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New Accounting Pronouncements (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Aug. 04, 2018
May 05, 2018
Feb. 03, 2018
Aug. 04, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Excess tax benefit $ 6.0 $ 8.2 $ 10.0 $ 24.2
Accounting Standards Update 2016-09        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Excess tax benefit from share-based compensation, operating activities     (30.2)  
Excess tax benefit from share-based compensation, financing activities $ 30.2   $ 30.2  
Weighted average number of shares outstanding, increase during period (in Shares)       1.0