Debt (Details)	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) lineOfCredit financialInstitution	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Short-term Debt [Line Items]
Proceeds from debt, net		$ 45,000,000
Line of Credit
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 800,000,000
Maximum incremental increase	200,000,000
Amount outstanding	0			$ 0
Proceeds from debt, net	0			$ 0
Line of Credit | Subsidiaries
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 315,000,000
Number of uncommitted lines of credit | lineOfCredit	5
Number of financial institutions offering lines of credit | financialInstitution	5
Number of financial institutions with stated limits | lineOfCredit	4
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)	5.50%		5.20%
Short-term debt, average outstanding amount	$ 455,000,000		$ 267,600,000
Short-term debt	$ 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	$ 500,000			$ 1,100,000
Short-term debt	0			0
EQH
Short-term Debt [Line Items]
Amount outstanding	$ 900,000,000			$ 900,000,000
Weighted average interest rates (as percent)	5.30%			5.30%
Average daily borrowings	$ 771,400,000			$ 743,100,000
Weighted average interest rates on average daily borrowings (as percent)	5.30%			4.90%
EQH | Revolving Credit Facility
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 900,000,000
EQH Uncommitted Facility | Revolving Credit Facility
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	300,000,000
Amount outstanding	$ 0			$ 0