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Basis of Presentation (Details) - USD ($)
$ in Millions
Apr. 26, 2020
Oct. 28, 2019
Oct. 27, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Right-of-use asset $ 242   $ 0
Lease liability $ 244    
Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Right-of-use asset   $ 160  
Deferred rent   4  
Lease liability   $ 164