SIGNIFICANT ACCOUNTING POLICIES - Policyholders' Account Balances and Future Policy Benefits and Various Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability For Future Policy Benefits Assumptions [Line Items]
Percentage of life insurance liabilities calculate within traditional life interest rate range (as a percent)	99.50%
Capitalized Computer Software and Hosting Arrangements [Abstract]
Computer software and hosting arrangements	$ 162	$ 133
Amortization of computer software and hosting arrangements	$ 20	$ 46	$ 47
Minimum | Computer Software, Intangible Asset
Capitalized Computer Software and Hosting Arrangements [Abstract]
Intangible asset useful life (in years)	3 years
Maximum | Computer Software, Intangible Asset
Capitalized Computer Software and Hosting Arrangements [Abstract]
Intangible asset useful life (in years)	5 years
Life Insurance Liabilities | Minimum
Liability For Future Policy Benefits Assumptions [Line Items]
Liability for future policy benefits, interest rate (as a percent)	3.50%
Life Insurance Liabilities | Maximum
Liability For Future Policy Benefits Assumptions [Line Items]
Liability for future policy benefits, interest rate (as a percent)	6.30%
Life Insurance Liabilities | Weighted Average
Liability For Future Policy Benefits Assumptions [Line Items]
Liability for future policy benefits, interest rate (as a percent)	5.00%
Annuity Liabilities | Minimum
Liability For Future Policy Benefits Assumptions [Line Items]
Liability for policyholder contract deposits, interest rate (as a percent)	1.50%
Annuity Liabilities | Maximum
Liability For Future Policy Benefits Assumptions [Line Items]
Liability for policyholder contract deposits, interest rate (as a percent)	5.40%
Annuity Liabilities | Weighted Average
Liability For Future Policy Benefits Assumptions [Line Items]
Liability for policyholder contract deposits, interest rate (as a percent)	3.60%