Commitments, Contingencies and Uncertainties (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Operating Leased Assets [Line Items]
Operating leases, future minimum payments due	$ 409.9
Revenue Equipment [Member]
Operating Leased Assets [Line Items]
Operating leases, future minimum payments due	$ 136.4
Operating lease term	5 years