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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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-Subparagraph (a)
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