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Financial Instruments - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Cost of Sales          
Derivative Instruments Gain Loss [Line Items]          
Unrealized gain (loss) on securities $ 3 $ 1 $ (1) $ 8  
Accrued and Other Current Liabilities          
Derivative Instruments Gain Loss [Line Items]          
Commodity contract liability 1   1   $ 1
Other Current Assets          
Derivative Instruments Gain Loss [Line Items]          
Commodity contract asset $ 1   $ 1   $ 1