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, 2021	$ 1,593	$ 1	$ 4,633	$ (58)	$ (2,983)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	65			4	61
Balance at end of period at Jun. 30, 2022	1,658	1	4,633	(54)	(2,922)
Balance at beginning of period at Dec. 31, 2022	2,127	3	5,147	(49)	(2,974)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	49			2	47
Stock compensation expense	13		13
Balance at end of period at Jun. 30, 2023	$ 2,189	$ 3	$ 5,160	$ (47)	$ (2,927)