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Other Income (Expense), Net (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jan. 29, 2016
Jan. 23, 2015
Jan. 29, 2016
Jan. 23, 2015
Nonoperating Income Expense [Abstract]        
Interest income $ 11 $ 9 $ 35 $ 25
Interest expense (11) (11) (34) (31)
Other expense, net (2) 0 0 0
Total other income (expense), net $ (2) $ (2) $ 1 $ (6)