Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	$ 474.1		$ 474.1		$ 456.6
Accumulated Amortization, intangible assets subject to amortization	(243.1)		(243.1)		(223.4)
Net Carrying Amount, intangible assets subject to amortization	231.0		231.0		233.2
Amortization expense related to intangible assets subject to amortization	9.0	$ 9.2	26.7	$ 29.2
Technology
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	314.4		314.4		300.9
Accumulated Amortization, intangible assets subject to amortization	(198.0)		(198.0)		(182.4)
Net Carrying Amount, intangible assets subject to amortization	116.4		116.4		118.5
Customer relationships
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	144.2		144.2		134.7
Accumulated Amortization, intangible assets subject to amortization	(40.7)		(40.7)		(30.9)
Net Carrying Amount, intangible assets subject to amortization	103.5		103.5		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 names
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	14.8		14.8		13.7
Accumulated Amortization, intangible assets subject to amortization	(3.9)		(3.9)		(2.9)
Net Carrying Amount, intangible assets subject to amortization	10.9		10.9		10.8
Other
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	0.7		0.7		5.5
Accumulated Amortization, intangible assets subject to amortization	(0.5)		(0.5)		(5.4)
Net Carrying Amount, intangible assets subject to amortization	$ 0.2		$ 0.2		$ 0.1