Acquisitions (Narrative) (Details) (USD $) In Millions	1 Months Ended
Sep. 30, 2011	Jun. 25, 2010
Business Acquisition [Line Items]
Purchase price of acquired entity	$ 72.7	$ 35.2
Cash acquired	7.9
Goodwill from acquisition	63.4
Intangible assets acquired	$ 23.9
Acquired Technology [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets, remaining amortization period, years	seven
Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets, remaining amortization period, years	ten

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Publisher FASB

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- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15, 16, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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-Topic 230

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A description of the remaining amortization period of a major finite-lived intangible asset class.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 926

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- Definition

The value of all consideration given or received by the Entity in the significant acquisition or disposal.

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