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Amortizable Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jan. 31, 2021 | Jan. 26, 2020 | Jan. 27, 2019 | Apr. 27, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | $ 3,986 | $ 715 |  |
Accumulated Amortization | (1,249) | (666) |  |
Net Carrying Amount | 2,737 | 49 |  |
Amortization expense | 612 | 25 | $ 29 |
Future amortization expense associated with intangible assets |  |  |  |
Fiscal 2022 | 548 |  |  |
Fiscal 2023 | 545 |  |  |
Fiscal 2024 | 423 |  |  |
Fiscal 2025 | 367 |  |  |
Fiscal 2026 | 97 |  |  |
Fiscal 2027 and thereafter | 757 |  |  |
Mellanox Technologies, Ltd |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
IPR&D | 630 |  |  | $ 630
Acquisition-related intangible assets |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 3,280 | 195 |  |
Accumulated Amortization | (774) | (192) |  |
Net Carrying Amount | 2,506 | 3 |  |
Patents and licensed technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 706 | 520 |  |
Accumulated Amortization | (475) | (474) |  |
Net Carrying Amount | $ 231 | $ 46 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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