Schedule of Property Plant and Equipment (Detail) - USD ($) $ in Millions	Mar. 27, 2016	Dec. 27, 2015
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 2,021.7	$ 2,021.8
Less accumulated depreciation	1,484.6	1,471.4
Total property, plant, and equipment, net	537.1	550.4
Land and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	17.7	17.7
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	287.0	284.6
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	1,680.7	1,667.4
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 36.3	$ 52.1