v2.4.0.6

Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified | Oct. 27, 2012 item | Jul. 28, 2012
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Fair Value Measurements [Abstract] |  |
Investments in ARS | 1 |
Book value, available-for-sale investments | $ 2.9 |
Par value, available-for-sale investments | 3.9 |
Amount by which fair value of available-for-sale securities is lower than cost basis | $ 1.0 | $ 1.2

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- Definition Available For Sale Investments In Debt Securities Par Value + References No definition available. + Details
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- Definition Available for Sale Securities Amount of Carrying Value Exceeding Fair Value + References No definition available. + Details
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- Definition Number Of Investments In Auction Rate Security + References No definition available. + Details
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- Details
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