Equity Incentive Plans - Narrative (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2023 USD ($) shares	Nov. 05, 2023 USD ($) purchasePeriod shares	Nov. 06, 2022 USD ($)	Nov. 05, 2023 USD ($) plan purchasePeriod $ / shares shares	Nov. 06, 2022 USD ($)	Mar. 20, 2028 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans | plan				2
Equity awards expiration period (no later than)				10 years
Total stock-based compensation expense		$ 87,966,000	$ 86,979,000	$ 255,243,000	$ 245,114,000
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, target (as a percent)				100.00%
Granted (in shares) | shares				1,600,000
Long-Term Performance Incentive RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation not yet recognized	$ 73,900,000
Total stock-based compensation expense		3,900,000		$ 6,300,000
Unrecognized stock-based compensation expense		$ 67,600,000		$ 67,600,000
Compensation cost (in years)		4 years 4 months 24 days
Granted (in shares) | shares	4,200,000
Post-vesting holding period	1 year
Granted (in dollars per share) | $ / shares				$ 17.56
Volatility rate (percent)				51.80%
Risk-free interest rate (percent)				3.86%
Expected term				5 years
Post-vesting holding period discount rate (percent)				14.90%
Unvested awards (in shares) | shares		4,200,000		4,200,000
2015 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan offering period				24 months
Number of purchase periods | purchasePeriod		4		4
Purchase period, term				6 months
ESPP modification charge				$ 16,700,000
Total stock-based compensation expense		$ 7,100,000	$ 5,500,000	19,700,000	$ 17,300,000
Unrecognized stock-based compensation expense		$ 40,800,000		$ 40,800,000
Compensation cost (in years)				1 year 4 months 24 days
2015 Employee Stock Purchase Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payroll deductions percentage		30.00%		30.00%
Share cap for ESPP at purchase date (in shares) | shares		3,000		3,000
Dollar cap per purchase period				$ 7,500
Calendar year gap for ESPP contribution amount				$ 25,000
Purchase price as percentage of fair market value of common stock				85.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				2 years
Minimum | PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, target (as a percent)				0.00%
Minimum | Long-Term Performance Incentive RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				4 years
Maximum | PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, target (as a percent)				150.00%
Maximum | Long-Term Performance Incentive RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years
Maximum | Long-Term Performance Incentive RSUs | Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target market capitalization						$ 21,000,000,000