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Acquisitions and Divestitures	12 Months Ended
Acquisitions and Divestitures	Dec. 31, 2019
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures Acquisitions. In 2018, we completed acquisitions of (i) producing properties and proved undeveloped acreage in Eagle Ford for approximately $246 million and (ii) additional working interests in certain producing properties in Eagle Ford for approximately $31 million. Our consolidated balance sheet reflects the cost of each of these assets acquired during the year as proved properties. Divestitures. During 2018, we also completed the sale of certain assets in Northeastern Utah (“NEU”) for approximately $177 million. We treated this sale as a normal retirement reflecting the difference between net cash proceeds and the underlying net book value of the assets sold in accumulated depreciation rather than recording a gain on sale of assets.