INVESTMENTS - Accrued Investment Income (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Net Investment Income [Line Items]
Total accrued investment income	$ 69	$ 61
Fixed maturity securities
Net Investment Income [Line Items]
Total accrued investment income	60	58
Commercial mortgage and other loans
Net Investment Income [Line Items]
Total accrued investment income	0	3
Secured receivable
Net Investment Income [Line Items]
Total accrued investment income	3	0
Other invested assets
Net Investment Income [Line Items]
Total accrued investment income	3	0
Short-term investments and cash equivalents
Net Investment Income [Line Items]
Total accrued investment income	$ 3	$ 0