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INVESTMENTS (Narrative) (Details) - USD ($) |  | 9 Months Ended |
--- | --- | --- | ---
Mar. 01, 2021 | Sep. 30, 2021 | Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair value of securities transferred from available for sale to fixed maturities, held to maturity | $ 405,000,000 | $ 405,000,000 |
Debt securities held to maturity |  | 416,879,000 |
Allowance for expected credit losses |  | 0 |
ABS |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Debt securities held to maturity |  | 406,879,000 | $ 0
Allowance for expected credit losses |  | 0 |
Corporate debt |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Debt securities held to maturity |  | 10,000,000 | $ 0
Allowance for expected credit losses |  | $ 0 |
Held-to-maturity securities, maturity term |  | 10 years |

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- Definition Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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