v3.7.0.1
Computation of Net Income (Loss) Per Common Share - Reconciliation of Common Shares Used in Calculating Basic and Diluted Net Income (Loss) Per Common Share (Detail)(1) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Equity [Abstract]        
Net income $ 22.2 $ 27.9 $ 81.2 $ 93.7
Antidilutive restricted shares and options excluded from computation of EPS 2.1 1.4 2.1 1.3
Basic weighted average common shares outstanding 101.4 104.0 101.3 103.9
Dilutive effect of stock options and restricted stock awards 0.1 0.3 0.1 0.3
Diluted 101.5 104.3 101.4 104.2
Earnings Per Share, Basic $ 0.22 $ 0.27 $ 0.80 $ 0.90
Earnings Per Share, Diluted $ 0.22 $ 0.27 $ 0.80 $ 0.90