Segment Information and Revenue Recognition - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	1
Revenues	$ 2,773	$ 2,548	$ 2,945
Adjusted EBITDA	$ 228	$ 192	$ 234