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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
May 04, 2019
Feb. 02, 2019
Nov. 03, 2018
May 05, 2018
Operating Loss Carryforwards [Line Items]        
Effective income tax rate (as a percent) 11.70%     23.00%
Measurement period adjustment   $ 25.8 $ (19.6)  
Aggregate accruals for uncertain tax positions, including penalties and interest $ 38.7 41.4    
Other long-term liabilities        
Operating Loss Carryforwards [Line Items]        
Transition tax liability $ 25.8 $ 25.8