Stockholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended			131 Months Ended	12 Months Ended												0 Months Ended	12 Months Ended				0 Months Ended
	Apr. 25, 2014	Apr. 26, 2013	Apr. 27, 2012	Apr. 25, 2014	Apr. 25, 2014 Accelerated Share Repurchase Agreement	Apr. 27, 2012 Accelerated Share Repurchase Agreement	Apr. 25, 2014 Open Market Repurchase	Apr. 25, 2014 Common Stock	Apr. 26, 2013 Common Stock	Apr. 27, 2012 Common Stock	Apr. 25, 2014 Additional Paid-in Capital	Apr. 26, 2013 Additional Paid-in Capital	Apr. 27, 2012 Additional Paid-in Capital	Apr. 25, 2014 Retained Earnings	Apr. 26, 2013 Retained Earnings	Apr. 27, 2012 Retained Earnings	Sep. 13, 2013 Employee Stock Purchase Plan	Apr. 25, 2014 Employee Stock Purchase Plan Period	Apr. 25, 2014 1999 Stock Option Plan	Apr. 25, 2014 1999 Stock Option Plan Restricted Stock Units	Apr. 25, 2014 1999 Stock Option Plan Stock Option	May 21, 2014 Subsequent Event Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percentage																					100.00%
Options granted period term																					7 years
Vesting rate																				25.00%
Option grant, vesting period																					4 years
Decrease in number of shares reserved for issuance for every share subject to a full value award																			2
Number of shares that may be granted to a participant in any calendar year																			1,000,000
Maximum initial value of performance units a participant may receive																			$ 5,000,000
Number of performance shares a participant may receive in a calendar year																			1,000,000
Additional shares authorized																	5,000,000		10,000,000
Shares available for grant																		7,400,000	17,800,000
Percentage of discount from quoted market price, employees entitled to buy shares (ESPP)																		15.00%
Share offering period for eligible employees																		24 months
Number of consecutive purchase periods																		4
Duration of purchase period																		6 months
Unrecognized compensation expense related to equity awards	385,600,000			385,600,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years	2 years 3 months 18 days
Stock repurchase program, authorized amount	1,600,000,000			7,100,000,000
Allocation of purchase price of share repurchases	1,881,500,000	590,000,000	600,000,000		750,000,000		1,131,500,000	100,000	0	0	813,400,000	176,200,000	125,900,000	1,068,000,000	413,800,000	474,100,000
Treasury stock, retired during the period, shares	104,300,000							(104,300,000)
Treasury stock, retired during the period	0							100,000			614,000,000			2,313,300,000
Repurchase of common stock, shares	47,300,000	18,100,000	14,600,000	184,300,000	19,200,000	14,600,000		47,300,000	18,100,000	14,600,000
Average price of common stock repurchased under repurchase program	$ 39.78	$ 32.68	$ 40.97	$ 32.55
Aggregate purchase price of common stock authorized under repurchase program				6,000,000,000
Prepayment to purchase shares of common stock	750,000,000		600,000,000	750,000,000
Accelerated share repurchases, weighted-average price	$ 39.13		$ 40.97
Value of forward contract											13,900,000		100,000
Preferred stock, shares authorized	5,000,000	5,000,000		5,000,000
Cash dividend per share of common stock	$ 0.60																					$ 0.165
Total dividend paid	$ 202,300,000	$ 0	$ 0								$ 50,400,000			$ 151,900,000
Cash dividend payable date																						Jul. 22, 2014
Cash dividend record date																						Jul. 10, 2014