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Nature of Operations and Significant Accounting Policies (Summary Of Inventories) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
excessandobsoleteinventoryreserve $ 95.8 $ 85.9
Finished goods 130.5 130.6
Finished parts and subassemblies 54.5 66.1
Work in process 45.2 47.7
Raw materials 208.0 212.9
Total inventories $ 438.2 $ 457.3