CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Securities borrowed or purchased under agreements to resell, at fair value	$ 321,347	$ 274,062
Trading account assets, pledged to creditors	245,069	193,291
Available-for-sale securities, pledged to creditors	8,563	5,389
Held-to-maturity debt securities, fair value	185,346	224,410
Held-to-maturity debt securities, pledged to creditors	74	0
Equity securities, at fair value	684	578
Loans, net of unearned income, at fair value	733,905	694,488
Mortgage servicing rights, at fair value	748	760
Other assets, at fair value	113,116	102,206
Securities loaned or sold under agreements to repurchase, at fair value	349,726	254,755
Brokerage payables, at fair value	89,596	66,601
Short-term borrowings, at fair value	54,760	48,505
Long-term debt, at fair value	$ 315,846	$ 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)	762,000	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)	3,099,751,185	3,099,719,006
Treasury stock (in shares)	1,310,485,026	1,222,647,540
Recurring
Deposits, at fair value	$ 3,684	$ 3,608
Consumer loans
Loans, net of unearned income, at fair value	398,628	393,102
Corporate loans
Loans, net of unearned income, at fair value	335,277	301,386
Fair value
Securities borrowed or purchased under agreements to resell, at fair value	164,778	140,855
Other assets, at fair value	15,584	13,703
Securities loaned or sold under agreements to repurchase, at fair value	202,192	49,154
Brokerage payables, at fair value	4,900	5,207
Short-term borrowings, at fair value	25,023	12,484
Long-term debt, at fair value	129,817	112,719
Fair value | Consumer loans
Loans, net of unearned income, at fair value	26	281
Fair value | Corporate loans
Loans, net of unearned income, at fair value	$ 7,870	$ 7,759