Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	12 Months Ended			13 Months Ended
	Sep. 25, 2020 shares	Sep. 11, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2020 USD ($) Employee $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Oct. 31, 2020 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value of stock options granted | $ / shares					$ 4.23	$ 1.27	$ 1.17
Aggregate intrinsic value of options exercised | $					$ 112,700	$ 11,100	$ 11,200
Fair value of stock options vested | $					$ 10,200	$ 2,500	$ 1,600
Share based compensation, volatility rate						50.00%	60.00%
Cash bonuses paid to vested option holders | $							$ 38,800
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares for tax withholding obligations					1,800,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options exercised, Shares					3,769,000
Award vesting percentage					25.00%
Term of stock option					10 years
Stock-based compensation expense | $					$ 13,000	$ 2,500	$ 1,800
Unrecognized stock-based compensation cost | $				$ 36,800	$ 36,800
Weighted-average period over which cost is expected to be recognized					3 years
Grant to purchase shares of common stock			400,000
Fair value of stock option | $			$ 2,400
Weighted average remaining contractual term, Exercisable					7 years 1 month 6 days
Stock Options | First Anniversary of the Vesting Commencement Date, and Thereafter Ratably Monthly Over the Remaining Period
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					3 years
Performance and Marked Based Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $					$ 600
Stock options granted to purchase of common stock			600,000
Exercise price of common stock | $ / shares			$ 6.84
Estimated grant date fair value | $			$ 1,400
Performance and Marked Based Stock Options | Satisfied Monthly Over 4-year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Stock options granted to purchase of common stock			400,000
Performance and Marked Based Stock Options | Satisfied on January 1, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted to purchase of common stock			200,000
Stock options vesting date			Jan. 01, 2022
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of RSAs and RSUs vested | $					$ 335,400
Weighted-average fair value of restricted shares granted | $ / shares					$ 23.56
Restricted Stock Units ("RSUs")
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares granted						0	0
Restricted shares outstanding						0	0
Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $					$ 1,800	$ 1,300
Unrecognized stock-based compensation cost | $				$ 4,200	$ 4,200
Weighted-average period over which cost is expected to be recognized					2 years 3 months 18 days
Restricted shares granted					0		0
Restricted shares outstanding				1,409,000	1,409,000	1,879,000
Weighted-average fair value of restricted shares granted | $ / shares						$ 3.88
Shares vested					470,000
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, deferred period					6 years 3 months 18 days	6 years 3 months 18 days	6 years 1 month 6 days
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, deferred period					5 years 3 months 18 days	5 years 7 months 6 days	5 years 8 months 12 days
Common Class A | Restricted Stock Units ("RSUs")
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					4 years
Stock-based compensation expense | $					$ 9,500
Weighted-average period over which cost is expected to be recognized					3 years 8 months 12 days
Unrecognized stock-based compensation cost | $				$ 109,000	$ 109,000
Common Class B | Restricted Stock Units ("RSUs")
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $					373,000
Grant date fair value | $		$ 533,300
Unrecognized compensation cost | $				160,300	160,300
Excess tax benefit associated with equity awards | $					21,700	$ 900	$ 1,300
Common Class B | Restricted Stock Units ("RSUs") | Co-Chief Executive Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares granted		24,633,066
Common Class B | Restricted Stock Units ("RSUs") Performance-Vesting Founders Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $				$ 232,100	$ 319,800
Shares vested				16,422,044
Shares for tax withholding obligations				700,000
Remaining shares not issued until three years from vesting date								15,700,000
Share based compensation, volatility rate		55.00%
Share based compensation, cost of equity		11.00%
Share based compensation, DLOM of issuance of shares		20.00%
Share based compensation, deferred period		3 years
Common Class B | Restricted Stock Units ("RSUs") Performance-Vesting Founders Awards | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares for tax withholding obligations					700,000
Common Class B | Restricted Stock Units ("RSUs") Performance-Vesting Founders Awards | Co-Chief Executive Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vested		8,211,022
Common Class B | Restricted Stock Units ("RSUs") Time-Vesting Founders Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $					$ 53,200
Weighted average remaining contractual term, Exercisable					2 years 1 month 6 days
Common Class B | Restricted Stock Units ("RSUs") Time-Vesting Founders Awards | Co-Chief Executive Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Shares vested		4,105,511
Common Class B | Maximum | Restricted Stock Units ("RSUs") Performance-Vesting Founders Awards | Co-Chief Executive Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock price | $ / shares		$ 51.28
Common Class B | Minimum | Restricted Stock Units ("RSUs") Performance-Vesting Founders Awards | Co-Chief Executive Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock price | $ / shares		$ 6.07
2020 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares available for issuance				34,400,000	34,400,000
2020 Equity Incentive Plan | Common Class A And Common Class B
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares available for issuance				60,700,000	60,700,000
Description of shares available for issue					The number of shares available for issuance under the 2020 Plan will be increased by an annual increase on the first day of each calendar year beginning January 1, 2021 and ending on and including January 1, 2030, equal to the lesser of (A) 5% of the aggregate number of shares of Class A and Class B common stock outstanding on the final day of the immediately preceding calendar year and (B) such smaller number of shares as is determined by the Company’s board of directors.
Percentage of shares issued on common stock outstanding					5.00%
2020 Equity Incentive Plan | Common Class A And Common Class B | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options exercised, Shares					300,000,000
2020 Employee Stock Purchase Plan | Common Class A
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares available for issuance	9,000,000			9,000,000	9,000,000
Description of shares available for issue					In addition, the number of shares available for issuance under the ESPP will be annually increased on January 1 of each calendar year beginning in 2021 and ending in 2030, by an amount equal to the lesser of: (i) 1% of the aggregate number of shares of Class A and Class B common stock outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares as is determined by the Company’s board of directors.
Percentage of shares issued on common stock outstanding	1.00%
Purchase price of shares as a percentage of fair market value					85.00%
Employee stock purchase offerings					0
Number of eligible employees enrolled | Employee					0
2020 Employee Stock Purchase Plan | Common Class A | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares available for issuance	100,000,000