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Other Income (Expense), Net (Detail) - USD ($)
$ in Millions
3 Months Ended
Jul. 28, 2017
Jul. 29, 2016
Nonoperating Income Expense [Abstract]    
Interest income $ 16 $ 11
Interest expense (13) (15)
Other income, net 2 3
Total other income (expense), net $ 5 $ (1)