Business Description, Organization and Basis of Presentation - Narrative (Details) - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Distribution Made to Limited Partner [Line Items] | ||
| Units outstanding (in shares) | 100,000 | 100,000 |
| AB Holding | General Partnership Interest | AllianceBernstein Corporation | ||
| Distribution Made to Limited Partner [Line Items] | ||
| Units outstanding (in shares) | 100,000 | |
| AB | ||
| Distribution Made to Limited Partner [Line Items] | ||
| Economic interest (percent) | 68.10% | |
| AB | General Partnership Interest | AllianceBernstein Corporation | ||
| Distribution Made to Limited Partner [Line Items] | ||
| General partnership interest (percent) | 1.00% |