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Other Contingencies and Commitments (Details) bbl / d in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) bbl / d | Dec. 31, 2018 USD ($) | Dec. 31, 2009 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |
Indemnifications acquirer environmental liabilities max obligation |  |  | $ 200,000,000
Reserve Quantities [Line Items] |  |  |
Investments in equity affiliates | $ 37,417,000,000 | $ 35,546,000,000 |
Venezuela |  |  |
Reserve Quantities [Line Items] |  |  |
Oil production | bbl / d | 34 |  |
Investments in equity affiliates | $ 2,700,000,000 |  |
Recognized losses | $ 21,000,000 |  |

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