Stock-based Compensation - Narrative (Details)				1 Months Ended			12 Months Ended
	May 01, 2023 USD ($) tranche	Apr. 01, 2022 USD ($) shares	Feb. 14, 2022 shares	Feb. 29, 2024 shares	Jan. 31, 2024 shares	Sep. 30, 2019 USD ($) shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options unrecognized stock-based compensation expense | $							$ 5,000,000
Stock-based compensation | $							281,364,000	$ 208,700,000	$ 93,447,000
Stock-based compensation expense | $							$ 273,989,000	$ 202,777,000	90,137,000
2019 Equity Incentive Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)										66,661,953
Number of new shares authorized for issuance (in shares)										29,335,000
Number of additional shares authorized for issuance (in shares)										37,326,953
2019 Equity Incentive Plan | Class A and Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential increase in number of shares authorized, as a percentage of total common stock outstanding										5.00%
2010 Plan And 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested options exercisable (in shares)							401,212	2,728,545
Total grant date fair value for vested options | $							$ 15,500,000	$ 12,500,000	$ 14,000,000
Stock options issued and outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							4 years
Expiration period							10 years
Weighted-average remaining vesting period							1 year 7 months 6 days
Weighted-average grant date fair value for options granted (in dollars per share) | $ / shares									$ 90.50
Stock options issued and outstanding | Area 1 Security, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Stock-based compensation expense | $		$ 1,400,000					$ 0
Stock options issued and outstanding | Class A common stock | Area 1 Security, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (in shares)		156,770
Stock options issued and outstanding | 2010 Equity Incentive Plan | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of common stock, percentage of fair market value							100.00%
Stock options issued and outstanding | 2010 Equity Incentive Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise stock option awards (in shares)							1
Stock options issued and outstanding | 2010 Equity Incentive Plan | Class B common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise stock option awards (in shares)							1
Stock options issued and outstanding | 2019 Equity Incentive Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise stock option awards (in shares)							1
Stock options issued and outstanding | 2010 Plan And 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options unrecognized stock-based compensation expense | $							$ 195,800,000
Weighted-average remaining vesting period							4 years 3 months 18 days
Stock options with market conditions | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
Stock options with market conditions | Other Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
Other performance awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining vesting period							4 years 4 months 24 days
Granted (in dollars per share) | $ / shares							$ 52.13	$ 55.80
Stock-based compensation expense | $							$ 33,500,000	$ 39,500,000
Unrecognized stock-based compensation expense | $							$ 187,900,000
Other performance awards | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting during period (in shares)					224,250
Other performance awards | Subsequent Event | Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting during period (in shares)				37,000
Other performance awards | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
Other performance awards | Other Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
Other performance awards | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)			5,575,000
Expiration period			10 years
Number of separate tranches | tranche	9
Stock-based compensation | $	$ 25,800,000
Other performance awards | Class A common stock | Other Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)							1,290,000
Outstanding and unsettled RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							4 years
Weighted-average remaining vesting period							2 years 10 months 24 days
Number of shares granted (in shares)							6,428,000	6,367,000	2,203,000
Granted (in dollars per share) | $ / shares							$ 62.24	$ 67.13	$ 108.87
Stock-based compensation expense | $							$ 219,600,000	$ 137,400,000	$ 71,700,000
Total grant date fair value for vested shares | $							209,400,000	$ 109,600,000	$ 57,900,000
Unrecognized stock-based compensation expense | $							$ 635,700,000
ESPP | 2019 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining vesting period							4 months 24 days
Unrecognized stock-based compensation expense | $							$ 3,200,000
Maximum ownership percentage threshold for participation						5.00%
Maximum contribution percentage per employee						10.00%
ESPP | 2019 Employee Stock Purchase Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares allowable under the plan (in shares)						5,870,000
Purchase price of common stock, percentage of fair value						85.00%
Offering period						6 months
Purchase period						1 year
Maximum number of shares available for repurchase for each employee (in shares)						1,500
Maximum value of shares available for repurchase for each employee | $						$ 25,000
Number of shares repurchased (in shares)							447,042	302,795
ESPP | 2019 Employee Stock Purchase Plan | Class A and Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential increase in number of share authorized, as a percentage of total common stock outstanding						1.00%