PRESENTATION OF FINANCIAL INFORMATION (Policies)	6 Months Ended
PRESENTATION OF FINANCIAL INFORMATION (Policies)	Apr. 01, 2012
Fair Value of Financial Assets and Liabilities	Fair Value of Financial Assets and Liabilities Accounting Standards Codification (“ASC”) 825 permits entities to elect the fair value option for certain financial assets and financial liabilities. For financial assets or financial liabilities for which an entity elects the fair value option, ASC 825 requires that the entity record the financial asset or financial liability at fair value rather than at historical cost with changes in fair value recorded in the income statement. ASC 825-25 requires that upfront costs and fees related to items for which the fair value option is elected shall be recognized in earnings as incurred and not deferred. As further discussed in Note 13, we elected the fair value option in accounting for the term loan balance outstanding as of October 2, 2011, but following the extinguishment of the term loan in conjunction with our acquisition of Zarlink Semiconductor, Inc., we did not elect the fair value option for the term loan balance outstanding as of April 1, 2012.
Measurement Period for the Acquisition of Actel Corporation	Measurement Period for the Acquisition of Actel Corporation During the first quarter of 2012, we closed the measurement period for the acquisition of Actel Corporation that occurred in the prior year first quarter. We completed our evaluation of income tax-related information regarding facts and circumstances that existed as of the acquisition date. In accordance with ASC 805-10, we retrospectively adjusted the preliminary amounts previously reported and are now reporting the final amounts. In the balance sheet as of October 2, 2011, we have reflected a retrospective adjustment of $1.3 million that increased non-current deferred tax assets and retained earnings. While the retrospective adjustment will have the effect of reducing income tax expense for 2011 by $1.3 million, due to the timing of the application of this retrospective adjustment, income tax expense for the quarter and six months ended April 3, 2011 increased by $2.2 million compared to previously reported amounts.

Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Emerging Issues Task Force (EITF)

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-Section SEC Observer Comments

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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