Stockholders' Equity - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended		0 Months Ended	1 Months Ended	9 Months Ended
	Jun. 05, 2013	Jan. 24, 2014	Jan. 25, 2013	Jan. 24, 2014	Jan. 25, 2013	Feb. 12, 2014 Subsequent Event	Jun. 05, 2013 Additional Paid-in Capital	Jan. 24, 2014 Additional Paid-in Capital	Jan. 24, 2014 Accelerated Share Repurchase Agreement	Jan. 24, 2014 Open Market Repurchase	Jan. 24, 2014 Retained Earnings	Jan. 24, 2014 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		$ 449,300,000		$ 449,300,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years				2 years 6 months
Stock repurchase program, authorized amount				7,100,000,000
Allocated amount of share repurchases				1,507,000,000				585,700,000	750,000,000	757,000,000	921,300,000
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			37.6
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	$ 0.45	$ 0.00	$ 0.15
Total dividend paid				$ 153,100,000	$ 0			$ 50,400,000			$ 102,700,000