Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2015	Oct. 24, 2014	Oct. 30, 2015	Oct. 24, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 520	$ 828	$ 1,340	$ 1,699
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on available-for-sale securities, net of tax (benefit) expense of $(41), $(19), $(115), and $13, respectively	(76)	(34)	(207)	20
Translation adjustment	(33)	(130)	(59)	(129)
Net change in retirement obligations, net of tax expense of $10, $6, $20, and $12, respectively	22	25	35	42
Unrealized (loss) gain on derivatives, net of tax (benefit) expense of $(13), $68, $(33), and $89, respectively	(28)	121	(56)	158
Other comprehensive (loss) income	(115)	(18)	(287)	91
Comprehensive income	$ 405	$ 810	$ 1,053	$ 1,790