Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Schedule of Minimum Contractual Lease Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Within one year	$ 9	$ 9
After one year and within two years	8	7
After two years and within three years	5	5
After three years and within four years	3	3
After four years and within five years	2	1
After five years	1	2
Total	$ 28	$ 27