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Balance Sheet Information - Supplemental Information on Balance Sheets (Detail) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Inventories:    
Raw materials and supplies $ 229.6 $ 224.9
Work in process 61.2 58.3
Finished products 336.2 297.6
Total inventories 627.0 580.8
Property, plant and equipment, gross 1,815.9 1,780.4
Less: accumulated depreciation 1,078.3 1,040.4
Property, plant and equipment, net $ 737.6 $ 740.0