SIGNIFICANT ACCOUNTING POLICIES - Assumption Updates and Model Changes (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in Accounting Estimate [Line Items]
Policy charges and fee income	$ 72			$ 68					$ 218	$ 212
Policyholders’ benefits	59			65					215	174		$ 184	$ 106
Net derivative gains (losses)	(12)			0					(12)	(3)
Income (loss) from operations, before income taxes	8	$ (13)	$ (23)	(2)	$ (19)	$ (2)	$ (36)	$ (21)	(28)	(23)	$ (27)	(39)	(58)
Net income (loss)	11	$ (15)	$ (20)	(1)	$ (15)	$ (2)	$ (35)	$ (17)	(24)	(17)	$ (20)	$ (10)	$ (45)
Assumptions Updates
Change in Accounting Estimate [Line Items]
Policy charges and fee income	(7)			2					(7)	2
Policyholders’ benefits	10			(10)					10	(10)
Amortization of deferred policy acquisition costs, net	14			(4)					14	(4)
Income (loss) from operations, before income taxes	17			(12)					17	(12)
Net income (loss)	$ 13			(9)					$ 13	$ (9)
Model Changes
Change in Accounting Estimate [Line Items]
Income (loss) from operations, before income taxes				21
Net income (loss)				$ 17