LIABILITIES FOR FUTURE POLICYHOLDER BENEFITS - Balances of and Changes in Additional Liabilities Related to Insurance Guarantees (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance, end of the period	$ 0	$ 0
Net liability for additional liability	$ 707		$ 669
Weighted Average Interest Rate	5.50%	5.50%
Assessments
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue and Interest Accretion	$ 5	$ 4
Interest Accretion
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue and Interest Accretion	0	$ 1
Universal Life
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Net liability for additional liability	$ 62		58
Weighted Average Interest Rate	5.50%	5.50%
Universal Life | Assessments
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue and Interest Accretion	$ 5	$ 4
Universal Life | Interest Accretion
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue and Interest Accretion	0	1
Universal Life | Life Insurance & Employee Benefits Products
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance, beginning of the period	58	57
Beginning balance before AOCI adjustments	66	55
Effect of changes in interest rate and cash flow assumptions and model changes			0	$ 0
Effect of actual variances from expected experience			(1)	(1)
Adjusted beginning of period balance			$ 65	$ 54
Interest accrual	1	1
Net assessments collected	2	2
Benefit payments	0	0
Ending balance before shadow reserve adjustments	68	57
Effect of shadow reserve adjustment	(6)	(2)
Balance, end of the period	62	55
Net liability for additional liability	62	55
Effect of reserve adjustment recorded in AOCI	0	0
Net liability for additional liability, after reinsurance recoverable	$ 62	$ 55
Weighted-average duration of additional liability - death benefit (years)	32 years 3 months 18 days	33 years 10 months 24 days