Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
COMPREHENSIVE INCOME (LOSS)
Net income (loss)		$ (13)	$ (9)	$ (45)
Other comprehensive income (loss), net of income taxes:
Change in unrealized gains (losses), net of adjustment	[1]	(52)	90	60
Other comprehensive income (loss), net of income taxes		(52)	90	60
Comprehensive income (loss)		$ (65)	$ 81	$ 15

[1] See Note 12 of the Notes to these Financial Statements for details of change in unrealized gains (losses), net of adjustments.