INCOME TAXES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Valuation allowance movement [Line Items]
Bermuda economic transition adjustment	$ 176,923,000	$ 0
Increase in (release of) valuation allowance	(19,000,000)	(21,000,000)
Unrecognized tax benefits	0	0
Ireland
Valuation allowance movement [Line Items]
Increase in (release of) valuation allowance	(13,000,000)	(25,000,000)
Ireland | Foreign Tax Credits
Valuation allowance movement [Line Items]
Increase in (release of) valuation allowance	(7,000,000)	6,000,000
U.S.
Valuation allowance movement [Line Items]
Deferred tax assets for unrealized losses on fixed maturity securities	19,000,000	41,000,000
U.S. | Foreign Tax Credits
Valuation allowance movement [Line Items]
Increase in (release of) valuation allowance		(2,000,000)
Office of the Tax Commissioner, Bermuda
Valuation allowance movement [Line Items]
Deferred tax assets for unrealized losses on fixed maturity securities	17,000,000	13,000,000
Other Comprehensive Income | Ireland
Valuation allowance movement [Line Items]
Increase in (release of) valuation allowance	(5,000,000)	(13,000,000)
Net income (loss) | Ireland
Valuation allowance movement [Line Items]
Increase in (release of) valuation allowance	$ (8,000,000)	$ (12,000,000)