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Acquisitions and Divestitures - Additional Information (Details)
$ in Millions
3 Months Ended
Oct. 30, 2021
USD ($)
acquisition
Oct. 24, 2020
USD ($)
Business Acquisition [Line Items]    
Number of acquisitions | acquisition 1  
Acquired cash and cash equivalents $ 6  
General and administrative    
Business Acquisition [Line Items]    
Acquisition related costs $ 19 $ 4