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Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Property Plant And Equipment [Abstract]    
Land $ 45.0 $ 47.8
Buildings 369.6 379.9
Machinery and equipment 1,684.0 1,704.7
Property, plant and equipment, gross 2,098.6 2,132.4
Less: Accumulated depreciation (1,639.4) (1,632.4)
Total property, plant and equipment-net $ 459.2 $ 500.0