Revenue Recognition - Receivables and Contract Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Accounts receivable – third parties, net	$ 16		$ 20
Contract assets – related parties	218		233
Deferred revenue	2		4
Third Parties
Disaggregation of Revenue [Line Items]
Accounts receivable – third parties, net	13	$ 19	19	$ 11
Deferred revenue	2	4	4	0	$ 0
Related Parties
Disaggregation of Revenue [Line Items]
Accounts receivable – third parties, net	35	18	18	24
Contract assets – related parties	218	233	233	0
Deferred revenue	$ 31	$ 19	$ 19	$ 0	$ 0