Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 688.3	$ 606.6
Less: Accumulated depreciation	(388.9)	(292.8)
Total property and equipment, net	299.4	313.8
Depreciation and amortization	109.4	105.8	$ 90.4
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	226.4	189.9
Plant and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	150.9	134.9
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	222.2	205.8
Equipment under finance lease
Property, Plant and Equipment [Line Items]
Property and equipment, gross	55.3	43.6
Software under development
Property, Plant and Equipment [Line Items]
Property and equipment, gross	23.0	20.2
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 10.5	$ 12.2