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Acquisitions, Dispositions, and Other Transactions - Narrative (Details) ft² in Thousands, $ in Millions | Sep. 23, 2019 USD ($) | Jul. 31, 2019 USD ($) ft² | Sep. 27, 2019 USD ($)
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Mozambique LNG Assets | Discontinued Operations, Disposed of by Sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Sale for substantially all of assets, liabilities, businesses, and operations |  |  | $ 4,200
Plains All American Pipeline, LP |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of equity method investments | $ 646 |  |
Pre-tax gain on sale of pipeline | $ 111 |  |
Ecopetrol Joint Venture |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Area of development in joint venture | ft² |  | 97 |
Ownership percentage in joint venture |  | 51.00% |
Ecopetrol | Ecopetrol Joint Venture |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Amount due at closing |  | $ 750 |
Carried capital |  | $ 750 |
Minority interest in new venture |  | 49.00% |
Percentage share of capital expenditures |  | 75.00% |
Share of capital expenditures (up to) |  | $ 750 |

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