Collateralized Agreements and Financings - Assets Pledged as Collateral (Detail) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Offsetting Liabilities [Line Items] | ||
| Trading assets (at fair value) | $ 789,083 | $ 656,796 |
| Investments | 255,625 | 194,262 |
| Loans | 260,888 | 237,734 |
| Other assets | 38,740 | 36,212 |
| Pledged to counterparties that had the right to deliver or repledge | Repurchase agreements | ||
| Offsetting Liabilities [Line Items] | ||
| Trading assets (at fair value) | 185,318 | 158,641 |
| Pledged to counterparties that did not have the right to deliver or repledge | Repurchase agreements | ||
| Offsetting Liabilities [Line Items] | ||
| Trading assets (at fair value) | 206,851 | 193,326 |
| Investments | 21,816 | 22,394 |
| Loans | 13,461 | 12,939 |
| Other assets | $ 2,816 | $ 664 |
| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all investments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of assets classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|