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Financial and Derivative Instruments - Fair Value of Derivatives Not Designated as Hedging Instruments (Details) - Commodity - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
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Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Assets at Fair Value | $ 23 | $ 11
Total Liabilities at Fair Value | 83 | 74
Accounts and notes receivable, net |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Assets at Fair Value | 16 | 11
Long-term receivables, net |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Assets at Fair Value | 7 | 0
Accounts payable |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Liabilities at Fair Value | 80 | 74
Deferred credits and other noncurrent obligations |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Liabilities at Fair Value | $ 3 | $ 0

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