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Supplemental Financial Information - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 26, 2019 | Apr. 24, 2020 | Apr. 30, 2021 | Apr. 24, 2020 | Apr. 26, 2019
Property Plant And Equipment [Line Items] |  |  |  |  |
Net book value |  | $ 727 | $ 525 | $ 727 |
Cash proceeds from properties sold |  |  | 371 | 96 | $ 0
Lenovo NetApp Technology Limited (“LNTL”) |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Non-controlling equity interest, ownership percentage |  |  |  |  | 49.00%
Aggregate net book value of contributed assets |  |  | 7 |  |
Fair value of equity interest |  |  | 80 |  |
Gain on derecognition of assets |  |  | 73 |  |
Book value of investments |  | 67 | 71 | $ 67 |
Investments, other-than-temporary impairment charge |  | $ 10 |  |  |
Properties Sold |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Net book value |  |  | 210 |  |
Cash proceeds from properties sold |  |  | 365 |  |
Below market leases |  |  | 7 |  |
Gain on sale of properties, net of direct selling costs |  |  | $ 156 |  |
Land |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Net book value | $ 53 |  |  |  |
Cash proceeds from properties sold | 96 |  |  |  |
Gain on sale of properties, net of direct selling costs | $ 38 |  |  |  |

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