Leases - Schedule of Components of Leased Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Finance lease cost
Depreciation and amortization	$ 0.5
Interest expense	0.2
Lease, Cost	59.0
Variable lease cost	13.1
Cost of services
Operating Leased Assets [Line Items]
Operating lease cost	57.0
General and administrative expenses
Operating Leased Assets [Line Items]
Operating lease cost	$ 1.3