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Business Combinations - Summary of Preliminary Acquisition Date Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions | Apr. 24, 2020 | Mar. 06, 2020 | May 23, 2019 | Apr. 26, 2019 | Apr. 27, 2018
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Goodwill | $ 1,778 |  |  | $ 1,735 | $ 1,739
Talon Storage Solutions, Inc. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash |  | $ 2 |  |  |
Other assets |  | 4 |  |  |
Goodwill |  | 13 |  |  |
Total assets acquired |  | 29 |  |  |
Liabilities assumed |  | (6) |  |  |
Total purchase price |  | 23 |  |  |
Talon Storage Solutions, Inc. | Developed Technology |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible asset |  | 6 |  |  |
Talon Storage Solutions, Inc. | Customer Contracts/Relationships |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible asset |  | $ 4 |  |  |
Cognigo Research Limited |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash |  |  | $ 2 |  |
Goodwill |  |  | 30 |  |
Total assets acquired |  |  | 58 |  |
Liabilities assumed |  |  | (5) |  |
Total purchase price |  |  | 53 |  |
Cognigo Research Limited | Developed Technology |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible asset |  |  | $ 26 |  |

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