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Restructuring - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 28.4
Carrying values in excess of estimated fair values	1.6
Expected restructuring cost	24.0
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	23.3
Asset impairment charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.6	$ 0.4
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.5
Other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.0
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	23.0
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5.4

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