POLICYHOLDER ACCOUNT BALANCES - Balances and Changes in Policyholders’ Account Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	$ 3,751
Interest credited (3)	23	$ 19
Balance, end of the period	4,910
Universal Life
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	1,962	1,973
Issuances	0	0
Premiums received	58	66
Policy charges	(44)	(44)
Surrenders and withdrawals	(7)	(6)
Benefit payments	(3)	(3)
Net transfers from (to) separate account	0	0
Interest credited (3)	30	2
Other	0	0
Balance, end of the period	$ 1,996	$ 1,988
Weighted-average crediting rate (years)	2.23%	2.19%
Net amount at risk (4)	$ 18,004	$ 18,296
Cash surrender value	1,505	1,452
VUL
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	655
Net transfers from (to) separate account	11	(109)
Balance, end of the period	669
VUL | Life Insurance & Employee Benefits Products
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	655	614
Issuances	0	0
Premiums received	5	4
Policy charges	(9)	(2)
Surrenders and withdrawals	0	0
Benefit payments	(2)	(1)
Net transfers from (to) separate account	11	9
Interest credited (3)	9	5
Other	0	0
Balance, end of the period	$ 669	$ 629
Weighted-average crediting rate (years)	3.52%	3.53%
Net amount at risk (4)	$ 30,589	$ 27,994
Cash surrender value	535	511
GMxB Core
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	27
Balance, end of the period	28
GMxB Core | Individual Variable Annuity Products
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	27	13
Issuances	0	0
Premiums received	29	4
Policy charges	(2)	(1)
Surrenders and withdrawals	0	0
Benefit payments	0	0
Net transfers from (to) separate account	(26)	0
Interest credited (3)	0	0
Other	0	0
Balance, end of the period	$ 28	$ 16
Weighted-average crediting rate (years)	1.00%	1.00%
Net amount at risk (4)	$ 9	$ 2
Cash surrender value	32	18
Investment Edge
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	7
Net transfers from (to) separate account	77	0
Balance, end of the period	85
Investment Edge | Individual Variable Annuity Products
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	7	0
Issuances	0	0
Premiums received	0	0
Policy charges	0	0
Surrenders and withdrawals	0	0
Benefit payments	0	0
Net transfers from (to) separate account	77	0
Interest credited (3)	1	0
Other	0	0
Balance, end of the period	$ 85	$ 0
Weighted-average crediting rate (years)	1.00%	0.00%
Net amount at risk (4)	$ 0	$ 0
Cash surrender value	81	0
SCS
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	242
Balance, end of the period	1,296
SCS | Employer - Sponsored Products
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	242	0
Issuances	0	0
Premiums received	0	0
Policy charges	0	0
Surrenders and withdrawals	(1)	0
Benefit payments	0	0
Net transfers from (to) separate account	1,031	0
Interest credited (3)	24	0
Other	0	0
Balance, end of the period	$ 1,296
Weighted-average crediting rate (years)	1.00%	0.00%
Net amount at risk (4)	$ 0	$ 0
Cash surrender value	1,208	0
Reinsured
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	819
Net transfers from (to) separate account	0	(2)
Balance, end of the period	800
Reinsured | Employer - Sponsored Products
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	819	867
Issuances	0	0
Premiums received	6	8
Policy charges	(9)	(8)
Surrenders and withdrawals	(23)	(22)
Benefit payments	(2)	(1)
Net transfers from (to) separate account	0	2
Interest credited (3)	8	9
Other	1	0
Balance, end of the period	$ 800	$ 855
Weighted-average crediting rate (years)	4.12%	4.31%
Net amount at risk (4)	$ 4,011	$ 4,279
Cash surrender value	799	$ 855
Others
Policyholder Account Balance [Roll Forward]
Balance, beginning of the period	39
Balance, end of the period	$ 36