Presentation of Financial Information - Additional Information (Detail) (Actel Corporation, USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 03, 2011	Jul. 03, 2011	Oct. 02, 2011
Actel Corporation
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Retrospective adjustment that increased non-current deferred tax assets and retained earnings			$ 1.3
Increase (decrease) in income tax expense/benefit	$ (2.2)	$ (2.2)	$ (1.3)