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Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions |  | 3 Months Ended | 9 Months Ended | 176 Months Ended
--- | --- | --- | --- | ---
Feb. 14, 2018 | Jan. 26, 2018 | Jan. 27, 2017 | Jan. 26, 2018 | Jan. 27, 2017 | Jan. 26, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation expense related to equity awards |  | $ 239,000,000 |  | $ 239,000,000 |  | $ 239,000,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years |  |  |  | 2 years 2 months 12 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 |  |  |  | $ 450,000,000 |  |
Repurchase of common stock, shares |  |  |  | 10 |  | 279
Average price of common stock repurchased under repurchase program |  |  |  | $ 46.37 |  | $ 33.31
Aggregate purchase price of common stock authorized under repurchase program |  |  |  | $ 450,000,000 | $ 576,000,000 | $ 9,300,000,000
Cash dividends declared, per common share |  | $ 0.20 | $ 0.19 | $ 0.60 | $ 0.57 |
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 | Apr. 25, 2018 |  |  |  |  |
Cash dividend record date | Apr. 06, 2018 |  |  |  |  |
Additional Paid-in Capital |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Allocation of purchase price of share repurchases |  |  |  | $ 224,000,000 |  |
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 |  |

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