Restructuring - Restructuring Related Costs Included in Selling, General & Administrative expenses on Consolidated Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 24.0	$ 35.5	$ 24.0	$ 52.9
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	20.6	21.2	20.6	34.6
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 3.4	$ 14.3	$ 3.4	$ 18.3