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Income per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Jan. 30, 2021
Feb. 01, 2020
Jan. 30, 2021
Feb. 01, 2020
Feb. 01, 2020
Earnings Per Share [Abstract]          
Net Income $ 31.9 $ 41.2 $ 91.2 $ 93.3 $ 93.3
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]          
Denominator for Basic Income per Share-Weighted Average Shares Outstanding and Vested/Unissued RSUs 38,106,793 37,587,742 38,016,711   37,570,423
Dilutive Potential Common Shares-Employee Stock Options, PSAs and RSUs 293,303 166,229 211,974   150,093
Denominator for Diluted Income per Share 38,400,096 37,753,971 38,228,685   37,720,516
Basic and Diluted Income per Share:          
Basic Income per Share (in dollars per share) $ 0.84 $ 1.10 $ 2.40 $ 2.48 $ 2.48
Diluted Income per Share (in dollars per share) $ 0.83 $ 1.09 $ 2.39 $ 2.47 $ 2.47
Number of Anti-dilutive Potentially Issuable Shares Excluded from Diluted Common Shares Outstanding 917,000 646,075 678,556   721,604