Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jul. 25, 2014	Jul. 26, 2013
Numerator:
Net earnings	$ 871	$ 953
Denominator
Basic weighted average shares outstanding (shares)	992.6	1,009.7
Effect of dilutive securities:
Employee stock options (shares)	7.5	6.6
Employee restricted stock units (shares)	5.0	4.8
Other (shares)	0.1	0.1
Diluted weighted average shares outstanding (shares)	1,005.2	1,021.2
Basic earnings per share:
Net earnings (usd per share)	$ 0.88	$ 0.94
Diluted earnings per share:
Net earnings (usd per share)	$ 0.87	$ 0.93
Stock Options
Diluted earnings per share:
Antidilutive securities excluded from computation of earnings per share (shares)		9