Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 25, 2013	Jan. 27, 2012	Jan. 25, 2013	Jan. 27, 2012
Statement of Other Comprehensive Income [Abstract]
Net earnings	$ 988	$ 935	$ 2,498	$ 2,626
Other comprehensive income/(loss), net of tax:
Unrealized gain/(loss) on investments, net of tax expense/(benefit) of $(19), $(89), $(15), and $(61), respectively	(33)	(150)	(26)	(102)
Translation adjustment	40	(85)	13	(168)
Net change in retirement obligations, net of tax expense of $7, $6, $26 and $18, respectively	10	15	45	38
Unrealized gain/(loss) on derivatives, net of tax expense/(benefit) of $(2), $59, $(18) and $106, respectively	(5)	101	(31)	181
Other comprehensive income/(loss)	12	(119)	1	(51)
Comprehensive income	$ 1,000	$ 816	$ 2,499	$ 2,575