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Balance Sheet Information - Supplemental Information on Balance Sheets (Detail) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Inventories:    
Raw materials and supplies $ 216.3 $ 178.1
Work in process 59.2 54.0
Finished products 264.9 230.1
Total inventories 540.4 462.2
Property, plant and equipment, gross 1,515.3 1,396.3
Less: accumulated depreciation 909.0 856.5
Property, plant and equipment, net $ 606.3 $ 539.8