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Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 2,214.7	$ 1,986.3	$ 6,759.8	$ 5,779.1
Assets	7,917.1		7,917.1		$ 7,971.7
Liabilities	4,948.2		4,948.2		4,876.4
Cumulative effect of new accounting principle in period of adoption					0.4
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 0.4
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of expense to other components of periodic pension and postretirement costs		$ 0.1		$ 0.1
Wholly Owned Subsidiary in Argentina
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	21.3
Assets	110.7		110.7
Argentina, Pesos \| Wholly Owned Subsidiary in Argentina
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets	25.2		25.2
Liabilities	$ 11.0		$ 11.0