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Commitments and Contingencies (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Operating lease obligations [Abstract]          
Lease and rental expense included in costs and expenses $ 28.8 $ 23.5 $ 76.4 $ 69.2  
Litigation matters [Member]          
Loss Contingencies [Line Items]          
Litigation accruals on an undiscounted basis 4.6   4.6   $ 2.4
Litigation matters [Member] | ETP Lawsuit [Member]          
Loss Contingencies [Line Items]          
Loss contingency, damages awarded     319.4    
Loss contingency, total damages sought     535.8    
Loss contingency, disgorgement damages sought     150.0    
Prejudgment interest     $ 66.4    
Post-judgment interest rate (in hundredths)     5.00%    
EFS Midstream Contract with Producers [Member]          
Contractual obligation [Line Items]          
Contractual obligation $ 270.0   $ 270.0    
Contract term (in years)     10 years