Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current, Federal	$ 22	$ 180	$ 104
Current, State	3	14	12
Current, Foreign	41	35	40
Total current	66	229	156
Deferred, Federal	75	(91)	8
Deferred, State	18	(17)	(3)
Deferred, Foreign	(3)	(5)	(8)
Total deferred	90	(113)	(3)
Provision for income taxes	$ 156	$ 116	$ 153