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Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Millions
3 Months Ended 6 Months Ended 173 Months Ended
Nov. 15, 2017
Oct. 27, 2017
Oct. 28, 2016
Oct. 27, 2017
Oct. 28, 2016
Oct. 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense related to equity awards   $ 269,000,000   $ 269,000,000   $ 269,000,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years       2 years 3 months 19 days    
Stock repurchase program, authorized amount   $ 9,600,000,000   $ 9,600,000,000   $ 9,600,000,000
Allocation of purchase price of share repurchases       $ 300,000,000    
Repurchase of common stock, shares       7   276
Average price of common stock repurchased under repurchase program       $ 41.80   $ 33.07
Aggregate purchase price of common stock authorized under repurchase program       $ 300,000,000 $ 292,000,000 $ 9,100,000,000
Cash dividends declared, per common share   $ 0.20 $ 0.19 $ 0.40 $ 0.38  
Subsequent Event            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Cash dividends declared, per common share $ 0.20          
Cash dividend payable date Jan. 24, 2018          
Cash dividend record date Jan. 05, 2018          
Additional Paid-in Capital            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Allocation of purchase price of share repurchases       $ 74,000,000    
Retained Earnings            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Allocation of purchase price of share repurchases       $ 226,000,000    
Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Common stock issued to settle PBRSUs of target shares granted       0.00%    
Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Common stock issued to settle PBRSUs of target shares granted       200.00%    
Performance Based Restricted Stock Unit            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
RSUs grant date fair value   $ 20,000,000   $ 20,000,000   $ 20,000,000
Performance Based Restricted Stock Unit | PBRSU One            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       2 years    
Performance Based Restricted Stock Unit | PBRSU Two            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       3 years