Summary of Acquired Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Gross Carrying Amount	$ 356.8	$ 356.8
Goodwill	169.3	169.3
Identifiable intangible assets, Accumulated Amortization	(313.3)	(309.5)
Identifiable intangible assets, including goodwill, Gross Carrying Amount	526.1	526.1
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Gross Carrying Amount	250.8	250.8
Identifiable intangible assets, Accumulated Amortization	(231.3)	(228.4)
Developed Technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	2 years
Developed Technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	15 years
Customer Base
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Gross Carrying Amount	81.6	81.6
Identifiable intangible assets, Accumulated Amortization	(71.7)	(71.1)
Customer Base | Minimum
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	8 years
Customer Base | Maximum
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	10 years
Core Technology
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	10 years
Identifiable intangible assets, Gross Carrying Amount	15.7	15.7
Identifiable intangible assets, Accumulated Amortization	(4.1)	(3.9)
In Process R&D
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	10 years
Identifiable intangible assets, Gross Carrying Amount	2.8	2.8
Identifiable intangible assets, Accumulated Amortization	(0.3)	(0.2)
Patents
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, Period of Amortization	4 years
Identifiable intangible assets, Gross Carrying Amount	5.9	5.9
Identifiable intangible assets, Accumulated Amortization	$ (5.9)	$ (5.9)