Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2015	Jul. 25, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 820	$ 871
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on available-for-sale securities, net of tax (benefit) expense of $(74) and $32, respectively	(131)	54
Translation adjustment	(26)	1
Net change in retirement obligations, net of tax expense of $10 and $6, respectively	13	17
Unrealized (loss) gain on derivatives, net of tax (benefit) expense of $(20) and $21, respectively	(28)	37
Other comprehensive (loss) income, net of tax	(172)	109
Comprehensive income	$ 648	$ 980