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Non-Cash Stock Compensation Expense (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Feb. 01, 2020
Feb. 02, 2019
Feb. 03, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Non-Cash Stock Compensation tax benefit $ 9.0 $ 9.7 $ 2.8