XML 102 R74.htm IDEA: XBRL DOCUMENT

Income Taxes - Effective Tax Rates (Detail)	6 Months Ended
Income Taxes - Effective Tax Rates (Detail)	Oct. 26, 2012	Oct. 28, 2011
Schedule Of Effective Tax Rates [Line Items]
Effective tax rates	14.10%	13.10%

- 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.

+ References+ Details