Business Combinations and Investments, Goodwill and Acquired Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	Apr. 01, 2012
Estimated fair values allocated to the assets acquired and liabilities
Current assets	$ 11.1
Property, plant and equipment	8.0
Goodwill	14.2
Acquired intangible assets	11.9
Other long-term assets	0.1
Current liabilities	(5.1)
Long-term liabilities	(3.9)
Net assets acquired	$ 36.3

The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The amount of acquisition cost of a business combination allocated to current assets.

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

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The amount of acquisition cost of a business combination allocated to noncurrent assets of the acquired entity, except for property plant and equipment, intangible assets, and goodwill.

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The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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The net amount recognized as of the acquisition date for the aggregate identifiable assets acquired in excess of or less than the aggregate liabilities assumed.

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