Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Other Assets [Line Items]
Advanced discounts to customers, non-current	$ 61	$ 62
Operating right-of-use assets (Note 13)	$ 34	$ 35
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Other	$ 10	$ 11
Total	106	$ 108
Undesignated as Hedging | Cross-currency Swap
Other Assets [Line Items]
Undesignated cross-currency swap at fair value	$ 1