CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock and Additional Paid-in Capital	Common Stock and Additional Paid-in Capital Put Option	Common Stock and Additional Paid-in Capital Warrant	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balances at Apr. 26, 2013	$ 4,718	$ 4,740			$ (2,927)	$ 2,896	$ 9
Balances (in shares) at Apr. 26, 2013					(104)
Balances (in shares) at Apr. 26, 2013		461
Net income	638	$ 0			$ 0	638	0
Other comprehensive income (loss)	0	$ 0			$ 0	0	0
Issuance of common stock under employee stock award plans, net of taxes (in shares)		13			0
Issuance of common stock under employee stock award plans, net of taxes	$ 201	$ 201			$ 0	0	0
Conversion of convertible notes		5			0
Exercise of convertible note hedges and warrants			(4)	1
Repurchase of common stock and forward contract, shares	(47)	(47)			0
Repurchase of common stock and forward contract	$ (1,881)	$ (813)			$ 0	(1,068)	0
Retirement of treasury stock (in shares)		(104)			104
Retirement of treasury stock	0	$ (614)			$ 2,927	(2,313)	0
Stock-based compensation	273	273			0	0	0
Income tax benefit from employee stock transactions	40	40			0	0	0
Cash dividends declared ($0.60, $0.66 and $0.72 per common share)	(202)	(50)			0	(152)	0
Balances at Apr. 25, 2014	3,787	$ 3,777			$ 0	1	9
Balances (in shares) at Apr. 25, 2014					0
Balances (in shares) at Apr. 25, 2014		325
Net income	560	$ 0			$ 0	560	0
Other comprehensive income (loss)	(33)	$ 0			$ 0	0	(33)
Issuance of common stock under employee stock award plans, net of taxes (in shares)		11			0
Issuance of common stock under employee stock award plans, net of taxes	$ 157	$ 157			$ 0	0	0
Repurchase of common stock and forward contract, shares	(30)	(30)			0
Repurchase of common stock and forward contract	$ (1,165)	$ (813)			$ 0	(352)	0
Stock-based compensation	259	259			0	0	0
Income tax benefit from employee stock transactions	57	57			0	0	0
Cash dividends declared ($0.60, $0.66 and $0.72 per common share)	(208)	(52)			0	(156)	0
Balances at Apr. 24, 2015	$ 3,414	$ 3,385			$ 0	53	(24)
Balances (in shares) at Apr. 24, 2015					0
Balances (in shares) at Apr. 24, 2015	306	306
Net income	$ 229	$ 0			$ 0	229	0
Other comprehensive income (loss)	(7)	$ 0			$ 0	0	(7)
Issuance of common stock under employee stock award plans, net of taxes (in shares)		8			0
Issuance of common stock under employee stock award plans, net of taxes	$ 70	$ 70			$ 0	0	0
Repurchase of common stock and forward contract, shares	(33)	(33)			0
Repurchase of common stock and forward contract	$ (960)	$ (763)			$ 0	(197)	0
Stock-based compensation	260	260			0	0	0
Income tax benefit from employee stock transactions	59	59			0	0	0
Income tax adjustments on other equity transactions	26	26			0	0	0
Cash dividends declared ($0.60, $0.66 and $0.72 per common share)	(210)	(125)			0	(85)	0
Balances at Apr. 29, 2016	$ 2,881	$ 2,912			$ 0	$ 0	$ (31)
Balances (in shares) at Apr. 29, 2016					0
Balances (in shares) at Apr. 29, 2016	281	281