Business Description, Organization and Basis of Presentation (Details) - shares	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Ownership structure of AB Holding
Units outstanding (in shares)	100,000	100,000
AB Holding | EQH
Ownership structure of AB Holding
General partnership interest (percent)	4.00%
AB Holding | AllianceBernstein Corporation
Ownership structure of AB Holding
General partnership interest (percent)	1.00%
Units outstanding (in shares)	100,000
AB | EQH and its subsidiaries
Ownership structure of AB Holding
General partnership interest (percent)	64.50%