Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 24, 2014	Jan. 25, 2013	Jan. 24, 2014	Jan. 25, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 762	$ 988	$ 2,617	$ 2,498
Other comprehensive income/(loss), net of tax:
Unrealized loss on available-for-sale securities, net of tax benefit of $(34), $(19), $(71), and $(15), respectively	(63)	(33)	(127)	(26)
Translation adjustment	(50)	40	1	13
Net change in retirement obligations, net of tax expense of $8, $7, $25, and $26, respectively	14	10	43	45
Unrealized gain (loss) on derivatives, net of tax expense (benefit) of $27, $(2), $(25), and $(18), respectively	48	(5)	(43)	(31)
Other comprehensive (loss) income, net of tax	(51)	12	(126)	1
Comprehensive income	$ 711	$ 1,000	$ 2,491	$ 2,499