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INCOME TAXES - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Contingency [Line Items] |  |  |
Deferred income tax benefits | $ 578,000,000 |  |
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 | 15,000,000 | 25,000,000 |
Foreign tax credits | 0 | 3,000,000 |
Unrealized losses on available for sale fixed maturity securities | 67,000,000 | 218,000,000 |
Tax benefits related to restricted stock vestings and stock options exercises | 2,000,000 | 2,000,000 | 2,000,000
Tax benefits related to payment of dividends on restricted stock | 600,000 | $ 600,000 | $ 600,000
Her Majesty's Revenue and Customs (HMRC) |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | 7,000,000 |  |
Revenue Commissioners, Ireland |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | 2,000,000 |  |
Swiss Federal Tax Administration (FTA) |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | 2,000,000 |  |
Internal Revenue Service (IRS) |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | 7,000,000 |  |
Non-U.S. |  |  |
Income Tax Contingency [Line Items] |  |  |
Increase (decrease) in valuation allowance | 10,000,000 |  |
Tax Year 2015 |  |  |
Income Tax Contingency [Line Items] |  |  |
Net refund | 2,000,000 |  |
Tax Year 2016 |  |  |
Income Tax Contingency [Line Items] |  |  |
Net refund | $ 5,000,000 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-8 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
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