Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Assets
Trading assets pledged	$ 601,993	$ 453,799
Available-for-sale securities, amortized cost, net of allowance for credit losses	206,500	216,188
Available-for-sale securities	197,119	205,857
Loans at fair value	38,808	42,079
Other assets pledged	$ 150,801	$ 182,884
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)	2,740,375	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)	1,213,925,554	1,170,676,094
Assets pledged
Assets
Trading assets pledged	$ 132,750	$ 93,687
Available-for-sale securities	12,548	9,158
Other assets pledged	5,701	7,998
Recurring
Assets
Federal funds sold and securities purchased under resale agreements at fair value	344,193	311,883
Securities borrowed at fair value	68,046	70,041
Trading assets pledged	601,951	453,756
Available-for-sale securities	197,119	205,857
Loans at fair value	38,808	42,079
Liabilities
Deposits at fair value	65,006	28,620
Federal funds purchased and securities loaned or sold under repurchase agreements at fair value	211,571	151,999
Short-term borrowings at fair value	19,289	15,792
Accounts payable and other liabilities at fair value	4,492	7,038
Beneficial interests issued by consolidated VIEs at fair value	66	5
Long-term debt at fair value	78,357	72,281
Recurring | Other assets
Assets
Other assets at fair value	$ 14,168	$ 14,921