Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 29, 2016	Apr. 24, 2015	Apr. 25, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	$ 53,230	$ 19,443	$ 18,671
Other comprehensive loss, net of tax	(684)	(587)	(105)
Balance	52,063	53,230	19,443
Unrealized Gain (Loss) on Available-for-Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	14	(6)
Other comprehensive (loss) income before reclassifications, before tax	(201)	169
Tax benefit (expense)	94	(60)
Other comprehensive (loss) income before reclassifications, net of tax	(107)	109
Reclassifications, before tax	(22)	(138)
Tax benefit (expense)	8	49
Reclassifications, net of tax	(14)	(89)
Other comprehensive loss, net of tax	(121)	20
Balance	(107)	14	(6)
Cumulative Translation Adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(277)	218
Other comprehensive (loss) income before reclassifications, before tax	(197)	(495)
Tax benefit (expense)	0	0
Other comprehensive (loss) income before reclassifications, net of tax	(197)	(495)
Reclassifications, before tax	0	0
Tax benefit (expense)	0	0
Reclassifications, net of tax	0	0
Other comprehensive loss, net of tax	(197)	(495)
Balance	(474)	(277)	218
Net Change in Retirement Obligations [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(1,131)	(765)
Other comprehensive (loss) income before reclassifications, before tax	(226)	(617)
Tax benefit (expense)	85	198
Other comprehensive (loss) income before reclassifications, net of tax	(141)	(419)
Reclassifications, before tax	114	78
Tax benefit (expense)	(39)	(25)
Reclassifications, net of tax	75	53
Other comprehensive loss, net of tax	(66)	(366)
Balance	(1,197)	(1,131)	(765)
Unrealized Gain (Loss) on Derivatives [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	210	(44)
Other comprehensive (loss) income before reclassifications, before tax	(145)	545
Tax benefit (expense)	51	(199)
Other comprehensive (loss) income before reclassifications, net of tax	(94)	346
Reclassifications, before tax	(327)	(145)
Tax benefit (expense)	121	53
Reclassifications, net of tax	(206)	(92)
Other comprehensive loss, net of tax	(300)	254
Balance	(90)	210	(44)
Total Accumulated Other Comprehensive (Loss) Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(1,184)	(597)	(492)
Other comprehensive (loss) income before reclassifications, before tax	(769)	(398)
Tax benefit (expense)	230	(61)
Other comprehensive (loss) income before reclassifications, net of tax	(539)	(459)
Reclassifications, before tax	(235)	(205)
Tax benefit (expense)	90	77
Reclassifications, net of tax	(145)	(128)
Other comprehensive loss, net of tax	(684)	(587)	(105)
Balance	$ (1,868)	$ (1,184)	$ (597)