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Divestitures and Other Transactions - Narrative (Details) - USD ($) $ in Millions |  | 1 Months Ended |
--- | --- | --- | ---
Jul. 29, 2021 | Mar. 31, 2021 | Jun. 30, 2021
Disposed of by Sale, Not Discontinued Operations | Permian Basin | Subsequent Event |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Net proceeds from sale | $ 475 |  |
Disposed of by Sale, Not Discontinued Operations | DJ Basin |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Net proceeds from sale |  | $ 280 |
Discontinued Operations, Held-for-sale | Permian Basin |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Property, plant and equipment, net |  |  | $ 525
Asset retirement obligation |  |  | $ 50

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