Equity Incentive Plans - Additional Information (Details)					1 Months Ended		9 Months Ended
	Aug. 01, 2021 shares	Aug. 01, 2020 shares	Dec. 13, 2019 USD ($) PurchasePeriod shares	Dec. 13, 2019 USD ($) PurchasePeriod shares	Oct. 31, 2021 $ / shares shares	Dec. 31, 2020 $ / shares shares	Apr. 30, 2022 USD ($) Plan $ / shares shares	Apr. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans | Plan							3
Shares reserved for future issuance (in shares)							41,600,000
Number of shares available for grant (in shares)							16,400,000
Grants in period (in shares)							0
Exercises in period (in shares)							2,400,000
Weighted average exercise price (in dollars per share) | $ / shares							$ 5.47
Options outstanding (in shares)							900,000
Outstanding options, weighted average exercise price (in dollars per share) | $ / shares							$ 4.48
Contractual term							1 year 8 months 12 days
Options outstanding, intrinsic value | $							$ 47,700,000
Monetary cap | $			$ 25,000	$ 25,000
Share cap (in shares)				1,000
Offering period duration (in months)				12 months
Number of six-month purchase periods | PurchasePeriod			2	2
Proceeds from stock plans | $							66,644,000	$ 62,343,000
Compensation not yet recognized | $							$ 668,300,000
Period for recognition (in years)							2 years 6 months
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							13,059,000
Granted (in dollars per share) | $ / shares							$ 33.90
Common Class A | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)			11,500,000	11,500,000
Number of additional shares authorized			9,200,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)							2,400,000
Percent of eligible compensation (up to)			15.00%	15.00%
Purchase price of common stock, percent			85.00%
ESPP stock issued during period (in shares)							2,800,000
2016 Plan | Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)							22,400,000
Annual increase (in shares)							18,000,000.0
Annual increase, percent of outstanding shares							5.00%
Number of additional shares authorized	10,700,000	10,100,000
2016 Plan | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock plans | $							$ 62,600,000
Market Stock Units | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)					400,000	703,117
Granted (in dollars per share) | $ / shares					$ 46.20	$ 35.69
Vesting percentage					200.00%	133.00%
Award vesting period					2 years 9 months 18 days	4 years
Modified Market Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments outstanding (in shares)							1,200,000
Modified Market Stock Units | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)						75,000
Granted (in dollars per share) | $ / shares						$ 27.54
Award vesting period						3 years 10 months 24 days