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Business Combinations Purchase Price Allocation (Details) - USD ($)
$ in Millions
Jul. 30, 2017
Oct. 30, 2016
Business Acquisition [Line Items]    
Goodwill $ 3,357 $ 3,316
2017 Acquisitions    
Business Acquisition [Line Items]    
Fair value of net assets acquired 17  
Goodwill 44  
Purchased technology 31  
Purchase price allocated $ 92