Business and Basis of Presentation (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2017 Facility	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017	Nov. 17, 2017 USD ($)
Business And Basis Of Presentation [Line Items]
Corporate statutory tax rate		21.00%		35.00%
Tax cuts and jobs act of 2017 reclassification from AOCI to retained earnings		$ 54.3
ASU 2017-07 [Member] | Increase in Cost of Goods Sold [Member]
Business And Basis Of Presentation [Line Items]
Reclassification adjustment amount			$ 5.1
ASU 2017-07 [Member] | Increase in Selling General and Administrative Expenses [Member]
Business And Basis Of Presentation [Line Items]
Reclassification adjustment amount			2.8
ASU 2017-07 [Member] | Increase in Other Non-operating Income, Net [Member]
Business And Basis Of Presentation [Line Items]
Reclassification adjustment amount			$ 7.9
Tectum, Inc. [Member]
Business And Basis Of Presentation [Line Items]
Number of manufacturing facility | Facility	2
EMEA and Pacific Rim Business [Member]
Business And Basis Of Presentation [Line Items]
Consideration to be received in connection with sale of businesses					$ 330.0
WAVE [Member]
Business And Basis Of Presentation [Line Items]
Equity interest percentage		50.00%