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INVESTMENTS - Summary of Gross Gains (Losses) from Sales of Fixed Maturity and Equity Securities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Proceeds from sales of fixed maturity securities - available for sale | $ 96 | $ 353 | $ 168 | $ 772
Gross gains from dispositions | 7 | 7 | 17 | 28
Gross losses from dispositions | (10) | (23) | (19) | (40)
Proceeds from sales of equity securities |  |  | 46 | 438
Equity securities |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Proceeds from sales of equity securities | 0 | 348 | 46 | 438
Gross gains from dispositions | 0 | 4 | 7 | 8
Gross losses from dispositions | $ 0 | $ (35) | $ 0 | $ (50)

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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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