Purchases of securities held for trading	0	(10)
Proceeds from sales of securities held for trading	0	10
Change in loans held for sale, net	202	(911)
Net cash provided by (used in) operating activities	502	(1,570)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from repayment of securities available for sale	1,029	1,148
Proceeds from sales of securities available for sale	201	1,341
Purchase of securities available for sale	(2,407)	(1,111)
Redemption of Federal Home Loan Bank stock	6	967
Purchases of Federal Home Loan Bank and Federal Reserve Bank stock	(179)	(836)
Proceeds from bank-owned life insurance, net	16	24
Net proceeds from sales of mortgage servicing rights	65	50
Other changes in loans, net	2,501	(2,433)
Purchases of premises and equipment, net	(60)	(53)
Cash acquired in business acquisition	0	25,043
Net cash provided by investing activities	1,172	24,140
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in deposits	(2,501)	(3,809)
Net increase (decrease) in short-term borrowed funds	5,370	(2,050)
Proceeds from long-term borrowed funds	10,800	500
Repayments of long-term borrowed funds	(8,550)	(3,374)
Net receipt (disbursement) of payments of loans serviced for others	(278)	367
Cash dividends paid on common stock	(45)	(239)
Cash dividends paid on preferred stock	(18)	(16)
Re-issuance of treasury stock	4	0
Proceeds from common stock and warrants issued	742	0
Proceeds from preferred stock issued	258	0
Payments relating to treasury shares received for restricted stock award tax payments	(9)	(11)
Net cash provided by (used in) financing activities	5,773	(8,632)
Net increase in cash, cash equivalents, and restricted cash	7,447	13,938
Cash, cash equivalents, and restricted cash at beginning of period (1)	11,609	2,082
Cash, cash equivalents, and restricted cash at end of period (1)	19,056	16,020
Supplemental information:
Cash paid for interest	1,657	1,043
Cash paid for income taxes	28	17
Non-cash investing and financing activities:
Transfers to repossessed assets from loans	8	1
Securitization of loans to mortgage-backed securities available for sale	194	109
Transfer of loans from held for investment to held for sale	7,021	0
Business Combination:
Fair value of tangible assets acquired	0	37,542
Intangible assets	0	464
Liabilities assumed	0	35,779
Issuance of FDIC Equity appreciation instrument	0	85
Restricted stock units
Non-cash investing and financing activities:
Shares issued for restricted stock awards	$ 4	$ 31