Gross Carrying Amount and Accumulated Amortization of Intangible Assets Subject to Amortization (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 157.0	$ 258.6
Accumulated Amortization	(152.6)	(201.5)
Net	4.4	57.1
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	126.1	212.8
Accumulated Amortization	(125.8)	(169.1)
Net	0.3	43.7
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	30.9	35.2
Accumulated Amortization	(26.8)	(23.7)
Net	4.1	11.5
Trade names/trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Assets		0.2
Accumulated Amortization		(0.2)
Leasehold improvements
Finite-Lived Intangible Assets [Line Items]
Gross Assets		(2.7)	[1]
Accumulated Amortization		2.3	[1]
Net		(0.4)	[1]
Non-compete arrangements
Finite-Lived Intangible Assets [Line Items]
Gross Assets		13.1
Accumulated Amortization		(10.8)
Net		$ 2.3

[1] Leasehold improvements as of December 30, 2011, reflects a net reclass of $0.5 million to Restructuring and other charges due to the reduction of a facility.