Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Assets
Trading assets pledged	$ 754,409	$ 540,607
Available-for-sale securities, amortized cost, net of allowance for credit losses	239,813	205,456
Available-for-sale securities	236,152	201,704
Loans at fair value	39,046	38,851
Other assets pledged	$ 162,887	$ 159,308
Stockholders' equity
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	200,000,000	200,000,000
Preferred stock, shares issued (in shares)	2,990,375	2,740,375
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	9,000,000,000	9,000,000,000
Common stock, shares issued (in shares)	4,104,933,895	4,104,933,895
Treasury stock, at cost (in shares)	1,233,266,016	1,228,275,301
Assets pledged
Assets
Trading assets pledged	$ 180,196	$ 128,994
Available-for-sale securities	10,806	9,219
Other assets pledged	9,811	6,764
Recurring
Assets
Federal funds sold and securities purchased under resale agreements at fair value	324,418	259,813
Securities borrowed at fair value	84,258	70,086
Trading assets pledged	754,362	540,565
Available-for-sale securities	236,152	201,704
Loans at fair value	39,046	38,851
Liabilities
Deposits at fair value	80,578	78,384
Federal funds purchased and securities loaned or sold under repurchase agreements at fair value	264,554	169,003
Short-term borrowings at fair value	22,856	20,042
Accounts payable and other liabilities at fair value	8,917	5,637
Beneficial interests issued by consolidated VIEs at fair value	1	1
Long-term debt at fair value	92,730	87,924
Recurring | Other assets
Assets
Other assets at fair value	$ 15,645	$ 12,306