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v3.25.1

Business Description, Organization and Basis of Presentation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 03, 2025 | Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Ownership structure of AB Holding |  |  |  |
Units outstanding (in shares) |  | 100,000 |  | 100,000
AB Holding units repurchased (in shares) |  | 800,000 | 100,000 |
Aggregate purchase price |  | $ 30.5 | $ 4.3 |
Tender Offer | Subsequent Event |  |  |  |
Ownership structure of AB Holding |  |  |  |
Cash tender offer to purchase up to (in shares) | 46,000,000 |  |  |
Stock repurchased during period (in dollars per share) | $ 38.50 |  |  |
Stock repurchased during period, amount | $ 1,800.0 |  |  |
AB Holding units repurchased (in shares) | 19,682,946 |  |  |
Aggregate purchase price | $ 757.8 |  |  |
AB Holding | Subsequent Event |  |  |  |
Ownership structure of AB Holding |  |  |  |
Economic interest, percentage | 17.90% |  |  |
AB Holding | AllianceBernstein Corporation | General Partnership Interest |  |  |  |
Ownership structure of AB Holding |  |  |  |
Units outstanding (in shares) |  | 100,000 |  |
AB | Subsequent Event |  |  |  |
Ownership structure of AB Holding |  |  |  |
Economic interest, percentage | 68.50% |  |  |
AB | AllianceBernstein Corporation | General and Limited Partnership Interests |  |  |  |
Ownership structure of AB Holding |  |  |  |
General partnership interest (percent) |  | 61.90% |  |
AB | AllianceBernstein Corporation | General Partnership Interest |  |  |  |
Ownership structure of AB Holding |  |  |  |
General partnership interest (percent) |  | 1.00% |  |

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