Stockholders' Equity - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended		1 Months Ended		6 Months Ended
	Jun. 05, 2013	Oct. 25, 2013	Oct. 26, 2012	Oct. 25, 2013	Oct. 26, 2012	Nov. 13, 2013 Subsequent Event	Jun. 05, 2013 Additional Paid-in Capital	Oct. 25, 2013 Additional Paid-in Capital	Oct. 25, 2013 Accelerated Share Repurchase Agreement	Oct. 25, 2013 Open Market Repurchase	Oct. 25, 2013 Retained Earnings	Oct. 25, 2013 Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of discount from quoted market price, employees entitled to buy shares (ESPP)				15.00%
Unrecognized compensation expense related to equity awards		$ 500,100,000		$ 500,100,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years				2 years 7 months 6 days
Stock repurchase program, authorized amount				7,100,000,000
Allocated amount of share repurchases				1,000,000,000				386,300,000	750,000,000	250,000,000	613,700,000
Treasury stock, retired during the period				104.3
Treasury stock, retired during the period								614,000,000			2,313,300,000	100,000
Prepayment to purchase shares of common stock	750,000,000
Repurchase of common stock, shares	19.2			25.3
Accelerated share repurchases, weighted-average price	$ 39.13
Value of forward contract							13,900,000
Cash dividend per share of common stock		$ 0.15	$ 0.00	$ 0.30	$ 0.00	$ 0.15
Total dividend paid		$ 102,700,000		$ 102,700,000	$ 0