Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Apr. 29, 2016	Jan. 29, 2016	Oct. 30, 2015	Jul. 31, 2015	Apr. 24, 2015	Jan. 23, 2015	Oct. 24, 2014	Jul. 25, 2014	Apr. 29, 2016	Apr. 24, 2015	Apr. 25, 2014
Quarterly Financial Data [Abstract]
Net Sales	$ 7,567	$ 6,934	$ 7,058	$ 7,274	$ 7,304	$ 4,318	$ 4,366	$ 4,273	$ 28,833	$ 20,261	$ 17,005
Gross Profit	5,204	4,793	4,876	4,818	4,370	3,190	3,224	3,168	19,691	13,952
Net Income (Loss)	$ 1,104	$ 1,095	$ 520	$ 820	$ (1)	$ 977	$ 828	$ 871	$ 3,538	$ 2,675	$ 3,065
Basic earnings per share:
Basic Earnings per Share (in dollars per share)	$ 0.79	$ 0.78	$ 0.37	$ 0.58	$ 0.00	$ 0.99	$ 0.84	$ 0.88	$ 2.51	$ 2.44	$ 3.06
Diluted earnings per share:
Diluted Earnings per Share (in dollars per share)	$ 0.78	$ 0.77	$ 0.36	$ 0.57	$ 0.00	$ 0.98	$ 0.83	$ 0.87	$ 2.48	$ 2.41	$ 3.02