Accumulated Other Comprehensive Income (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold		$ (278.3)	$ (248.9)
Income tax (expense) benefit		4.3	3.5
Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net of tax		(2.1)	(0.2)
Unrecognized Pension and Other Post-retirement Benefit Costs | Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Amortization of actuarial loss included in net income	[1]	(1.4)	(1.1)
Amortization of prior service cost	[1]	(0.1)	(0.1)
Total before tax		(1.5)	(1.2)
Income tax (expense) benefit		0.3	0.3
Net of tax		(1.2)	(0.9)
Foreign exchange contracts | Derivative Financial Instruments | Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold		(1.2)	1.1
Income tax (expense) benefit		0.3	(0.4)
Net of tax		$ (0.9)	$ 0.7

[1] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost for pension and post-retirement plans (See "Note 6. Pension and Other Retiree Benefits" for additional details).