Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Unamortized Intangible Assets (AMS)
Amortization expense of intangible assets	$ 5.3	$ 5.1
Estimated average amortization, remainder of year	25.5
Estimated average amortization, year two	25.5
Estimated average amortization, year three	25.5
Estimated average amortization, year four	25.5
Estimated average amortization, year five	25.5
AMS
Amortized Intangible Assets
Gross Carrying Amount	421.7		$ 336.5
Accumulated Amortization	87.3		82.0
Accumulated Impairments	20.7		20.7
Accumulated Foreign Exchange	3.7		2.5
Net Carrying Amount	310.0		231.3
AMS | Trade names
Amortized Intangible Assets
Accumulated Impairments	0.1		0.1
Accumulated Foreign Exchange	0.1		0.0
Unamortized Intangible Assets (AMS)
Gross Carrying Amount	20.0		20.0
Net Carrying Amount	19.8		19.9
AMS | Customer relationships
Amortized Intangible Assets
Gross Carrying Amount	342.3		276.3
Accumulated Amortization	72.0		67.7
Accumulated Impairments	0.0		0.0
Accumulated Foreign Exchange	2.9		1.8
Net Carrying Amount	267.4		206.8
AMS | Developed technology
Amortized Intangible Assets
Gross Carrying Amount	42.0		34.0
Accumulated Amortization	11.8		10.9
Accumulated Impairments	0.0		0.0
Accumulated Foreign Exchange	0.5		0.4
Net Carrying Amount	29.7		22.7
AMS | Trade names
Amortized Intangible Assets
Gross Carrying Amount	33.0		21.8
Accumulated Amortization	0.8		0.8
Accumulated Impairments	20.7		20.7
Accumulated Foreign Exchange	0.3		0.3
Net Carrying Amount	11.2		0.0
AMS | Non-compete agreements
Amortized Intangible Assets
Gross Carrying Amount	2.9		2.9
Accumulated Amortization	2.2		2.2
Accumulated Impairments	0.0		0.0
Accumulated Foreign Exchange	0.0		0.0
Net Carrying Amount	0.7		0.7
AMS | Patents
Amortized Intangible Assets
Gross Carrying Amount	1.5		1.5
Accumulated Amortization	0.5		0.4
Accumulated Impairments	0.0		0.0
Accumulated Foreign Exchange	0.0		0.0
Net Carrying Amount	$ 1.0		$ 1.1