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INCOME TAXES - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Taxes [Line Items] |  |  |
Accrual withholding taxes, percent | 5.00% |  |
Increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions | $ 0 | $ 0 | $ 0
Deferred tax assets, valuation allowance | 25,000,000 | 15,000,000 |
Foreign tax credits | 16,000,000 | 0 |
Unrealized losses on available for sale fixed maturity securities | 138,000,000 | 67,000,000 |
Tax benefits related to restricted stock vestings and stock options exercises | 1,000,000 | 2,000,000 | 2,000,000
Tax benefits related to payment of dividends on restricted stock | 700,000 | $ 600,000 | $ 600,000
His Majesty's Revenue and Customs (HMRC) |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards, not subject to expiration | 11,000,000 |  |
Revenue Commissioners, Ireland |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards, not subject to expiration | 4,000,000 |  |
Spanish Federal Tax Administration (FTA) |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards, not subject to expiration | 2,000,000 |  |
Internal Revenue Service (IRS) |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards, not subject to expiration | 8,000,000 |  |
Non-U.S. |  |  |
Income Taxes [Line Items] |  |  |
Increase (decrease) in valuation allowance | 10,000,000 |  |
Foreign tax credits | 7,000,000 |  |
U.S. |  |  |
Income Taxes [Line Items] |  |  |
Foreign tax credits | $ 9,000,000 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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