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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 01, 2020
Aug. 03, 2019
Aug. 01, 2020
Aug. 03, 2019
Valuation Allowance [Line Items]        
Effective income tax rate 21.50% (8.10%) 8.30% 0.90%
Valuation allowance $ 16.2      
Tax benefit, CARES Act $ 9.1   $ 28.6  
Discrete tax expense, share-based compensation   $ 1.1   $ 2.5
Previously Recognized Deferred Tax Assets        
Valuation Allowance [Line Items]        
Valuation allowance     55.0  
Federal, State And Local Income Taxes And Other Tax Credits        
Valuation Allowance [Line Items]        
Valuation allowance     $ 22.3