POLICYHOLDER ACCOUNT BALANCES - Balances and Changes in Separate Accounts Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 5,754
Balance, end of period	6,830
VUL
Separate Account, Liability [Roll Forward]
Balance, beginning of period	2,128	$ 1,653
Premiums and deposits	105	96
Policy charges	(36)	(32)
Surrenders and withdrawals	(13)	(10)
Benefit payments	(5)	(2)
Investment performance	151	98
Net transfers from (to) general account	(13)	(11)
Other charges	0	0
Balance, end of period	2,317	1,792
Cash surrender value	1,982	1,468
GMxB Core
Separate Account, Liability [Roll Forward]
Balance, beginning of period	2,166	756
Premiums and deposits	388	139
Policy charges	(4)	(2)
Surrenders and withdrawals	(17)	(5)
Benefit payments	(2)	(2)
Investment performance	129	38
Net transfers from (to) general account	50	26
Other charges	0	0
Balance, end of period	2,710	950
Cash surrender value	2,522	874
IE
Separate Account, Liability [Roll Forward]
Balance, beginning of period	226	26
Premiums and deposits	245	138
Policy charges	0	0
Surrenders and withdrawals	(4)	0
Benefit payments	0	0
Investment performance	14	1
Net transfers from (to) general account	(162)	(77)
Other charges	0	0
Balance, end of period	319	88
Cash surrender value	305	84
Reinsured
Separate Account, Liability [Roll Forward]
Balance, beginning of period	1,022	913
Premiums and deposits	5	5
Policy charges	(7)	(8)
Surrenders and withdrawals	(22)	(14)
Benefit payments	(4)	(4)
Investment performance	0	74
Net transfers from (to) general account	91	0
Other charges	0	0
Balance, end of period	1,085	966
Cash surrender value	$ 0	$ 0