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	42			6	36
Balance at end of period at Mar. 31, 2022	1,635	1	4,633	(52)	(2,947)
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	12			0	12
Stock compensation expense	4		4
Balance at end of period at Mar. 31, 2023	$ 2,143	$ 3	$ 5,151	$ (49)	$ (2,962)