UNPAID CLAIM AND CLAIM EXPENSES - Net Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]
Undiscounted Incurred Claims, net of reinsurance	$ 150	$ 75
Subtract Cumulative LTD Paid Claims, net of reinsurance	(120)	(67)
Liability for unpaid claim and claim expense, net of reinsurance	55	25	$ 17
Reinsurance Recoverable on unpaid claims	23	15	12
Liability for unpaid claim and claim expense	78	40	$ 29
Long-Term Disability
Liability for Claims and Claims Adjustment Expense [Line Items]
Undiscounted Incurred Claims, net of reinsurance	35	22
Subtract Cumulative LTD Paid Claims, net of reinsurance	(12)	(7)
Subtract Impact of LTD Discounting, net of reinsurance	(3)	(2)
Liability for unpaid claim and claim expense, net of reinsurance	20	13
Reinsurance Recoverable on unpaid claims	21	13
Other short-duration contracts
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability for unpaid claim and claim expense, net of reinsurance	35	12
Reinsurance Recoverable on unpaid claims	$ 2	$ 2