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Balance Sheet Information - Supplemental Information on Balance Sheets (Detail) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Inventories:    
Raw materials and supplies $ 233.8 $ 224.9
Work in process 62.6 58.3
Finished products 322.8 297.6
Total inventories 619.2 580.8
Property, plant and equipment, gross 1,803.8 1,780.4
Less: accumulated depreciation 1,061.0 1,040.4
Property, plant and equipment, net $ 742.8 $ 740.0