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Goodwill (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Jan. 31, 2021 | Jan. 26, 2020 | Jan. 27, 2019 | Apr. 27, 2020
Goodwill [Line Items] |  |  |  |
Goodwill impairment loss | $ 0 | $ 0 | $ 0 |
Goodwill | 4,193,000,000 | 618,000,000 |  |
Goodwill acquired during period | 3,570,000,000 |  |  |
Mellanox Technologies, Ltd |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  |  | $ 3,431,000,000
Goodwill acquired during period | 3,430,000,000 |  |  |
Individually Immaterial Acquisitions |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill acquired during period | 143,000,000 |  |  |
Graphics |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 347,000,000 | 347,000,000 |  |
Compute & Networking |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | $ 3,850,000,000 | $ 271,000,000 |  |

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