COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS - Summary of Collateralized Reinsurance Agreements (Details) - Kilimanjaro Re Limited $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Effects of Reinsurance [Line Items]
Limit	$ 1,800
Reinsurance Contract [Axis]: Series 2019-1 Class A-1
Effects of Reinsurance [Line Items]
Limit	150
Reinsurance Contract [Axis]: Series 2019-1 Class A-2
Effects of Reinsurance [Line Items]
Limit	150
Reinsurance Contract [Axis]: Series 2019-1 Class B-1
Effects of Reinsurance [Line Items]
Limit	275
Reinsurance Contract [Axis]: Series 2019-1 Class B-2
Effects of Reinsurance [Line Items]
Limit	275
Reinsurance Contract [Axis]: Series 2021-1 Class A-1
Effects of Reinsurance [Line Items]
Limit	150
Reinsurance Contract [Axis]: Series 2021-1 Class A-2
Effects of Reinsurance [Line Items]
Limit	150
Reinsurance Contract [Axis]: Series 2021-1 Class B-1
Effects of Reinsurance [Line Items]
Limit	85
Reinsurance Contract [Axis]: Series 2021-1 Class B-2
Effects of Reinsurance [Line Items]
Limit	90
Reinsurance Contract [Axis]: Series 2021-1 Class C-1
Effects of Reinsurance [Line Items]
Limit	85
Reinsurance Contract [Axis]: Series 2021-1 Class C-2
Effects of Reinsurance [Line Items]
Limit	90
Reinsurance Contract [Axis]: Series 2022-1 Class A
Effects of Reinsurance [Line Items]
Limit	$ 300