Restructuring Charges - Restructuring Reserve Activity (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 29, 2013
December 2012 Plan [Member]
Restructuring Reserve Activity
Restructuring liability at beginning	$ 1.6
Restructuring and restructuring-related charges, excluding asset impairments and write-offs	0.8
Cost paid	(2.4)
Restructuring liability at ending	0
June 2012 Plan [Member]
Restructuring Reserve Activity
Restructuring liability at beginning	0.1
Restructuring and restructuring-related charges, excluding asset impairments and write-offs	0
Cost paid	(0.1)
Restructuring liability at ending	0
June 2013 Plan [Member]
Restructuring Reserve Activity
Restructuring liability at beginning	0
Restructuring and restructuring-related charges, excluding asset impairments and write-offs	5.2
Cost paid	(1.9)
Restructuring liability at ending	$ 3.3