Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3.5	$ 3.3	$ 10.5	$ 9.9
Interest cost	3.7	3.8	11.1	11.4
Expected return on plan assets	(2.5)	(2.6)	(7.5)	(7.8)
Net periodic benefit cost	4.7	4.5	14.1	13.5
Non U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.6	2.0	7.8	6.0
Interest cost	3.8	4.7	11.4	14.1
Expected return on plan assets	(4.1)	(4.2)	(12.3)	(12.6)
Net periodic benefit cost	$ 2.3	$ 2.5	$ 6.9	$ 7.5