XML 13 R33.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Instruments - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Cost of Sales      
Derivative Instruments Gain Loss [Line Items]      
Unrealized gain (loss) on securities $ (4) $ 7  
Accrued and Other Liabilities      
Derivative Instruments Gain Loss [Line Items]      
Commodity contract liability $ 4    
Other Current Assets      
Derivative Instruments Gain Loss [Line Items]      
Commodity contract asset     $ 1