Leases - Components of Lease Cost (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 150.9
Short-term lease cost	33.1
Variable lease cost	58.1
Operating lease cost	242.1
Depreciation and amortization	2.3
Interest expense	0.9
Net lease cost	245.3
Sublease income	5.5
General and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 6.0