Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities:
Net income	$ 2,687	$ 1,944	$ 2,774
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax (benefit)	145	(184)	(62)
Amortization of other intangible assets	230	239	238
Other non-cash adjustments for depreciation, amortization and accretion, net	375	643	918
Losses related to investment securities, net	79	294	2
Provision for credit losses	75	46	20
Change in trading account assets, net	5	(123)	108
Change in accrued interest and fees receivable, net	(224)	(359)	(156)
Change in collateral deposits, net	(12,109)	(2,246)	7,821
Change in unrealized (gains) losses on foreign exchange derivatives, net	(7,191)	2,146	(1,125)
Change in other assets, net	1,672	(1,839)	421
Change in accrued expenses and other liabilities, net	743	(128)	557
Other, net	303	257	438
Net cash (used in) provided by operating activities	(13,210)	690	11,954
Investing Activities:
Net (increase) decrease in interest-bearing deposits with banks	(25,292)	13,928	4,765
Net decrease (increase) in securities purchased under resale agreements	13	(1,477)	(2,203)
Proceeds from sales of available-for-sale securities	10,973	4,917	4,590
Proceeds from maturities of available-for-sale securities	18,517	15,703	17,254
Purchases of available-for-sale securities	(44,301)	(23,089)	(18,029)
Proceeds from maturities of held-to-maturity securities	9,330	9,474	9,817
Purchases of held-to-maturity securities	(5)	(1,582)	(8,564)
Sale of loans	246	506	1,786
Net increase in loans	(7,369)	(4,746)	(1,667)
Business acquisitions, net of cash acquired	(194)	(61)	0
Purchases of equity investments and other long-term assets	(143)	(136)	(250)
Purchases of premises and equipment, net	(926)	(816)	(734)
Other, net	(332)	117	51
Net cash (used in) provided by investing activities	(39,483)	12,738	6,816
Financing Activities:
Net (decrease) increase in time deposits	(19)	2,820	1,673
Net increase (decrease) in all other deposits	40,971	(17,311)	(21,244)
Net increase (decrease) in securities sold under repurchase agreements	1,814	690	(398)
Net increase in other short-term borrowings	6,180	1,563	1,969
Proceeds from issuance of long-term debt, net of issuance costs	6,523	6,221	3,731
Payments for long-term debt and obligations under finance leases	(2,046)	(2,545)	(1,567)
Payments for redemption of preferred stock	(1,500)	0	0
Proceeds from issuance of preferred stock, net of issuance costs	2,323	0	0
Repurchases of common stock	(1,319)	(3,781)	(1,500)
Repurchases of common stock for employee tax withholding	(83)	(95)	(123)
Payments for cash dividends	(1,033)	(970)	(972)
Other, net	(20)	57	0
Net cash provided by (used in) financing activities	51,791	(13,351)	(18,431)
Net (decrease) increase	(902)	77	339
Cash and due from banks at beginning of period	4,047	3,970	3,631
Cash and due from banks at end of period	3,145	4,047	3,970
Supplemental disclosure:
Interest paid	8,951	6,184	1,354
Income taxes paid, net	$ 451	$ 423	$ 436