Benefit Plans - Components of Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3.5	$ 3.3
Interest cost	3.7	3.8
Expected return on plan assets	(2.5)	(2.6)
Net periodic benefit cost	4.7	4.5
Non U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.6	2.0
Interest cost	3.8	4.7
Expected return on plan assets	(4.1)	(4.2)
Net periodic benefit cost	$ 2.3	$ 2.5