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Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Property Plant And Equipment [Abstract]    
Land $ 48.2 $ 51.0
Buildings 378.0 389.5
Machinery and equipment 1,788.2 1,797.1
Property, plant and equipment, gross 2,214.4 2,237.6
Less: Accumulated depreciation (1,693.5) (1,706.3)
Total property, plant and equipment-net $ 520.9 $ 531.3