Business Description, Organization and Basis of Presentation - Summary of Ownership Structure (Details) - AB |
9 Months Ended |
|---|---|
Sep. 30, 2026 | |
| Distribution Made to Limited Partner [Line Items] | |
| Limited partners or members ownership interest in company | 100.00% |
| EQH and its subsidiaries | |
| Distribution Made to Limited Partner [Line Items] | |
| Limited partners or members ownership interest in company | 68.30% |
| AB Holding | |
| Distribution Made to Limited Partner [Line Items] | |
| Limited partners or members ownership interest in company | 31.10% |
| Unaffiliated holders | |
| Distribution Made to Limited Partner [Line Items] | |
| Limited partners or members ownership interest in company | 0.60% |