Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Assets
Trading assets pledged	$ 952,777	$ 637,784
Available-for-sale securities, amortized cost, net of allowance for credit losses	492,300	411,045
Available-for-sale securities	490,499	406,852
Loans at fair value	54,686	41,350
Other assets pledged	$ 194,972	$ 178,197
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)	2,005,375	2,005,375
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)	1,382,671,600	1,307,313,494
Assets pledged
Assets
Trading assets pledged	$ 242,201	$ 136,070
Available-for-sale securities	7,238	10,162
Other assets pledged	6,472	6,288
Recurring
Assets
Federal funds sold and securities purchased under resale agreements at fair value	404,609	286,771
Securities borrowed at fair value	104,757	83,962
Trading assets pledged	952,777	637,784
Available-for-sale securities	490,499	406,852
Loans at fair value	54,686	41,350
Liabilities
Deposits at fair value	36,018	33,768
Federal funds purchased and securities loaned or sold under repurchase agreements at fair value	489,189	226,329
Short-term borrowings at fair value	36,638	26,521
Accounts payable and other liabilities at fair value	8,157	5,893
Beneficial interests issued by consolidated VIEs at fair value	8	1
Long-term debt at fair value	124,178	100,780
Recurring | Other assets
Assets
Other assets at fair value	$ 17,141	$ 15,122