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Business Description, Organization and Basis of Presentation - Limited Partnership Interests in AB Holdings (Details) - AllianceBernstein Corporation | 9 Months Ended
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Sep. 30, 2025
EQH and its subsidiaries |
Distribution Made to Limited Partner [Line Items] |
Limited partners or members ownership interest in company (as a percent) | 68.50%
AB Holding |
Distribution Made to Limited Partner [Line Items] |
Limited partners or members ownership interest in company (as a percent) | 30.80%
Unaffiliated holders |
Distribution Made to Limited Partner [Line Items] |
Limited partners or members ownership interest in company (as a percent) | 0.70%
AB |
Distribution Made to Limited Partner [Line Items] |
Limited partners or members ownership interest in company (as a percent) | 100.00%

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- 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. + References No definition available. + Details
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- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482987/272-10-50-3 + Details
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