Income Taxes (Deferred Tax Assets Or Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Assets	$ 141.3	$ 137.4
Liabilities	(327.2)	(189.6)
Valuation allowance	(16.8)	(13.2)
Total deferred taxes assets	124.5	124.2
Net deferred tax liability	(202.7)	(65.4)
Property, plant and equipment
Income Tax Contingency [Line Items]
Assets	19.1	19.7
Liabilities	(84.8)	(67.8)
Inventories
Income Tax Contingency [Line Items]
Assets	2.3	2.1
Liabilities	(13.2)	(10.3)
Accrued expenses
Income Tax Contingency [Line Items]
Assets	59.9	60.3
Liabilities	(4.2)	(0.1)
Net operating losses and other tax carryforwards
Income Tax Contingency [Line Items]
Assets	31.9	27.2
Liabilities	0.0	0.0
Pension cost and other post-retirement benefits
Income Tax Contingency [Line Items]
Assets	18.2	13.4
Liabilities	(0.7)	(0.6)
Intangible assets
Income Tax Contingency [Line Items]
Assets	0.3	0.4
Liabilities	(199.5)	(84.6)
Derivative financial instruments
Income Tax Contingency [Line Items]
Assets	3.0	5.0
Liabilities	(1.7)	(1.3)
Tax on undistributed earnings (primarily from Canada and China)
Income Tax Contingency [Line Items]
Assets	0.0	0.0
Liabilities	(16.8)	(18.8)
Uncertain tax positions
Income Tax Contingency [Line Items]
Assets	1.4	2.4
Liabilities	0.0	0.0
Other
Income Tax Contingency [Line Items]
Assets	5.2	6.9
Liabilities	$ (6.3)	$ (6.1)