Employee Stock Plans - Narrative (Details) shares in Millions	9 Months Ended
Oct. 31, 2022 purchase_period shares
2018 Equity Incentive Plan \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved and available for issuance (in shares)	26.7
2018 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP offering period (in months)	24 months
Number of purchase periods in offering period \| purchase_period	4
Term of purchase period (in months)	6 months
Purchase price, percentage of fair market value	85.00%
2018 ESPP \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved and available for issuance (in shares)	4.6
Stock Options and RSUs \| 2006 Stock Plan and 2015 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate equity awards outstanding (in shares)	4.3

Aggregate number of common shares reserved for future issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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