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Purchased Intangible Assets, Net - Future Amortization Expense Related to Purchased Intangible Assets (Detail) - USD ($)
$ in Millions
Jul. 29, 2016
Apr. 29, 2016
Acquired Finite Lived Intangible Assets [Line Items]    
Net Assets $ 169 $ 180
Intangible Assets Subject to Amortization    
Acquired Finite Lived Intangible Assets [Line Items]    
Remainder of 2017 34  
2018 43  
2019 35  
2020 23  
2021 15  
Net Assets $ 150 $ 161