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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Oct. 27, 2012 | Oct. 29, 2011
Consolidated Statements Of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 43.1 |  | $ 47.5 |
Other comprehensive income (loss), net of tax: |  |  |  |
Net change in unrealized gains (losses) on available-for-sale investments | 0.2 | [1] | (0.2) | [1]
Foreign currency translation adjustment | 0.2 |  | (0.2) |
Total other comprehensive income (loss) | 0.4 |  | (0.4) |
Total comprehensive income | $ 43.5 |  | $ 47.1 |
[1] | No tax benefits have been provided in any period primarily due to the uncertainty of realization of cumulative capital loss tax benefits.

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