Subsequent Events - Summary of Ownership Structure of Alliance Bernstein (Details) - AB - Subsequent Event	Jul. 10, 2025
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (as a percent)	100.00%
EQH and its subsidiaries
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (as a percent)	68.50%
AB Holding
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (as a percent)	30.80%
Unaffiliated holders
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (as a percent)	0.70%

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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