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Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 26, 2020 | Jan. 27, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 88,857 | $ 201,961
Accumulated Amortization | (68,845) | (167,703)
Net Carrying Amount | 20,012 | 34,258
Core technologies |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 82,857 | 167,930
Accumulated Amortization | (63,434) | (136,544)
Net Carrying Amount | $ 19,423 | 31,386
Core technologies | Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life | 3 years |
Core technologies | Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life | 8 years |
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 6,000 | 34,031
Accumulated Amortization | (5,411) | (31,159)
Net Carrying Amount | $ 589 | $ 2,872
Customer relationships | Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life | 3 years |
Customer relationships | Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful life | 5 years |

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- Definition Finite-Lived Intangible Assets Excluding Fully Amortized Intangible Assets, Accumulated Amortization + References No definition available. + Details
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- Definition Finite-Lived Intangible Assets Excluding Fully Amortized Intangible Assets, Gross + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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