CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income	$ 393	$ 548	$ 688
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	(17)	112	262
Gain on sale of branch disposal group, net	0	(113)	0
Provision for credit losses	45	154	(570)
Deferred income tax provision	51	284	340
Net realized losses (gains) on securities available-for-sale	243	(26)	(73)
Net change in other assets and liabilities	1,359	(1,044)	172
Net change in loans held for sale:
Originations and purchases of loans held for sale	(340)	(1,932)	(2,544)
Sales and collections of loans held for sale	320	1,791	2,699
Net change in trading assets and liabilities	297	2,093	867
Lower of amortized cost or fair value adjustments on loans held for sale	32	19	14
Loss (gain) on instruments designated at fair value and related derivatives	42	50	(35)
Net cash provided by operating activities	2,425	1,936	1,820
Cash flows from investing activities
Net change in federal funds sold and securities purchased under agreements to resell	9,207	(12,571)	25,232
Securities available-for-sale:
Purchases of securities available-for-sale	(4,467)	(4,997)	(18,501)
Proceeds from sales of securities available-for-sale	1,642	1,812	10,324
Proceeds from paydowns and maturities of securities available-for-sale	4,988	5,992	12,030
Securities held-to-maturity:
Purchases of securities held-to-maturity	(8,592)	(3,585)	0
Proceeds from paydowns and maturities of securities held-to-maturity	880	1,460	3,747
Change in loans:
Originations, net of collections	(1,368)	(3,205)	(618)
Loans sold to third parties	1,806	1,476	2,758
Net cash used for acquisitions of properties and equipment	(29)	(42)	(3)
Cash received on transfer of certain precious metals trading and financing activities to an affiliate	10	0	0
Net outflow related to the sale of branch disposal group	0	(4,619)	0
Other, net	(140)	(17)	103
Net cash provided by (used in) investing activities	3,937	(18,296)	35,072
Cash flows from financing activities
Net change in deposits	(1,941)	(12,534)	(2,107)
Debt:
Net change in short-term borrowings	3,969	(393)	1,386
Issuance of long-term debt	4,553	5,931	7,711
Repayment of long-term debt	(4,448)	(3,229)	(10,044)
Preferred stock redemption	0	(1,000)	0
Return of capital to parent	0	(2,000)	(1,000)
Other decreases in capital surplus	(8)	(2)	(4)
Dividends paid	(1,516)	(77)	(77)
Net cash provided by (used in) financing activities	609	(13,304)	(4,135)
Net change in cash and due from banks and interest bearing deposits with banks	6,971	(29,664)	32,757
Cash and due from banks and interest bearing deposits with banks at beginning of period	18,748	48,412	15,655
Cash and due from banks and interest bearing deposits with banks at end of period	25,719	18,748	48,412
Supplemental disclosure of cash flow information
Interest paid during the period	5,123	1,660	606
Net income taxes refunded during the period	(108)	(122)	(52)
Supplemental disclosure of non-cash investing activities
Transfer of loans to (from) held for sale, net		$ (29)
Transfer of loans to (from) held for sale, net	$ 1,820		$ 6,982