Annual report pursuant to Section 13 and 15(d)

Introduction and Basis of Presentation - Narrative (Details)

v3.20.4
Introduction and Basis of Presentation - Narrative (Details)
Feb. 04, 2021
pipelineSystem
mile
Dec. 31, 2020
Pinedale LP    
Schedule of Equity Method Investments [Line Items]    
Equity interest percentage   100.00%
Grand Isle Corridor LP    
Schedule of Equity Method Investments [Line Items]    
Equity interest percentage   100.00%
Subsequent event | Crimson Midstream Holdings, LLC    
Schedule of Equity Method Investments [Line Items]    
Number of critical infrastructure pipeline systems | pipelineSystem 4  
Pipeline system length (in miles) 2,000  
Pipeline system active length (in miles) 1,300  
Subsequent event | Crimson Midstream Holdings, LLC    
Schedule of Equity Method Investments [Line Items]    
Percentage of interest acquired 49.50%