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Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Inventories [Abstract]    
Raw materials $ 93.4 $ 82.5
Work-in-process 11.2 7.9
Finished goods 92.2 92.3
Packaging and supplies 42.4 36.6
Total inventories $ 239.2 $ 219.3