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Financial and Derivative Instruments (Details 2) - Commodity - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 457 | $ (245)
Sales and other operating revenues |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 461 | (238)
Purchased crude oil and products |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | (4) | (7)
Other income |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 0 | $ 0

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