Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Trading assets pledged to various parties	$ 104,186	$ 132,578
Investment securities at fair value	102,830	110,383
Securities purchased under agreements to resell at fair value	7	15
Loans held for investment, allowance	654	835
Intangible assets, accumulated amortization	3,819	3,265
Deposits at fair value	1,940	3,521
Securities sold under agreements to repurchase at fair value	791	1,115
Other secured financings at fair value	5,133	11,701
Borrowings at fair value	$ 76,340	$ 73,701
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	3,500,000,000	3,500,000,000
Common stock issued (in shares)	2,038,893,979	2,038,893,979
Common stock outstanding (in shares)	1,772,226,530	1,809,624,144
Treasury stock (in shares)	266,667,449	229,269,835