Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Land and land improvements	$ 114.7	$ 113.4
Machinery and equipment	3,496.8	3,276.1
Buildings	822.9	816.2
Construction in progress	374.3	370.6
Property, plant and equipment	4,808.7	4,576.3
Less accumulated depreciation	(3,118.6)	(2,967.4)
Net of depreciation	$ 1,690.1	$ 1,608.9
Land and Land Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Machinery and Equipment \| Minimum
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment \| Maximum
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	8 years
Buildings \| Minimum
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Buildings \| Maximum
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated deprecation and depletion of real estate held for productive use and additions or improvements to real estate held for productive use, examples include, but are not limited to, walkways, driveways, fences, and parking lots. Excludes land held for sale.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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