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Description of Business and Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements (Details)
$ in Millions
Apr. 27, 2019
USD ($)
Minimum  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Estimated right of use asset and lease liability upon adoption of ASC842 $ 24
Maximum  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Estimated right of use asset and lease liability upon adoption of ASC842 $ 29