Goodwill and Acquired Intangible Assets, Net - Acquired Intangible Assets (Details) $ in Thousands	12 Months Ended
Feb. 01, 2020 USD ($)
Business Acquisition [Line Items]
Weighted average remaining amortization period	6 years 5 months 4 days
Developed technologies
Business Acquisition [Line Items]
Weighted average remaining amortization period	6 years 4 months 28 days
Customer contracts and related relationships
Business Acquisition [Line Items]
Weighted average remaining amortization period	6 years 7 months 9 days
Aquantia and Avera
Business Acquisition [Line Items]
Acquired intangible assets	$ 572,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 572,000
Aquantia and Avera \| Developed technologies
Business Acquisition [Line Items]
Weighted average remaining amortization period	5 years 6 months 29 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 353,000
Aquantia and Avera \| IPR&D
Business Acquisition [Line Items]
Weighted average remaining amortization period	7 years 4 months 20 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 41,000
Aquantia and Avera \| Customer contracts and related relationships
Business Acquisition [Line Items]
Weighted average remaining amortization period	5 years 2 months 15 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 178,000

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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