Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Securities purchased under agreements to resell at fair value	$ 190,446	$ 225,117
Securities borrowed at fair value	36,792	38,578
Customer and other receivables at fair value	23	25
Trading assets, at fair value pledged as collateral	97,406	40,143
Investments at fair value	76,307	78,201
Investment pledged as collateral	8,463	9,818
Loans, allowance	4,895	5,543
Loans at fair value	6,448	7,655
Other assets at fair value	324	145
Deposits at fair value	28,557	15,746
Securities loaned at fair value	8,178	4,372
Other secured financings at fair value	14,114	12,756
Unsecured short-term borrowings at fair value	42,351	39,731
Unsecured long-term borrowings at fair value	73,916	73,147
Other liabilities at fair value	614	159
Preferred stock, liquidation preference	$ 11,203	$ 10,703
Common stock, shares issued (in shares)	922,889,392	917,815,030
Common stock, shares outstanding (in shares)	326,604,718	334,918,639
Stock held in treasury (in shares)	596,284,676	582,896,393