Equity - Schedule of Stock Reserved For Future Issuance (Details) - shares	Jul. 31, 2022	Jan. 31, 2022	Jan. 31, 2021
Class of Stock [Line Items]
Options issued and outstanding (in shares)	14,888,000	17,146,000
Shares available for issuance under Equity Incentive Plans (in shares)	21,870,000	18,248,000	4,796,000
Class A and Class B common stock
Class of Stock [Line Items]
Options issued and outstanding (in shares)		17,146,000
Shares reserved for issuance to charitable organizations (in shares)	1,636,000	1,636,000
Common stock reserved for future issuance (in shares)	50,817,000	43,581,000
Unvested RSUs and PSUs | Class A and Class B common stock
Class of Stock [Line Items]
Share-based compensation awards other than options (in shares)	7,972,000	3,280,000
Shares subject to the 2021 ESPP | Class A and Class B common stock
Class of Stock [Line Items]
Share-based compensation awards other than options (in shares)	4,451,000	3,271,000