REVENUES FROM EXTERNAL CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total Revenues	$ 4,889	$ 7,791	$ 5,174
Individual Variable Annuity Products
Disaggregation of Revenue [Line Items]
Total Revenues	2,562	2,728	2,810
Individual Variable Annuity Products | Premiums
Disaggregation of Revenue [Line Items]
Total Revenues	126	165	179
Individual Variable Annuity Products | Fees
Disaggregation of Revenue [Line Items]
Total Revenues	2,364	2,555	2,615
Amortization/capitalization of unearned revenue liability	(13)	(14)	(35)
Individual Variable Annuity Products | Others
Disaggregation of Revenue [Line Items]
Total Revenues	72	8	16
Employer- Sponsored
Disaggregation of Revenue [Line Items]
Total Revenues	616	504	481
Employer- Sponsored | Premiums
Disaggregation of Revenue [Line Items]
Total Revenues	0	0	0
Employer- Sponsored | Fees
Disaggregation of Revenue [Line Items]
Total Revenues	611	500	477
Employer- Sponsored | Others
Disaggregation of Revenue [Line Items]
Total Revenues	5	4	4
Life Insurance Products
Disaggregation of Revenue [Line Items]
Total Revenues	1,990	2,031	2,163
Life Insurance Products | Premiums
Disaggregation of Revenue [Line Items]
Total Revenues	566	587	702
Life Insurance Products | Fees
Disaggregation of Revenue [Line Items]
Total Revenues	1,417	1,421	1,440
Life Insurance Products | Others
Disaggregation of Revenue [Line Items]
Total Revenues	7	23	21
Employee Benefit Products
Disaggregation of Revenue [Line Items]
Total Revenues	40	51	48
Employee Benefit Products | Premiums
Disaggregation of Revenue [Line Items]
Total Revenues	40	36	35
Employee Benefit Products | Fees
Disaggregation of Revenue [Line Items]
Total Revenues	0	0	0
Employee Benefit Products | Others
Disaggregation of Revenue [Line Items]
Total Revenues	0	15	13
Other
Disaggregation of Revenue [Line Items]
Total Revenues	44	38	34
Other | Premiums
Disaggregation of Revenue [Line Items]
Total Revenues	18	18	20
Other | Fees
Disaggregation of Revenue [Line Items]
Total Revenues	16	13	12
Other | Others
Disaggregation of Revenue [Line Items]
Total Revenues	$ 10	$ 7	$ 2