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Investment and Variable Interest Entity (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
May 02, 2020
May 04, 2019
May 02, 2020
May 04, 2019
Aug. 03, 2019
May 06, 2019
Schedule of Equity Method Investments [Line Items]            
Equity method investment $ 53.1   $ 53.1   $ 42.1  
(Loss) income from equity method investment (12.3) $ 0.0 $ 11.0 $ 0.0    
Minimum            
Schedule of Equity Method Investments [Line Items]            
Service agreement term (months)     3 months      
Maximum            
Schedule of Equity Method Investments [Line Items]            
Service agreement term (months)     36 months      
Maurices | Discontinued Operations, Disposed of by Sale            
Schedule of Equity Method Investments [Line Items]            
Equity method investment         $ 42.1  
Disposal group, including discontinued operations, transition services, fair value 15.5   $ 48.4      
Receivable, equity method investment 45.2   45.2      
Maurices            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage by parent (percent)           49.60%
Maurices | Maurices | Discontinued Operations, Disposed of by Sale            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage by parent (percent)         49.60%  
Non-current assets | Maurices | Discontinued Operations, Disposed of by Sale            
Schedule of Equity Method Investments [Line Items]            
Receivable, equity method investment $ 12.0   $ 12.0