REVISION OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Comprehensive Income (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
Statements of Comprehensive Income (Loss):
Net income (loss)			$ (15)	$ (20)			$ (15)	$ (2)	$ (35)	$ (17)					$ (20)	$ (10)
Change in unrealized gains (losses), net of reclassification adjustment	$ (107)	[1]		(150)	$ (5)	[1]	37	(71)		(34)	$ (394)	[1]	$ (39)	[1]	(50)	88
Other comprehensive income (loss)	$ (107)			(150)	$ (5)		37	(71)	(287)	(34)	$ (394)		$ (39)		(50)	88
Comprehensive income (loss)			(152)	(170)			22	(73)	(322)	(51)					(70)	78
As Previously Reported
Statements of Comprehensive Income (Loss):
Net income (loss)			(13)	(19)			(14)	1	(32)	(13)					(13)	(9)
Change in unrealized gains (losses), net of reclassification adjustment				(150)			37	(73)		(36)					(52)	90
Other comprehensive income (loss)				(150)			37	(73)	(287)	(36)					(52)	90
Comprehensive income (loss)			(150)	(169)			23	(72)	(319)	(49)					(65)	81
Impact of Revisions
Statements of Comprehensive Income (Loss):
Net income (loss)			(2)	(1)			(1)	(3)	(3)	(4)					(7)	(1)
Change in unrealized gains (losses), net of reclassification adjustment				0			0	2		2					2	(2)
Other comprehensive income (loss)				0			0	2	0	2					2	(2)
Comprehensive income (loss)			$ (2)	$ (1)			$ (1)	$ (1)	$ (3)	$ (2)					$ (5)	$ (3)

[1] See Note 9 of the Notes to these Financial Statements for details of change in unrealized gains (losses), net of adjustments.