Statements of Equity - USD ($) $ in Millions	Total	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2019	$ 414		$ 3	$ 403	$ (40)	$ 48
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(10)				(10)
Capital contribution from parent	285			285
Other comprehensive income (loss)	88					88
Other	4			4
Ending balance at Dec. 31, 2020	781	$ 781	3	692	(50)	136
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(20)				(20)
Capital contribution from parent	50	50
Other comprehensive income (loss)	(50)					(50)
Dividend of AB Units to parent	(61)			(61)
Other	(1)			(1)
Ending balance at Dec. 31, 2021	699	$ 699	3	680	(70)	86
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(38)				(38)
Capital contribution from parent	150			150
Other comprehensive income (loss)	(441)					(441)
Other	1			1
Ending balance at Dec. 31, 2022	$ 371		$ 3	$ 831	$ (108)	$ (355)