Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment	$ 228.8	$ 206.0
Less: accumulated depreciation	(173.8)	(151.1)
Total	55.0	54.9
Depreciation	28.0	28.3	$ 28.0
Selling, General and Administrative Expenses
Property, Plant and Equipment [Line Items]
Depreciation	23.4	23.7	17.7
Cost of Sales [Member]
Property, Plant and Equipment [Line Items]
Depreciation	4.6	4.6	$ 10.3
Computer hardware and software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	172.2	154.3
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	24.0	24.2
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	24.4	23.9
Work-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 8.2	$ 3.6