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Investments Investments (Details)
Dec. 31, 2018
Florida Gas Transmission Company, L.L.C.  
Schedule of Equity Method Investments [Line Items]  
Miles Of Pipeline 5,300
Energy Transfers Partners L.P. | Fayetteville Express  
Schedule of Equity Method Investments [Line Items]  
Equity Method Investment, Ownership Percentage 50.00%
Citrus Corporation  
Schedule of Equity Method Investments [Line Items]  
Equity Method Investment, Ownership Percentage 50.00%
Citrus Corporation | Energy Transfers Partners L.P.  
Schedule of Equity Method Investments [Line Items]  
Equity Method Investment, Ownership Percentage 50.00%