Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 24, 2014	Oct. 25, 2013	Oct. 24, 2014	Oct. 25, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 828	$ 902	$ 1,699	$ 1,855
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on available-for-sale securities, net of tax (benefit) expense of $(19), $17, $13, and $(37), respectively	(34)	31	20	(64)
Translation adjustment	(130)	62	(129)	57
Net change in retirement obligations, net of tax expense of $6, $8, $12, and $17, respectively	25	9	42	23
Unrealized gain (loss) on derivatives, net of tax expense (benefit) of $68, $(53), $89, and $(52), respectively	121	(93)	158	(91)
Other comprehensive income (loss), net of tax	(18)	9	91	(75)
Comprehensive income	$ 810	$ 911	$ 1,790	$ 1,780