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Organization and Principles of Consolidation - Additional Information (Details)
$ in Billions
3 Months Ended
Mar. 31, 2018
state
store
segment
Apr. 02, 2018
store
Jan. 23, 2018
USD ($)
Jan. 18, 2017
store
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Number of Stores | store 47     97
Percentage of membership interest acquired 100.00%      
Number of operating segments | segment 2      
Sunoco LLC [Member] | Minimum [Member]        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Number of states in which entity operates (more than) | state 30      
Motor Fuels [Member] | Minimum [Member]        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Number of states in which entity operates (more than) | state 30      
Energy Transfer Partners Limited Partnership [Member]        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest 2.30%      
ETE [Member]        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest 26.50%      
7-Eleven sales [Member]        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Business acquisition, total purchase price | $     $ 3.2  
Subsequent Event [Member] | TEXAS        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Number of Stores | store   207