v2.4.0.6
Reconciliation of Weighted Average Number of Common Shares Outstanding used to Calculate Basic Net Income per Common Share to Shares used in Calculating Diluted Net Income per Common Share (Detail)
In Millions, unless otherwise specified
12 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 31, 2010
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]      
Basic 153.5 156.1 144.4
Dilutive effect of stock options, restricted stock, restricted stock units and convertible debt securities 5.9 5.7 9.6
Diluted shares 159.4 161.8 154.0