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INVESTMENTS - Schedule of Proceeds and Split Between Gross Gains and Losses, from Sales of Fixed Maturity Securities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |  |  |
Proceeds from sales of fixed maturity securities - available for sale | $ 3,849 | $ 1,403 | $ 1,916
Gross gains from sales | 35 | 40 | 72
Gross losses from sales | (327) | (127) | (55)
Proceeds from sales of equity securities | 126 | 2,217 | 990
Gross gains from sales | 8 | 165 | 42
Gross losses from sales | $ 0 | $ (53) | $ (15)

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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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