Postretirement Health Care Plans - Net Periodic Postretirement Health Care Cost (Detail) - Other Postretirement Benefit Plans, Defined Benefit [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Postretirement Health Care Plans [Line Items]
Service cost	$ 0.1	$ 0.1	$ 0.1	$ 0.1
Interest cost	0.5	0.6	1.6	1.9
Expected return on plan assets	(0.2)	(0.3)	(0.7)	(0.9)
Amortization of unrecognized loss			0.2
Net periodic pension cost	$ 0.4	$ 0.4	$ 1.2	$ 1.1