Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jul. 31, 2015	Jul. 25, 2014
Numerator:
Net income attributable to ordinary shareholders	$ 820	$ 871
Denominator
Basic weighted average shares outstanding (shares)	1,418.1	992.6
Effect of dilutive securities:
Employee stock options (shares)	13.2	7.5
Employee restricted stock units (shares)	5.0	5.0
Other (shares)	0.1	0.1
Diluted weighted average shares outstanding (shares)	1,436.4	1,005.2
Basic earnings per share:
Net earnings (usd per share)	$ 0.58	$ 0.88
Diluted earnings per share:
Net earnings (usd per share)	$ 0.57	$ 0.87
Stock Options
Diluted earnings per share:
Antidilutive securities excluded from computation of earnings per share (shares)	1.0	0.0