Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	$ 473.6	$ 456.6
Accumulated Amortization, intangible assets subject to amortization	(244.5)	(223.4)
Net Carrying Amount, intangible assets subject to amortization	229.1	233.2
Amortization expense related to intangible assets subject to amortization	35.8	38.3	$ 28.9
Technology
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	309.8	300.9
Accumulated Amortization, intangible assets subject to amortization	(194.6)	(182.4)
Net Carrying Amount, intangible assets subject to amortization	115.2	118.5
Customer relationships
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	148.3	134.7
Accumulated Amortization, intangible assets subject to amortization	(45.4)	(30.9)
Net Carrying Amount, intangible assets subject to amortization	102.9	103.8
Non compete contracts
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization		1.8
Accumulated Amortization, intangible assets subject to amortization		(1.8)
Trade name
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	15.2	13.7
Accumulated Amortization, intangible assets subject to amortization	(4.4)	(2.9)
Net Carrying Amount, intangible assets subject to amortization	10.8	10.8
Other
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	0.3	5.5
Accumulated Amortization, intangible assets subject to amortization	(0.1)	(5.4)
Net Carrying Amount, intangible assets subject to amortization	$ 0.2	$ 0.1