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Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Net Sales
Net Sales	$ 288.2	$ 261.5
Percentage of Net Sales	100.00%	100.00%
Operating Profit
Operating Profit	$ 33.5	$ 34.1
Percentage of Operating Profit	100.00%	100.00%
AMS
Net Sales
Net Sales	$ 163.0	$ 122.9
EP
Net Sales
Net Sales	125.2	138.6
Operating Segments | AMS
Net Sales
Net Sales	$ 163.0	$ 122.9
Percentage of Net Sales	56.60%	47.00%
Operating Profit
Operating Profit	$ 21.3	$ 13.7
Percentage of Operating Profit	63.60%	40.20%
Operating Segments | EP
Net Sales
Net Sales	$ 125.2	$ 138.6
Percentage of Net Sales	43.40%	53.00%
Operating Profit
Operating Profit	$ 29.9	$ 33.4
Percentage of Operating Profit	89.20%	97.90%
Unallocated
Operating Profit
Operating Profit	$ (17.7)	$ (13.0)
Percentage of Operating Profit	(52.80%)	(38.10%)

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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