SEGMENT INFORMATION - Schedule of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended					6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023
REVENUES
Premiums	$ 7			$ 3	$ 8	$ 14
Policy charges and fee income	115			130	97	232
Net investment income	78			97	99	154
Asset management and service fees	23			22	20	45
Other income	3			1		4
Investment gains (losses), net	(287)			(1,298)	481	(122)
TOTAL REVENUES	(61)			(1,045)	686	327
BENEFITS AND EXPENSES
Policyholder benefits and changes in fair value of insurance liabilities	(255)			(870)		85
Commission expense	23			18	35	46
General, administrative and other expenses	16			38	3	34
TOTAL BENEFITS AND EXPENSES	(216)			(814)	253	165
INCOME (LOSS) FROM OPERATIONS BEFORE INCOME TAXES	155			(231)	433	162
Income tax expense (benefit)	25			(51)	77	25
NET INCOME (LOSS)	130			(180)	356	137
Other comprehensive income (loss), before tax:
Changes in own-credit risk related to insurance liabilities	(115)			245	0	(93)
Less: Income tax expense	(25)		$ 51	51	(118)	(20)
Other comprehensive income (loss), net of tax	(90)	$ 17	$ 194	194	(443)	(73)
COMPREHENSIVE INCOME (LOSS)	40			14	$ (87)	64
Retained Business
REVENUES
Premiums	7			3		14
Policy charges and fee income	115			130		232
Net investment income	58			35		114
Asset management and service fees	23			22		45
Other income	2			0		3
Investment gains (losses), net	(402)			(108)		(372)
TOTAL REVENUES	(197)			82		36
BENEFITS AND EXPENSES
Policyholder benefits and changes in fair value of insurance liabilities	(391)			257		(206)
Commission expense	23			18		46
General, administrative and other expenses	16			38		34
TOTAL BENEFITS AND EXPENSES	(352)			313		(126)
INCOME (LOSS) FROM OPERATIONS BEFORE INCOME TAXES	155			(231)		162
Income tax expense (benefit)	25			(51)		25
NET INCOME (LOSS)	130			(180)		137
Other comprehensive income (loss), before tax:
Changes in own-credit risk related to insurance liabilities	(115)			245		(93)
Less: Income tax expense	(25)			51		(20)
Other comprehensive income (loss), net of tax	(90)			194		(73)
COMPREHENSIVE INCOME (LOSS)	40			14		64
Ceded Business
REVENUES
Premiums	0			0		0
Policy charges and fee income	0			0		0
Net investment income	20			62		40
Asset management and service fees	0			0		0
Other income	1			1		1
Investment gains (losses), net	115			(1,190)		250
TOTAL REVENUES	136			(1,127)		291
BENEFITS AND EXPENSES
Policyholder benefits and changes in fair value of insurance liabilities	136			(1,127)		291
Commission expense	0			0		0
General, administrative and other expenses	0			0		0
TOTAL BENEFITS AND EXPENSES	136			(1,127)		291
INCOME (LOSS) FROM OPERATIONS BEFORE INCOME TAXES	0			0		0
Income tax expense (benefit)	0			0		0
NET INCOME (LOSS)	0			0		0
Other comprehensive income (loss), before tax:
Changes in own-credit risk related to insurance liabilities	0			0		0
Less: Income tax expense	0			0		0
Other comprehensive income (loss), net of tax	0			0		0
COMPREHENSIVE INCOME (LOSS)	$ 0			$ 0		$ 0