INVESTMENTS - PREDECESSOR COMPANY - Accrued Investment Income (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Net Investment Income [Line Items]
Total accrued investment income	$ 52	$ 61
Fixed maturity securities
Net Investment Income [Line Items]
Total accrued investment income	47	58
Equity securities
Net Investment Income [Line Items]
Total accrued investment income		0
Commercial mortgage and other loans
Net Investment Income [Line Items]
Total accrued investment income		3
Secured Receivable
Net Investment Income [Line Items]
Total accrued investment income
Other invested assets
Net Investment Income [Line Items]
Total accrued investment income	1	0
Short-term investments and cash equivalents
Net Investment Income [Line Items]
Total accrued investment income	$ 4	$ 0