Amount of cash paid to acquire the entity.

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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The amount of acquisition cost of a business combination allocated to inventory, including finished goods, work-in-process, and raw materials.

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The amount of acquisition cost of a business combination allocated to current liabilities of the acquired entity.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance.

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Amount of acquisition cost of a business combination allocated to other assets not separately disclosed in the balance sheet.

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Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Dec. 29, 2012 Phasein [Member]	Jul. 27, 2012 Phasein [Member]	Mar. 09, 2012 Spire Semiconductor LLC [Member]
Business Acquisition [Line Items]
Cash paid for acquired entity				$ 7.2
Purchase price of acquired entity allocated to liabilities				1.2
Purchase price for acquired entity			30.5
Purchase price allocation assigned to goodwill		16.1
Purchase price allocation assigned to intangible assets	14.6	12.6
Purchase price allocation assigned to inventory		1.4
Purchase price allocation assigned to other assets		2.4
Purchase price allocation assigned to liabilities		$ 2.0