COMMITMENTS AND CONTINGENCIES - Cash and Investments (Details) $ in Billions	Dec. 31, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Fixed maturity investment portfolio	$ 12.0
Fixed maturity investment portfolio percentage	44.00%
Fixed maturity portfolio - corporate issuer concentration limit above A-	2.00%
Fixed maturity portfolio - corporate issuer concentration limit below A-	1.00%

Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Name:	us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant