Equity Plans and Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 22, 2021	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of stock options granted (in dollars per share)		$ 10.90	$ 18.00	$ 16.84
Intrinsic value of stock options exercised		$ 48,300	$ 58,500	$ 93,200
Cost not yet recognized for unvested options		49,500
Stock-based compensation expense		$ 290,676	358,151	371,955
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)	15,500,000
Period of shares automatically increase	10 years
Percentage of total number of shares	1.00%
Number of shares authorized (in shares)		32,700,000
Weighted-average remaining period for unrecognized compensation expense for unvested awards		4 months 24 days
Unrecognized compensation expense		$ 2,700
Shares purchased (in shares)		1,400,000
Weighted average purchase price (in dollars per share)		$ 11.15
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining period for unrecognized compensation expense for unvested awards		2 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining period for unrecognized compensation expense for unvested awards		2 years 1 month 6 days
Intrinsic value of awards released		$ 178,800	$ 234,600	$ 329,600
Unrecognized compensation expense		$ 244,600
Awards granted (in shares)		16,822,000
Weighted-average grant date fair value of awards granted (in dollars per share)		$ 11.36
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Weighted-average remaining period for unrecognized compensation expense for unvested awards		2 years 2 months 12 days
Unrecognized compensation expense		$ 5,600
Awards granted (in shares)		700,000	0	100,000
Weighted-average grant date fair value of awards granted (in dollars per share)		$ 11.23		$ 18.08
Stock-based compensation expense				$ 0
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential payout percentage		0.00%
Maximum payout percentage		125.00%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential payout percentage		150.00%
Maximum payout percentage		150.00%
Class A Common Stock | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, offering date, percent of market price	85.00%
Purchase price of common stock, purchase date, percent of market price	85.00%
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of shares automatically increase	10 years
Percentage of total number of shares	5.00%
Vested options expiration period after termination of employment		3 months
2021 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period		10 years
2021 Plan | Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
2021 Plan | Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
2021 Plan | RSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
2021 Plan | RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
2021 Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)		229,800,000
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)		0
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)		0