Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Operating lease obligations [Abstract]
Lease and rental expense included in costs and expenses	$ 28.5	$ 22.4
Litigation matters [Member]
Loss Contingencies [Line Items]
Litigation accruals on an undiscounted basis	2.6		$ 4.6
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%