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
3 Months Ended 9 Months Ended
Apr. 28, 2012
Apr. 30, 2011
Apr. 28, 2012
Apr. 30, 2011
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]        
Basic 153.3 155.7 153.3 156.5
Dilutive effect of stock options, restricted stock, restricted stock units and convertible debt securities 6.6 6.0 5.8 5.8
Diluted shares 159.9 161.7 159.1 162.3