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Investment in AB (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Change in Equity Method Investment [Roll Forward]
Beginning balance			$ 2,034,632
Equity in net income attributable to AB Unitholders	$ 81,412	$ 136,374	242,995	$ 345,360
Changes in accumulated other comprehensive income	1,049	$ 7,588	23,599	7,121
Cash distributions received from AB			(300,993)	(281,164)
Capital contributions to AB			807
AB Holding Units retired			(43,313)
AB Holding Units issued for long-term incentive compensation plans			48,878
Retirement of AB Holding Units in connection with EQH Amended Exchange Agreement			(820,188)	$ 0
Change in AB Holding Units held by AB for long-term incentive compensation plans			(7,652)
Ending balance	$ 1,178,765		$ 1,178,765

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