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Stockholders' Equity - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 207 Months Ended |
--- | --- | --- | --- | ---
Aug. 24, 2020 | Jul. 31, 2020 | Jul. 26, 2019 | Jul. 31, 2020 | Apr. 24, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to equity awards |  | $ 435,000,000 |  | $ 435,000,000 |
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years |  | 2 years 8 months 12 days |  |  |
Stock repurchase program, authorized amount |  | $ 13,600,000,000 |  | $ 13,600,000,000 |
Repurchase of common stock, shares |  | 0 |  | 338,000,000 |
Average price of common stock repurchased under repurchase program |  |  |  | $ 38.86 |
Aggregate purchase price of common stock authorized under repurchase program |  | $ 0 | $ 250,000,000 | $ 13,100,000,000 |
Remaining authorized amount for stock repurchases under repurchase program |  | $ 477,000,000 |  | 477,000,000 |
Cash dividends declared, per common share |  | $ 0.48 | $ 0.48 |  |
Subsequent Event |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Cash dividends declared, per common share | $ 0.48 |  |  |  |
Cash dividend payable date | Oct. 28, 2020 |  |  |  |
Cash dividend record date | Oct. 09, 2020 |  |  |  |
Performance Based Restricted Stock Unit |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  | 3 years |  |  |
RSUs grant date fair value |  | $ 20,000,000 |  | $ 20,000,000 |
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] |  |  |  |  |
Number of options outstanding |  | 1,000,000 |  | 1,000,000 | 1,000,000
Percentage of Common stock issued to settle PBRSUs of target shares granted |  | 200.00% |  |  |

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