Convertible Preferred Stock and Stockholders' Equity (Deficit) - Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, shares in Thousands	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Class of Stock [Line Items]
Shares Authorized (in shares)			297,973
Shares Issued (in share)			294,257
Shares Outstanding (in shares)		0	294,257	282,108
Carrying Value Net of Issuance Costs	$ 0	$ 0	$ 1,221,968,000	$ 996,389,000
Aggregate Liquidation Preference			$ 1,223,936,000
A-1
Class of Stock [Line Items]
Shares Authorized (in shares)			96,825
Shares Issued (in share)			96,825
Shares Outstanding (in shares)			96,825
Original Issue Price per Share (in dollars per share)			$ 0.31
Carrying Value Net of Issuance Costs			$ 29,523,000
Aggregate Liquidation Preference			$ 29,633,000
A-2
Class of Stock [Line Items]
Shares Authorized (in shares)			48,000
Shares Issued (in share)			48,000
Shares Outstanding (in shares)			48,000
Original Issue Price per Share (in dollars per share)			$ 0.03
Carrying Value Net of Issuance Costs			$ 1,600,000
Aggregate Liquidation Preference			$ 1,600,000
B-1
Class of Stock [Line Items]
Shares Authorized (in shares)			43,734
Shares Issued (in share)			43,734
Shares Outstanding (in shares)			43,734
Original Issue Price per Share (in dollars per share)			$ 2.70
Carrying Value Net of Issuance Costs			$ 117,592,000
Aggregate Liquidation Preference			$ 118,000,000
B-2
Class of Stock [Line Items]
Shares Authorized (in shares)			12,972
Shares Issued (in share)			12,972
Shares Outstanding (in shares)			12,972
Original Issue Price per Share (in dollars per share)			$ 2.70
Carrying Value Net of Issuance Costs			$ 34,880,000
Aggregate Liquidation Preference			$ 35,000,000
C-1
Class of Stock [Line Items]
Shares Authorized (in shares)			19,626
Shares Issued (in share)			19,626
Shares Outstanding (in shares)			19,626
Original Issue Price per Share (in dollars per share)			$ 6.38
Carrying Value Net of Issuance Costs			$ 124,969,000
Aggregate Liquidation Preference			$ 125,200,000
C-2
Class of Stock [Line Items]
Shares Authorized (in shares)			16,459
Shares Issued (in share)			16,459
Shares Outstanding (in shares)			16,459
Original Issue Price per Share (in dollars per share)			$ 6.38
Carrying Value Net of Issuance Costs			$ 104,816,000
Aggregate Liquidation Preference			$ 105,000,000
D-1
Class of Stock [Line Items]
Shares Authorized (in shares)			34,504
Shares Issued (in share)			34,504
Shares Outstanding (in shares)			34,504
Original Issue Price per Share (in dollars per share)			$ 13.12
Carrying Value Net of Issuance Costs			$ 452,140,000
Aggregate Liquidation Preference			$ 452,600,000
D-2
Class of Stock [Line Items]
Shares Authorized (in shares)			9,987
Shares Issued (in share)			9,987
Shares Outstanding (in shares)			9,987
Original Issue Price per Share (in dollars per share)			$ 13.12
Carrying Value Net of Issuance Costs			$ 130,869,000
Aggregate Liquidation Preference			$ 131,000,000
E
Class of Stock [Line Items]
Shares Authorized (in shares)			15,866
Shares Issued (in share)			12,150
Shares Outstanding (in shares)			12,150
Original Issue Price per Share (in dollars per share)			$ 18.59
Carrying Value Net of Issuance Costs			$ 225,579,000
Aggregate Liquidation Preference			$ 225,903,000