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Organization and Description of Business (Narrative) (Details) - 12 months ended Dec. 31, 2019
Total
segment
reporting_units
Partnership Organization And Basis Of Presentation [Line Items]      
Number of operating segments   3 3
Crestwood Equity Partners LP      
Partnership Organization And Basis Of Presentation [Line Items]      
Limited partnership interest 99.90%    
Crestwood Gas Services GP, LLC      
Partnership Organization And Basis Of Presentation [Line Items]      
Limited partnership interest 0.10%    
Common Unit Capital | Crestwood Holdings      
Partnership Organization And Basis Of Presentation [Line Items]      
General partner ownership percentage 25.00%