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Summary of Significant Accounting Policies - Schedule Of Inventory, Current (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]    
Finished goods $ 146.8 $ 121.8
Work-in-process 12.2 11.5
Raw materials and supplies 55.7 49.7
Total $ 214.7 $ 183.0