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Number Of Shares Offered By Existing Shareholders To Buy Shares From Employees And Former Employees .

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Stock-based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended	10 Months Ended	12 Months Ended
	Feb. 28, 2021 USD ($) $ / shares	Feb. 28, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) tranche $ / shares shares	Dec. 31, 2021 USD ($) tranche $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2017	Dec. 31, 2014	Mar. 31, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares) \| shares				148,863,000	148,863,000	454,958,000	444,922,000
Share based payment arrangement, unvested award options, cost not yet recognized, amount \| $				$ 161,400	$ 161,400
Share based compensation by share based payment arrangement options granted (in shares) \| shares					0	23,269,000	31,381,000
Grant date fair value (in dollars per share) \| $ / shares					$ 9.35	$ 1.70
Share-based compensation arrangement options, exercises in period, intrinsic value \| $					$ 2,548,300	$ 189,500	$ 26,800
Share-based compensation, options vested in period, fair value \| $					79,900	29,800	17,100
Stock-based compensation \| $					341,942	79,158	$ 17,634
Tender Offer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation \| $						$ 35,200
Tender Offer \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares offered by existing shareholders to buy shares from employees and former employees (in shares) \| shares										31,100,000
Tender Offer \| Series G Redeemable Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares offered by existing shareholders to buy shares from employees and former employees (in shares) \| shares										24,000,000
2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options to be granted price as a percentage of fair value						110.00%
Percentage of voting stock eligible for options						10.00%
2020 Equity Incentive Plan \| Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares) \| shares						60,000,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation \| $					$ 9,900
Employee Stock Purchase Plan \| Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options to be granted price as a percentage of fair value					85.00%
Common stock shares reserved for future issuance (in shares) \| shares						6,000,000
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares) \| shares				63,267,000	63,267,000	98,502,000	99,682,000
Share based payment arrangement, unvested award, period for recognition					2 years 6 months
Options \| 2014 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation by share based payment arrangement number of shares available for issuance (in shares) \| shares				0	0
Options \| 2017 Amended and Restated Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of voting stock eligible for options								10.00%
Share based compensation by share based payment arrangement number of shares available for issuance (in shares) \| shares				0	0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares) \| shares				14,684,000	14,684,000	3,061,000	30,000
Unrecognized compensation, equity instruments other than options \| $				$ 913,700	$ 913,700
Service period				4 years	3 years 4 months 24 days
Stock-based compensation \| $			$ 21,300
Grant date fair value (in dollars per share) \| $ / shares				$ 68.03	$ 68.03	$ 31.55	$ 3.35
Restricted Stock Units \| Founder and CEO Long Term Performance Award \| Founder CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation, equity instruments other than options \| $	$ 232,200	$ 232,200		$ 190,100	$ 190,100
Stock-based compensation \| $					$ 42,000
Number of RSUs Eligible to Vest (in shares) \| shares		11,500,000
Share-based compensation arrangement by share-based payment award, beginning of award performance period, period after effective date		2 years
Share-based compensation arrangement by share-based payment award, number of tranches \| tranche				7	7
Number of consecutive trading days for the stock hurdle price to be achieved					90 days
Share price (in dollars per share) \| $ / shares	$ 165.00	$ 165.00
Grant date fair value (in dollars per share) \| $ / shares	$ 20.19	$ 20.19
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation, equity instruments other than options \| $				$ 13,400	$ 13,400
Service period					2 years 3 months 18 days
Grant date fair value (in dollars per share) \| $ / shares				$ 57.37	$ 57.37	37.75	0
Minimum \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share) \| $ / shares						$ 4.61	3.35
Minimum \| Options \| 2014 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options to be granted price as a percentage of fair value									85.00%
Minimum \| Restricted Stock Units \| Founder and CEO Long Term Performance Award \| Founder CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment arrangement, unvested award, period for recognition	3 years 5 months 12 days
Maximum \| 2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation by share based payment arrangement contractual term of stock options						10 years
Maximum \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share) \| $ / shares						$ 21.06	$ 4.01
Maximum \| Options \| 2014 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation by share based payment arrangement contractual term of stock options									10 years
Maximum \| Options \| 2017 Amended and Restated Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation by share based payment arrangement contractual term of stock options								10 years
Maximum \| Restricted Stock Units \| Founder and CEO Long Term Performance Award \| Founder CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment arrangement, unvested award, period for recognition	5 years 4 months 17 days
Holders of Ten Percent or More of The Voting Equity Capital \| 2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation by share based payment arrangement contractual term of stock options						5 years
Holders of Ten Percent or More of The Voting Equity Capital \| Options \| 2014 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of voting stock eligible for options									10.00%
Share based compensation by share based payment arrangement contractual term of stock options									5 years
Holders of Ten Percent or More of The Voting Equity Capital \| Options \| 2017 Amended and Restated Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation by share based payment arrangement contractual term of stock options								5 years
Holders of Ten Percent or More of The Voting Equity Capital \| Minimum \| 2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options to be granted price as a percentage of fair value						100.00%
Holders of Ten Percent or More of The Voting Equity Capital \| Minimum \| Options \| 2014 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options to be granted price as a percentage of fair value									110.00%
Holders of Ten Percent or More of The Voting Equity Capital \| Minimum \| Options \| 2017 Amended and Restated Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options to be granted price as a percentage of fair value								110.00%