CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Securities borrowed or purchased under agreements to resell, at fair value	$ 315,072	$ 294,712
Trading account assets, pledged to creditors	175,125	168,967
Available-for-sale securities, pledged to creditors	6,740	5,921
Held-to-maturity securities, pledged to creditors	1,031	547
Equity securities, at fair value	784	1,066
Loans, net of unearned income	665,988	675,883
Mortgage servicing rights	433	336
Other assets, at fair value	109,433	110,683
Interest-bearing deposits in U.S. offices	497,335	503,213
Interest-bearing deposits in offices outside the U.S.	563,786	549,973
Securities loaned or sold under agreements to repurchase, at fair value	219,168	199,525
Short-term borrowings, at fair value	32,087	29,514
Long-term debt, at fair value	256,335	271,686
Other liabilities	$ 62,404	$ 59,983
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)	811,200	779,200
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)	3,099,690,888	3,099,763,661
Treasury stock (in shares)	1,032,643,369	1,017,674,452
Consumer
Loans, net of unearned income	$ 274,034	$ 288,839
Corporate
Loans, net of unearned income	391,954	387,044
Fair value
Securities borrowed or purchased under agreements to resell, at fair value	198,908	185,204
Other assets, at fair value	10,175	14,613
Interest-bearing deposits in U.S. offices	962	879
Interest-bearing deposits in offices outside the U.S.	2,178	1,079
Securities loaned or sold under agreements to repurchase, at fair value	68,713	60,206
Short-term borrowings, at fair value	7,406	4,683
Long-term debt, at fair value	68,071	67,063
Other liabilities	2,675	6,835
Fair value | Consumer
Loans, net of unearned income	15	14
Fair value | Corporate
Loans, net of unearned income	$ 7,510	$ 6,840