Nature Of Operations And Significant Accounting Policies (Summary Of Property, Plant And Equipment, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Land	$ 62.7	$ 66.6
Buildings and improvements	183.4	193.5
Machinery and equipment	593.3	566.8
Gross property, plant and equipment	839.4	826.9
Less: accumulated depreciation	557.0	548.0
Property, plant and equipment, net	$ 282.4	$ 278.9

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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