Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020	$ 11,643	$ 2	$ 7,841	$ (795)	$ 4,595
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent company	(7)			(7)
Capital contribution from parent company	750		750
Net income (loss)	(1,384)			(1,384)
Other comprehensive income (loss)	(2,309)				(2,309)
Other	(53)		(52)	(1)
Ending balance at Sep. 30, 2021	8,640	2	8,539	(2,187)	2,286
Beginning balance at Jun. 30, 2021	8,589	2	8,531	(2,584)	2,640
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	398			398
Other comprehensive income (loss)	(354)				(354)
Other	7		8	(1)
Ending balance at Sep. 30, 2021	8,640	2	8,539	(2,187)	2,286
Beginning balance at Dec. 31, 2021	8,706	2	8,546	(2,199)	2,357
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent company	(951)			(951)
Net income (loss)	2,088			2,088
Other comprehensive income (loss)	(9,452)				(9,452)
Other	7		13	(6)
Ending balance at Sep. 30, 2022	398	2	8,559	(1,068)	(7,095)
Beginning balance at Jun. 30, 2022	3,501	2	8,539	(206)	(4,834)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent company	(951)			(951)
Net income (loss)	88			88
Other comprehensive income (loss)	(2,261)				(2,261)
Other	21		20	1
Ending balance at Sep. 30, 2022	$ 398	$ 2	$ 8,559	$ (1,068)	$ (7,095)