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 6 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 28, 2012
Jan. 29, 2011
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]        
Basic 76.3 78.4 76.7 78.4
Dilutive effect of stock options, restricted stock, restricted stock units and convertible debt securities 2.5 2.7 2.4 2.7
Diluted shares 78.8 81.1 79.1 81.1