Regulatory Requirements - U.S. Broker-Dealer Regulatory Capital Requirements (Details) - MS&Co. - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Regulatory Requirements | ||
| Net capital | $ 19,088 | $ 19,272 |
| Excess net capital | $ 13,283 | $ 13,905 |
| X | ||||||||||
- Definition The amount by which actual net capital exceeds (does not exceed) the greater required net capital under Securities and Exchange Commission and CFTC regulations. No definition available.
|
| X | ||||||||||
- Definition Amount of net capital of broker-dealer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| 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 | ||||||||||
- Details
|