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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Inventories [Abstract]    
Raw materials $ 102.8 $ 93.4
Work-in-process 10.2 11.2
Finished goods 97.5 92.2
Packaging and supplies 43.9 42.4
Total inventories $ 254.4 [1] $ 239.2 [2]
[1] Unaudited
[2] Condensed from audited financial statements