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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)

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