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Investment in AB (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in Equity Method Investment
Beginning balance	$ 2,077,540	$ 2,074,626
Equity in net income attributable to AB Unitholders	461,949	299,781	$ 305,504
Changes in accumulated other comprehensive income	620	8,964	(18,303)
Cash distributions received from AB	(377,581)	(329,900)	(394,470)
Capital contributions (from) AB	(770)	(2,164)	0
AB Holding Units retired	(64,487)	(85,300)	(114,794)
AB Holding Units retired for EQH Exchange Agreement	(185,101)	0	0
AB Holding Units issued to fund long-term incentive compensation plans	115,640	104,167	76,230
Change in AB Holding Units held by AB for long-term incentive compensation plans	6,822	7,366
Ending balance	$ 2,034,632	$ 2,077,540	$ 2,074,626

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