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Income Taxes (Effective Tax Rates) (Details)	6 Months Ended
Income Taxes (Effective Tax Rates) (Details)	Oct. 28, 2011	Oct. 29, 2010
Income Taxes [Abstract]
Effective tax rates	13.10%	12.60%

- 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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