CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Federal funds sold and securities borrowed or purchased under agreements to resell, at fair value	$ 257,887	$ 232,478
Trading account assets, pledged to creditors	107,399	99,460
Available-for-sale securities, pledged to creditors	14,312	9,493
Held-to-maturity securities, pledged to creditors	1,063	435
Equity securities, available for sale		189
Loans, net of unearned income	672,938	667,034
Other assets, at fair value	105,882	103,926
Interest-bearing deposits in U.S. offices	327,872	318,613
Interest-bearing deposits in offices outside the U.S.	457,538	426,889
Federal funds purchased and securities loaned or sold under agreements to repurchase, at fair value	171,759	156,277
Short-term borrowings, at fair value	36,094	44,452
Long-term debt, at fair value	237,938	236,709
Other liabilities	$ 58,582	$ 57,021
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)	766,250	770,120
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)	3,099,557,871	3,099,523,273
Treasury stock (in shares)	549,624,378	529,614,728
Consumer
Loans, net of unearned income	$ 325,084	$ 333,656
Corporate
Loans, net of unearned income	347,854	333,378
Fair value
Federal funds sold and securities borrowed or purchased under agreements to resell, at fair value	161,537	132,949
Non-marketable equity securities, pledged to creditors	1,569	1,395
Other assets, at fair value	20,443	18,559
Interest-bearing deposits in U.S. offices	300	303
Interest-bearing deposits in offices outside the U.S.	1,386	1,162
Federal funds purchased and securities loaned or sold under agreements to repurchase, at fair value	45,840	40,638
Short-term borrowings, at fair value	4,467	4,627
Long-term debt, at fair value	33,571	31,392
Other liabilities	15,552	13,961
Fair value | Consumer
Loans, net of unearned income	23	25
Fair value | Corporate
Loans, net of unearned income	$ 4,513	$ 4,349