INSURANCE LIABILITIES - Variable Annuity Contracts with GMDB and GMIB Features (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
GMDB Ceded
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 16,479
Separate Accounts	107,305	$ 100,520
Total Account Values	123,784
NAR, gross	17,184
NAR, net of amounts reinsured	$ 8,997
Percentage of policyholders over age 70	20.70%
GMDB Ceded | Return of Premium
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 16,188
Separate Accounts	59,603
Total Account Values	75,791
NAR, gross	90
NAR, net of amounts reinsured	$ 86
Percentage of policyholders over age 70	11.70%
GMDB Ceded | Ratchet
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 84
Separate Accounts	9,804
Total Account Values	9,888
NAR, gross	29
NAR, net of amounts reinsured	$ 26
Percentage of policyholders over age 70	51.30%
GMDB Ceded | Roll-Up
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 51
Separate Accounts	3,412
Total Account Values	3,463
NAR, gross	1,333
NAR, net of amounts reinsured	$ 937
Percentage of policyholders over age 70	72.60%
GMDB Ceded | Combo
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 156
Separate Accounts	34,486
Total Account Values	34,642
NAR, gross	15,732
NAR, net of amounts reinsured	$ 7,948
Percentage of policyholders over age 70	57.50%
GMIB
Net Amount at Risk by Product and Guarantee [Line Items]
Separate Accounts	$ 63,006	$ 61,186
Immediate Variable Annuity | GMDB Ceded
Net Amount at Risk by Product and Guarantee [Line Items]
Average attained age of policyholders (in years)	55 years 7 months 6 days
Immediate Variable Annuity | GMDB Ceded | Minimum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	3.00%
Immediate Variable Annuity | GMDB Ceded | Maximum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	6.50%
Immediate Variable Annuity | GMDB Ceded | Return of Premium
Net Amount at Risk by Product and Guarantee [Line Items]
Average attained age of policyholders (in years)	51 years 6 months
Immediate Variable Annuity | GMDB Ceded | Ratchet
Net Amount at Risk by Product and Guarantee [Line Items]
Average attained age of policyholders (in years)	69 years 1 month 6 days
Immediate Variable Annuity | GMDB Ceded | Roll-Up
Net Amount at Risk by Product and Guarantee [Line Items]
Average attained age of policyholders (in years)	75 years 6 months
Immediate Variable Annuity | GMDB Ceded | Roll-Up | Minimum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	3.00%
Immediate Variable Annuity | GMDB Ceded | Roll-Up | Maximum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	6.00%
Immediate Variable Annuity | GMDB Ceded | Combo
Net Amount at Risk by Product and Guarantee [Line Items]
Average attained age of policyholders (in years)	71 years 1 month 6 days
Immediate Variable Annuity | GMDB Ceded | Combo | Minimum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	3.00%
Immediate Variable Annuity | GMDB Ceded | Combo | Maximum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	6.50%
Immediate Variable Annuity | GMIB
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 218
Separate Accounts	63,006
Total Account Values	63,224
NAR, gross	9,725
NAR, net of amounts reinsured	$ 3,910
Average attained age of policyholders (in years)	68 years 8 months 12 days
Weighted average years remaining until annuitization (in years)	2 years 7 months 6 days
Immediate Variable Annuity | GMIB | Minimum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	3.00%
Immediate Variable Annuity | GMIB | Maximum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	6.50%
Immediate Variable Annuity | GMIB | Return of Premium
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 0
Separate Accounts	0
Total Account Values	0
NAR, gross	0
NAR, net of amounts reinsured	0
Immediate Variable Annuity | GMIB | Ratchet
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	0
Separate Accounts	0
Total Account Values	0
NAR, gross	0
NAR, net of amounts reinsured	0
Immediate Variable Annuity | GMIB | Roll-Up
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	16
Separate Accounts	26,173
Total Account Values	26,189
NAR, gross	632
NAR, net of amounts reinsured	$ 202
Average attained age of policyholders (in years)	65 years
Weighted average years remaining until annuitization (in years)	6 years
Immediate Variable Annuity | GMIB | Roll-Up | Minimum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	3.00%
Immediate Variable Annuity | GMIB | Roll-Up | Maximum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	6.00%
Immediate Variable Annuity | GMIB | Combo
Net Amount at Risk by Product and Guarantee [Line Items]
General Account	$ 202
Separate Accounts	36,833
Total Account Values	37,035
NAR, gross	9,093
NAR, net of amounts reinsured	$ 3,708
Average attained age of policyholders (in years)	70 years 9 months 18 days
Weighted average years remaining until annuitization (in years)	7 months 6 days
Immediate Variable Annuity | GMIB | Combo | Minimum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	3.00%
Immediate Variable Annuity | GMIB | Combo | Maximum
Net Amount at Risk by Product and Guarantee [Line Items]
Range of contractually specified interest rates (as a percent)	6.50%