CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Securities borrowed or purchased under agreements to resell, at fair value	$ 390,215	$ 274,062
Trading account assets, pledged to creditors	226,644	193,291
Available-for-sale securities, pledged to creditors	5,729	5,389
Held-to-maturity debt securities, fair value	205,187	224,410
Held-to-maturity debt securities, pledged to creditors	63	0
Equity securities, at fair value	576	578
Loans, net of unearned income, at fair value	702,056	694,488
Mortgage servicing rights, at fair value	751	760
Other assets, at fair value	106,067	102,206
Securities loaned or sold under agreements to repurchase, at fair value	403,959	254,755
Brokerage payables, at fair value	78,302	66,601
Short-term borrowings, at fair value	49,139	48,505
Long-term debt, at fair value	$ 295,684	$ 287,300
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, authorized shares (in shares)	30,000,000	30,000,000
Preferred stock, issued shares, at aggregate liquidation value (in shares)	734,000	714,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	6,000,000,000	6,000,000,000
Common stock, issued shares (in shares)	3,099,749,982	3,099,719,006
Treasury stock (in shares)	1,232,016,302	1,222,647,540
Recurring
Deposits, at fair value	$ 4,226	$ 3,608
Consumer loans
Loans, net of unearned income, at fair value	386,312	393,102
Corporate loans
Loans, net of unearned income, at fair value	315,744	301,386
Fair value
Securities borrowed or purchased under agreements to resell, at fair value	264,874	140,855
Other assets, at fair value	15,875	13,703
Securities loaned or sold under agreements to repurchase, at fair value	159,823	49,154
Brokerage payables, at fair value	6,970	5,207
Short-term borrowings, at fair value	18,621	12,484
Long-term debt, at fair value	117,248	112,719
Fair value | Consumer loans
Loans, net of unearned income, at fair value	278	281
Fair value | Corporate loans
Loans, net of unearned income, at fair value	$ 7,887	$ 7,759