Nature of Operations and Significant Accounting Policies (Narrative) (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) segment shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Jan. 01, 2019 USD ($)	Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Other Assets, Noncurrent	$ 198.1	$ 211.3
Assets	4,588.9	4,423.7	$ 4,042.7
Long-term Debt, Excluding Current Maturities	842.9	842.0
Liabilities and Equity	$ 4,588.9	4,423.7
Number of reporting segments | segment	4
Allowance for doubtful accounts receivable	$ 10.9	7.2
Increase (decrease) in cost of sales by changes in level of LIFO inventories	$ 2.3	$ 6.7	(2.5)
Percentage of inventories cost, LIFO method	30.70%	27.70%
Higher value of LIFO inventories if valued under FIFO	$ 26.8	$ 17.1
Depreciation expense	$ 77.2	71.6	72.7
Number of reporting units | segment	7
Estimated cost of capital, minimum	9.50%
Estimated cost of capital, maximum	11.50%
Estimated cost of capital, weighted	10.50%
2021	$ 44.4
2022	43.9
2023	43.8
2024	42.9
2025 and after	274.4
Intangible assets, net	520.3	505.1	$ 481.8		$ 276.8
Intangibles with indefinite useful lives	$ 70.9	$ 69.9
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares	2.1	1.2	0.4
Operating right-of-use assets	$ 104.2	$ 112.6
Operating lease, liability	$ 109.9	$ 115.5
Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Operating right-of-use assets				$ 109.1
Operating lease, liability				$ 110.4
Minimum [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life- minimum, years	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life- minimum, years	3 years
Maximum [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life- minimum, years	25 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life- minimum, years	10 years