Stockholders' Equity (Narrative) (Details) (USD $)	12 Months Ended			107 Months Ended	12 Months Ended														12 Months Ended		12 Months Ended
	Apr. 27, 2012	Apr. 29, 2011	Apr. 30, 2010	Apr. 27, 2012	Apr. 27, 2012 Stock Options [Member]	Apr. 29, 2011 Stock Options [Member]	Apr. 30, 2010 Stock Options [Member]	Apr. 27, 2012 Restricted Stock Units [Member]	Apr. 29, 2011 Restricted Stock Units [Member]	Apr. 30, 2010 Restricted Stock Units [Member]	Apr. 27, 2012 Stock Option Exchange [Member]	Apr. 27, 2012 The 1999 Plan [Member]	Apr. 27, 2012 Employee Stock Purchase Plan [Member]	Apr. 29, 2011 Employee Stock Purchase Plan [Member]	Apr. 30, 2010 Employee Stock Purchase Plan [Member]	Apr. 27, 2012 ESPP Purchase Price Adjusmtent [Member]	Apr. 27, 2012 Bank Of America N.A. [Member]	Jul. 08, 2011 Bank Of America N.A. [Member]	Apr. 27, 2012 Wells Fargo [Member]	Aug. 19, 2011 Wells Fargo [Member]	Apr. 27, 2012 First Vesting Anniversary [Member]	Apr. 27, 2012 Minimum [Member]	Apr. 27, 2012 Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate								25.00%													25.00%
Vesting period					4 years						3 years 6 months
Number of months to vest ratably after the first anniversay of vesting commencement	36 months
Purchase price of common stock, percentage	100.00%
Options granted period term																						7 years	10 years
Number of shares authorized													38,700,000
Base number of shares used in calculation of authorized shares limit												8,900,000
Percentage of awards cancelled and returned to plan												50.00%
Percentage of number of shares added to plan												50.00%
Maximum initial value of performance units a participant may receive												$ 2,000,000
Additional shares authorized					7,700,000								3,500,000
Shares available for grant					14,800,000								4,900,000
Exchange exercise price											$ 22.00
Options cancelled in the Exchange			24,500,000
RSU issued in Exchange										3,200,000
Value of RSU								70,100,000
Incremental cost of RSU								5,800,000
Unrecognized compensation expense related to options, total					70,600,000			341,600,000					59,800,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years					2 years			2 years 8 months 12 days					1 year 7 months 6 days
Percentage of discount from quoted market price, employees entitled to buy shares (ESPP)	15.00%
Stock-based compensation	257,600,000	175,200,000	159,800,000		55,400,000	53,700,000	61,100,000	153,900,000	88,900,000	64,100,000			48,300,000	32,600,000	34,300,000	10,900,000
Repurchase and retirement of common stock, shares	14,600,000																4,100,000		10,500,000
Cumulative shares repurchased and shares repurchased and retired				119,000,000
Weighted-average price of common stock repurchased under repurchase program				$ 29.65
Aggregate purchase price of common stock authorized under repurchase program				3,500,000,000
Stock repurchase program, authorized amount	4,000,000,000
Common stock available under authorization of repurchase plan	500,000,000
Prepayment to purchase shares of common stock																		$ 200,000,000		$ 400,000,000
Accelerated share repurchases, weighted-average price																	$ 48.30		$ 38.08
Preferred Stock, Shares Authorized	5,000,000	5,000,000		5,000,000