Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2018	$ 331	$ 3	$ 333	$ 7	$ (12)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(45)			(45)
Capital contribution from parent	70		70
Other comprehensive income (loss)	60				60
Ending balance at Dec. 31, 2019	416	3	403	(38)	48
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(9)			(9)
Capital contribution from parent	285		285
Other comprehensive income (loss)	90				90
Other	4		4
Ending balance at Dec. 31, 2020	786	3	692	(47)	138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(13)			(13)
Capital contribution from parent	50		50
Other comprehensive income (loss)	(52)				(52)
Dividend of AB Units to parent	(61)		(61)
Other	(2)		(2)
Ending balance at Dec. 31, 2021	$ 708	$ 3	$ 679	$ (60)	$ 86