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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]  
Summary of Self-Insurance Reserves The following table summarizes CEQP’s and CMLP’s self-insurance reserves at September 30, 2021 and December 31, 2020 (in millions):
 CEQPCMLP
 September 30,
2021		December 31, 2020September 30,
2021		December 31, 2020
Self-insurance reserves(1)
$6.7 $7.7 $5.8 $6.7 
(1)At September 30, 2021, CEQP and CMLP classified approximately $4.8 million and $4.1 million, respectively, of these reserves as other long-term liabilities on their consolidated balance sheets.