Stock Purchase and Award Plans , Stock Options Activity (Details) - Stock Options [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Apr. 29, 2016	Apr. 24, 2015	Apr. 25, 2014
Stock Option Activity
Outstanding (in shares)	62,021
Granted (in shares)	5,785
Exercised (in shares)	(11,103)
Expired/Forfeited (in shares)	(3,733)
Outstanding (in shares)	52,970	62,021
Options, Vested and expected to vest (in shares)	25,542
Options, Exercisable (in shares)	23,383
Stock Option Activity
Outstanding (in dollars per share)	$ 53.27
Granted (in dollars per share)	77.76
Exercised (in dollars per share)	41.99
Expired/Forfeited (in dollars per share)	70.62
Outstanding (in dollars per share)	57.09	$ 53.27
Weighted Average Exercise Price, Vested and expected to vest (in dollars per share)	69.91
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 40.14
Weighted Average Remaining Contractual Term, Outstanding	6 years 5 months 19 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	8 years 5 months 23 days
Weighted Average Remaining Contractual Term, Exercisable	3 years 10 months 24 days
Aggregate Intrinsic Value, Outstanding	$ 1,168
Aggregate Intrinsic Value, Vested and expected to vest	236
Aggregate Intrinsic Value, Exercisable	912
Cash proceeds from options exercised	452	$ 609	$ 1,273
Intrinsic value of options exercised	374	329	249
Tax benefit related to options exercised	$ 131	$ 106	$ 78