COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS - Schedule of Collateralized Reinsurance Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effects of Reinsurance [Line Items]
Limit	$ 1,905	$ 1,645	$ 1,612
Kilimanjaro Re Limited
Effects of Reinsurance [Line Items]
Limit	1,375
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2019-1 Class A-2
Effects of Reinsurance [Line Items]
Limit	150
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2019-1 Class B-2
Effects of Reinsurance [Line Items]
Limit	275
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2021-1 Class A-1
Effects of Reinsurance [Line Items]
Limit	150
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2021-1 Class A-2
Effects of Reinsurance [Line Items]
Limit	150
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2021-1 Class B-1
Effects of Reinsurance [Line Items]
Limit	85
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2021-1 Class B-2
Effects of Reinsurance [Line Items]
Limit	90
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2021-1 Class C-1
Effects of Reinsurance [Line Items]
Limit	85
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2021-1 Class C-2
Effects of Reinsurance [Line Items]
Limit	90
Kilimanjaro Re Limited | Reinsurance Contract [Axis]: Series 2022-1 Class A
Effects of Reinsurance [Line Items]
Limit	$ 300