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Business Combinations - Preliminary Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Millions
Apr. 28, 2017
Apr. 29, 2016
Apr. 24, 2015
Business Acquisition [Line Items]      
Goodwill $ 1,684 $ 1,676 $ 1,027
SolidFire | Fiscal 2016 Acquisitions      
Business Acquisition [Line Items]      
Cash   8  
Intangible assets   168  
Goodwill   649  
Other assets   56  
Total assets acquired   881  
Liabilities assumed   (31)  
Total purchase price   $ 850