Stockholders' Equity - Summary of Reserved Shares of Common Stock for Future Issuance (Details) - shares	Feb. 02, 2020	Jan. 31, 2019
Class of Stock [Line Items]
Shares underlying outstanding equity awards (in shares)	26,822,243	35,465,543
Shares reserved for future equity awards (in shares)	74,571,031
Employee stock purchase plan
Class of Stock [Line Items]
Shares reserved for future equity awards (in shares)	7,652,778
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Shares reserved for future equity awards (in shares)	25,434,597
Employee Stock Options
Class of Stock [Line Items]
Shares reserved for future equity awards (in shares)	14,661,413

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Aggregate number of common shares reserved for future issuance.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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