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Differences Between Income Taxes Expected at U.S. Federal Statutory Income Tax Rate and Income Taxes Provided for Continuing Operations (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 31, 2010
Income Taxes [Line Items]      
Provision for income taxes from continuing operations at the U.S. federal statutory rate $ 97.7 $ 99.5 $ 73.3
Increase (decrease) due to:      
State and local income taxes, net of federal benefit 9.0 11.3 7.4
Net change relating to uncertain income tax benefits (5.5) (1.4) (4.3)
Other - net 6.0 4.5 (0.4)
Total provision for income taxes from continuing operations $ 107.2 $ 113.9 $ 76.0