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Acquisitions and Divestitures - Summary of Allocation of Total Purchase Consideration (Details)
$ in Millions
3 Months Ended
Oct. 26, 2019
USD ($)
acquisition
Business Combinations [Abstract]  
Purchase Consideration $ 182
Net Tangible Assets Acquired (Liabilities Assumed) (9)
Purchased Intangible Assets 108
Goodwill $ 83
Number of business combinations (acquisition) | acquisition 4