Summary of Restructuring Reserve Activity (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Restructuring Cost and Reserve [Line Items]
Document Period End Date	Mar. 31, 2018
Reserve, Beginning Balance	$ 23.2
Restructuring charges	22.9	$ 15.8
Usage	(12.7)
Currency	0.4
Reserve, Ending Balance	33.8
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Reserve, Beginning Balance	20.0
Restructuring charges	22.3
Usage	(11.6)
Currency	0.4
Reserve, Ending Balance	31.1
Facility closures
Restructuring Cost and Reserve [Line Items]
Reserve, Beginning Balance	3.2
Restructuring charges	0.6
Usage	(1.1)
Currency	0.0
Reserve, Ending Balance	2.7
Series of Individually Immaterial Business Acquisitions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	22.9
Severance Costs	$ 22.3