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Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Inventories:    
Raw materials $ 118.8 $ 109.3
Work-in-process 112.3 88.4
Finished goods 272.1 270.9
Total inventories 503.2 468.6
Excess and obsolete inventory reserve (41.9) (39.6)
Inventories — net $ 461.3 $ 429.0