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Fair Value of Financial Instruments - Textuals (Details) - USD ($)
$ in Millions
3 Months Ended
Feb. 01, 2019
Apr. 30, 2019
Jul. 31, 2019
Debt Instrument [Line Items]      
Operating Lease, Impairment Loss $ 9.6    
ASU 2016-02      
Debt Instrument [Line Items]      
Operating Lease, Impairment Loss   $ 9.6  
LVMH Note      
Debt Instrument [Line Items]      
Debt instrument interest rate     2.00%
Debt discount     $ 40.0