Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	$ 452.1		$ 456.6
Accumulated Amortization, intangible assets subject to amortization	(230.9)		(223.4)
Net Carrying Amount, intangible assets subject to amortization	221.2		233.2
Amortization expense related to intangible assets subject to amortization	8.7	$ 10.1
Technology
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	298.4		300.9
Accumulated Amortization, intangible assets subject to amortization	(186.7)		(182.4)
Net Carrying Amount, intangible assets subject to amortization	111.7		118.5
Customer relationships
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	132.9		134.7
Accumulated Amortization, intangible assets subject to amortization	(33.8)		(30.9)
Net Carrying Amount, intangible assets subject to amortization	99.1		103.8
Non compete contracts
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	1.8		1.8
Accumulated Amortization, intangible assets subject to amortization	(1.8)		(1.8)
Trade names
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	13.5		13.7
Accumulated Amortization, intangible assets subject to amortization	(3.2)		(2.9)
Net Carrying Amount, intangible assets subject to amortization	10.3		10.8
Other
Intangible assets
Gross Carrying Amount, intangible assets subject to amortization	5.5		5.5
Accumulated Amortization, intangible assets subject to amortization	(5.4)		(5.4)
Net Carrying Amount, intangible assets subject to amortization	$ 0.1		$ 0.1