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Organization and Principles of Consolidation - Additional Information (Details)
3 Months Ended
Mar. 31, 2020
state
Organization Consolidation And Presentation Of Financial Statements [Line Items]  
Percentage of membership interest acquired 100.00%
Sunoco LLC [Member] | Minimum [Member]  
Organization Consolidation And Presentation Of Financial Statements [Line Items]  
Number of states in which entity operates (more than) 30
Parent Company [Member]  
Organization Consolidation And Presentation Of Financial Statements [Line Items]  
Percentage of membership interest acquired 28.60%
Parent Company [Member] | Common Units [Member]  
Organization Consolidation And Presentation Of Financial Statements [Line Items]  
Percentage of membership interest acquired 34.30%