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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 8 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Apr. 24, 2020 | Apr. 26, 2019 | Apr. 27, 2018 | Jan. 25, 2019 | Apr. 28, 2017
Income Tax Contingency [Line Items] |  |  |  |  |  |
U.S. federal corporate tax rate | 35.00% | 21.00% |  |  |  |
Discrete tax expense on deferred tax assets and liabilities |  |  |  | $ 108 |  |
Tax expense related to deferred tax assets for equity-based compensation awards |  | $ 15 | $ 16 |  | $ 6 |
Percentage of transition tax on accumulated foreign earnings and profits, due to TCJA |  | 15.50% |  |  |  |
Percentage of transition tax on remaining foreign earnings due to TCJA |  | 8.00% |  |  |  |
Discrete tax expense for the estimated U.S. federal and state income tax impacts of the transition tax |  |  |  | 732 |  |
Reduction in provisional estimate due to TCJA |  |  | 5 |  |  |
Global minimum tax expense for federal and state impacts |  | $ 32 | 22 | 0 |  |
Deferred tax assets, decrease in valuation allowance |  | $ 19 |  |  |  |
Operating loss and credit carryforwards, expiration dates range, minimum |  | 2021 |  |  |  |
Operating loss and credit carryforwards, expiration dates range, maximum |  | 2038 |  |  |  |
Gross unrecognized tax benefits |  | $ 211 | 296 | 348 |  | $ 218
Gross unrecognized tax benefits included in other long-term liabilities |  | 136 | 252 |  |  |
Unrecognized tax benefits that would affect provision for income taxes |  | 136 |  |  |  |
Provisional gross unrecognized tax benefits |  |  |  | 114 |  |
Tax penalties and interest on unrecognized tax benefits |  | 8 | 4 | $ 5 |  |
Accrued tax penalties and interest on unrecognized tax benefits |  | 10 | $ 18 |  |  |
Federal Income Tax |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Operating loss carry forwards |  | 1 |  |  |  |
Tax credit carry forward amount |  | 2 |  |  |  |
State and Local Income Tax |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Operating loss carry forwards |  | 26 |  |  |  |
Tax credit carry forward amount |  | 131 |  |  |  |
Foreign Income Tax |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Operating loss carry forwards |  | 3 |  |  |  |
Tax credit carry forward amount |  | $ 23 |  |  |  |
Staff Accounting Bulletin 118 |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Maximum measurement period due to TCJA |  | 1 year |  |  |  |

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