Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Apr. 24, 2015	Jan. 23, 2015	Oct. 24, 2014	Jul. 25, 2014	Apr. 25, 2014	Jan. 24, 2014	Oct. 25, 2013	Jul. 26, 2013	Apr. 24, 2015	Apr. 25, 2014	Apr. 26, 2013
Quarterly Financial Data [Abstract]
Net Sales	$ 7,304	$ 4,318	$ 4,366	$ 4,273	$ 4,566	$ 4,163	$ 4,194	$ 4,083	$ 20,261	$ 17,005	$ 16,590
Gross Profit	4,370	3,190	3,224	3,168	3,395	3,113	3,104	3,061	13,952	12,672
Net Income (Loss)	$ (1)	$ 977	$ 828	$ 871	$ 448	$ 762	$ 902	$ 953	$ 2,675	$ 3,065	$ 3,467
Basic earnings per share:
Basic Earnings per Share (in dollars per share)	$ 0.00	$ 0.99	$ 0.84	$ 0.88	$ 0.45	$ 0.76	$ 0.90	$ 0.94	$ 2.44	$ 3.06	$ 3.40
Diluted earnings per share:
Diluted Earnings per Share (in dollars per share)	$ 0.00	$ 0.98	$ 0.83	$ 0.87	$ 0.44	$ 0.75	$ 0.89	$ 0.93	$ 2.41	$ 3.02	$ 3.37