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Income Taxes (Effective Tax Rate) (Details)	3 Months Ended
Income Taxes (Effective Tax Rate) (Details)	Jul. 29, 2011	Jul. 30, 2010
Income Taxes
Effective Tax Rate	16.50%	11.90%

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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