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Business and Basis of Presentation (Narrative) (Details) $ in Millions		3 Months Ended
	Jan. 13, 2017 Facility	Mar. 31, 2016 USD ($)	Jan. 01, 2017 USD ($)
Business And Basis Of Presentation [Line Items]
Separation costs		$ 27.1
ASU 2016-09 [Member]
Business And Basis Of Presentation [Line Items]
Adoption of accounting standard, cumulative-effect Increase to retained earnings and deferred income taxes assets			$ 8.7
Tectum, Inc. [Member]
Business And Basis Of Presentation [Line Items]
Number of manufacturing facility \| Facility	2

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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