Consolidated Statements of Shareholder's Equity (Unaudited) - USD ($) $ in Millions	Total	Common stock	Additional paid- in capital	Accumulated other comprehensive loss	Accumulated deficit
Balance at beginning of period at Dec. 31, 2020	$ 1,427	$ 1	$ 4,633	$ (70)	$ (3,137)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	103			7	96
Balance at end of period at Sep. 30, 2021	1,530	1	4,633	(63)	(3,041)
Balance at beginning of period at Dec. 31, 2021	1,593	1	4,633	(58)	(2,983)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	341			1	340
Dividend to US Holding	(396)				(396)
Balance at end of period at Sep. 30, 2022	$ 1,538	$ 1	$ 4,633	$ (57)	$ (3,039)