Related Party Transactions - Schedule of Revenues, Expenses and Balance Sheet Items for EQH and Subsidiaries (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Other revenues	$ 101,342	$ 105,544	$ 108,409
Total revenues	4,262,864	4,120,728	4,445,288
Expenses:
General and administrative	581,571	641,635	555,608
Other	215,643	215,556	197,486
Total expenses	3,337,653	3,239,194	3,225,140
Balance Sheet:
Institutional investment advisory and services fees receivable	125,500	127,040
Other due to EQH and its subsidiaries	216,213	179,568
Equitable Holdings, Inc. And Subsidiaries
Revenues:
Other revenues	617	688	675
Total revenues	166,365	149,065	133,749
Expenses:
General and administrative	2,909	2,882	2,373
Other	40,253	14,069	3,953
Total expenses	46,654	20,848	10,876
Balance Sheet:
Institutional investment advisory and services fees receivable	9,055	7,732
Prepaid expenses	709	385
Other due to EQH and its subsidiaries	4,719
Other due to EQH and its subsidiaries		(4,206)
EQH Facility	(900,000)	(990,000)
Total	(885,517)	(986,089)
Investment advisory and services fees
Revenues:
Investment advisory and services fees	2,975,468	2,971,038	3,194,524
Investment advisory and services fees | Equitable Holdings, Inc. And Subsidiaries
Revenues:
Investment advisory and services fees	165,748	148,377	133,074
Distribution related
Revenues:
Investment advisory and services fees	586,263	607,195	652,240
Expenses:
Commissions and distribution payments to financial intermediaries	610,368	629,572	708,117
Distribution related | Equitable Holdings, Inc. And Subsidiaries
Expenses:
Commissions and distribution payments to financial intermediaries	$ 3,492	$ 3,897	$ 4,550