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Other Income (Expense), Net (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Oct. 30, 2015
Oct. 24, 2014
Oct. 30, 2015
Oct. 24, 2014
Nonoperating Income Expense [Abstract]        
Interest income $ 11 $ 8 $ 24 $ 16
Interest expense (12) (11) (23) (20)
Other income (expense), net 0 (1) 2 0
Total other income (expense), net $ (1) $ (4) $ 3 $ (4)