Summary of Restructuring Reserve Activity (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Restructuring Cost and Reserve [Line Items]
Document Period End Date			Sep. 30, 2017
Reserve, Beginning Balance			$ 35.6
Restructuring charges	$ 19.1	$ 9.1	42.9	$ 27.3
Usage			(48.9)
Currency			2.4
Reserve, Ending Balance	32.0		32.0
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Reserve, Beginning Balance			21.4
Restructuring charges			34.4
Usage			(32.8)
Currency			2.1
Reserve, Ending Balance	25.1		25.1
Facility closures
Restructuring Cost and Reserve [Line Items]
Reserve, Beginning Balance			14.2
Restructuring charges			8.5
Usage			(16.1)
Currency			0.3
Reserve, Ending Balance	6.9		6.9
Series of Individually Immaterial Business Acquisitions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	19.1		42.9
Severance Costs	$ 16.3		$ 34.4