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Other Expense, Net (Detail) - USD ($)
$ in Millions
12 Months Ended
Apr. 28, 2017
Apr. 29, 2016
Apr. 24, 2015
Nonoperating Income Expense [Abstract]      
Interest income $ 44 $ 46 $ 37
Interest expense (52) (49) (42)
Other income, net 8 0 2
Total other expense, net $ 0 $ (3) $ (3)