Subsequent Event	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventOn October 25, 2021, we entered into a merger agreement with Oasis Midstream Partners LP (Oasis Midstream) under which we will acquire Oasis Midstream in an equity and cash transaction valued at approximately $1.8 billion. Pursuant to the merger agreement, Oasis Petroleum Inc. (Oasis Petroleum) will receive $150 million in cash plus 21.0 million newly issued CEQP common units in exchange for its 33.8 million common units held in Oasis Midstream. In addition, Oasis Midstream’s public unitholders will receive 12.9 million newly issued CEQP common units in exchange for the 14.8 million Oasis Midstream common units held by them. Additionally, under the merger agreement, Oasis Petroleum will receive a $10 million cash payment for its ownership of the general partner of Oasis Midstream. The completion of the merger is subject to the satisfaction or waiver of customary closing conditions, including, among others: (i) adoption of the merger agreement by holders of a majority of the outstanding Oasis Midstream common units, (ii) expiration or termination of review under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 and (iii) effectiveness of a registration statement on Form S-4 in connection with the issuance of CEQP common units in the merger.