POLICYHOLDER ACCOUNT BALANCES - Balances and Changes in Policyholders' Account Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Policyholder Account Balance [Roll Forward]
Interest credited	$ 298	$ 435
Universal Life
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	5,202
Balance, end of period	5,163
Universal Life | Protection Solutions
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	5,202	5,341
Issuances	0	0
Premiums received	166	183
Policy charges	(182)	(194)
Surrenders and withdrawals	(20)	(18)
Benefit payments	(58)	(76)
Net transfers from (to) separate account	0	0
Interest credited	55	55
Other	0	0
Balance, end of period	$ 5,163	$ 5,291
Weighted-average crediting rate	3.79%	3.64%
Net amount at risk	$ 34,991	$ 37,031
Cash surrender value	3,405	3,475
Variable Universal Life
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	4,145
Balance, end of period	4,156
Variable Universal Life | Protection Solutions
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	4,145	4,253
Issuances	0	0
Premiums received	22	33
Policy charges	(54)	(55)
Surrenders and withdrawals	(20)	(1)
Benefit payments	(18)	(38)
Net transfers from (to) separate account	35	(57)
Interest credited	46	46
Other	0	0
Balance, end of period	$ 4,156	$ 4,181
Weighted-average crediting rate	3.76%	3.86%
Net amount at risk	$ 82,513	$ 83,830
Cash surrender value	2,633	2,758
GMxB Legacy
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	618
Balance, end of period	617
GMxB Legacy | Legacy Segment
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	618	688
Issuances	0	0
Premiums received	19	20
Policy charges	19	19
Surrenders and withdrawals	(22)	(25)
Benefit payments	(24)	(24)
Net transfers from (to) separate account	1	0
Interest credited	6	7
Other	0	0
Balance, end of period	$ 617	$ 685
Weighted-average crediting rate	2.71%	1.78%
Net amount at risk	$ 19,673	$ 21,472
Cash surrender value	550	957
GMxB Core | Individual Retirement
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	(5)	42
Issuances	0	0
Premiums received	10	16
Policy charges	(2)	(3)
Surrenders and withdrawals	(8)	(8)
Benefit payments	0	(1)
Net transfers from (to) separate account	(8)	(22)
Interest credited	1	1
Other	0	0
Balance, end of period	$ (12)	$ 25
Weighted-average crediting rate	1.36%	1.05%
Net amount at risk	$ 2,762	$ 3,278
Cash surrender value	210	252
SCS
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	40,649
Balance, end of period	42,782
SCS | Individual Retirement
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	40,649	35,460
Issuances	0	0
Premiums received	3	0
Policy charges	(2)	(1)
Surrenders and withdrawals	(922)	(606)
Benefit payments	(65)	(59)
Net transfers from (to) separate account	541	950
Interest credited	2,578	1,597
Other	0	0
Balance, end of period	42,782	$ 37,341
Weighted-average crediting rate		1.12%
Net amount at risk	0	$ 42
Cash surrender value	39,762	34,078
EQUI-VEST Individual
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	2,322
Balance, end of period	2,241
EQUI-VEST Individual | Individual Retirement
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	2,322	2,652
Issuances	0	0
Premiums received	7	11
Policy charges	0	0
Surrenders and withdrawals	(91)	(94)
Benefit payments	(15)	(20)
Net transfers from (to) separate account	2	3
Interest credited	16	19
Other	0	3
Balance, end of period	$ 2,241	$ 2,574
Weighted-average crediting rate	2.98%	3.09%
Net amount at risk	$ 104	$ 128
Cash surrender value	2,235	2,567
EQUI-VEST Group
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	11,563
Balance, end of period	11,430
EQUI-VEST Group | Group Retirement
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	11,563	12,046
Issuances	0	0
Premiums received	151	148
Policy charges	(1)	(1)
Surrenders and withdrawals	(443)	(406)
Benefit payments	(17)	(17)
Net transfers from (to) separate account	81	69
Interest credited	96	102
Other	0	11
Balance, end of period	$ 11,430	$ 11,952
Weighted-average crediting rate	2.65%	2.99%
Net amount at risk	$ 6	$ 58
Cash surrender value	11,368	11,871
Momentum
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	608
Balance, end of period	590
Momentum | Group Retirement
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	608	703
Issuances	0	0
Premiums received	18	19
Policy charges	0	0
Surrenders and withdrawals	(30)	(30)
Benefit payments	(1)	(2)
Net transfers from (to) separate account	(8)	(9)
Interest credited	3	3
Other	0	0
Balance, end of period	$ 590	$ 684
Weighted-average crediting rate	2.33%	2.03%
Net amount at risk	$ 0	$ 0
Cash surrender value	$ 591	$ 684