Significant Accounting Policies (Property, Plant and Equipment) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Cost of property repairs and maintenance	$ 19.7	$ 18.3	$ 18.8
Depreciation	16.7	16.4	16.5
Product [Member]
Property, Plant and Equipment [Line Items]
Cost of goods sold, depreciation	$ 16.1	$ 15.9	$ 16.2
Minimum [Member]
Property, Plant and Equipment [Line Items]
Capitalized maintenance cost, amortization period	12 months
Minimum [Member] | Land and Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Capitalized maintenance cost, amortization period	36 months
Maximum [Member] | Land and Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	39 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	20 years