Other Comprehensive Loss (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	$ 853	$ 1,239	$ 1,818	$ 1,927
Accumulated Other Comprehensive (Loss) /Gain
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	(8)	5	(44)	$ (19)
Cumulative translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	(4)	15	(34)
Pension liability, net of tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	(4)	(10)	(10)
Deferred taxes on the pension liability	$ 1	$ 3	$ 3