Nature of Operations and Significant Accounting Policies (Recently Adopted Accounting Pronouncements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 6.7
Contract assets	$ 66.7	$ 55.8
Cost of Goods and Services Sold	1,930.7	2,104.1	2,156.2
Inventory, Net	438.2	457.3
Other Assets, Current	137.4	79.5
Operating right-of-use assets	104.2	112.6
Operating lease, liability	$ 109.9	$ 115.5
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 6.7
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating right-of-use assets				$ 109.1
Operating lease, liability				$ 110.4