Debt (Details)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) lineOfCredit	Sep. 30, 2024 USD ($) lineOfCredit financialInstitution	Dec. 31, 2023 USD ($)
Revolving Credit Facility | Line of Credit | EQH
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 900,000,000	$ 900,000,000
Amount outstanding	500,000,000.0	$ 500,000,000.0	$ 900,000,000.0
Weighted average interest rates (as percent)		4.80%	5.30%
Average daily borrowings		$ 555,300,000	$ 743,100,000
Weighted average interest rates on average daily borrowings (as percent)		5.30%	4.90%
Revolving Credit Facility | EQH Uncommitted Facility
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	300,000,000	$ 300,000,000
Amount outstanding	0	0	$ 0
Line of Credit
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	800,000,000.0	800,000,000.0
Maximum incremental increase	200,000,000	200,000,000
Amount outstanding	0	0	0
Proceeds from debt, net		0	$ 0
Line of Credit | Subsidiaries
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 150,000,000.0	$ 150,000,000.0
Number of uncommitted lines of credit | lineOfCredit	5	3
Number of uncommitted lines of credit, matured | lineOfCredit	2
Number of financial institutions offering lines of credit | financialInstitution		3
Number of financial institutions with stated limits | lineOfCredit		2
Equitable Holdings, Inc. And Subsidiaries
Short-term Debt [Line Items]
Weighted average interest rates on average daily borrowings (as percent)			4.60%
Short-term debt, average outstanding amount		$ 0	$ 3,600,000
Commercial Paper
Short-term Debt [Line Items]
Weighted average interest rates on average daily borrowings (as percent)		5.40%	5.20%
Short-term debt, average outstanding amount		$ 304,400,000	$ 267,600,000
Short-term debt	$ 0	$ 0	$ 254,300,000
Interest rate on commercial paper outstanding (as percent)			5.40%
Uncommited Lines of Credit
Short-term Debt [Line Items]
Weighted average interest rates (as percent)		8.50%	7.80%
Short-term debt, average outstanding amount		$ 900,000	$ 1,100,000
Short-term debt	$ 0	$ 0	$ 0