CONVERTIBLE PREFERRED STOCK - Narrative (Details)							1 Months Ended												2 Months Ended	3 Months Ended			6 Months Ended			12 Months Ended				16 Months Ended
		Jul. 23, 2021 shares	Dec. 31, 2020 USD ($) shares		Dec. 24, 2020 USD ($) shares	Dec. 22, 2020 USD ($) shares	Apr. 30, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) shares		Feb. 28, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares		Sep. 30, 2020 USD ($) condition $ / shares shares	Aug. 31, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) shares	Mar. 31, 2020 USD ($) shares	Oct. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Apr. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) shares	Jun. 30, 2021 USD ($) shares		Jun. 30, 2022 USD ($) shares	Jun. 30, 2021 USD ($) shares		Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares		Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Jul. 22, 2021 shares	Dec. 31, 2018 USD ($)
Class of Stock [Line Items]
Convertible preferred stock, shares issued (in shares) | shares																				0			0			0					437,182,072
Convertible preferred stock, shares outstanding (in shares) | shares			957,159,704	[1]				1,088,999,959	[2]		957,159,704	[1]								0	1,155,909,367	[1],[2]	0	1,155,909,367	[1],[2]	0	957,159,704	[1]			437,182,072
Convertible preferred stock, value			$ 2,494,076,000					$ 4,454,811,000			$ 2,494,076,000										$ 5,836,785,000			$ 5,836,785,000			$ 2,494,076,000
Issuance of convertible preferred shares (in shares) | shares	[2]																				66,909,408
Number of milestone conditions required to receive funding | condition													2
Increase in fair value of forward contracts																							$ 0	(454,546,000)
Stock-based compensation expense																				$ 94,392,000	$ 24,449,000		$ 268,943,000	$ 129,244,000
Common stock, shares authorized (in shares) | shares										1,316,758,889										15,000,000,000			15,000,000,000			15,000,000,000
Convertible preferred stock, shares authorized (in shares) | shares										1,155,909,398
Eligible Holders
Class of Stock [Line Items]
Aggregate value of convertible preferred shares approved for issuance										$ 71,000,000
Series E Contingent Forward Contract Liability
Class of Stock [Line Items]
Contingent forward contract, fair value			110,500,000		$ 110,500,000		$ 722,400,000			1,444,900,000	110,500,000		$ 800,000						$ 722,400,000							$ 0	110,500,000
Increase in fair value of forward contracts											109,700,000																(109,700,000)
Series C
Class of Stock [Line Items]
Repurchase of convertible preferred shares (in shares) | shares																														11,331,430
Repurchase of convertible preferred shares																														$ 60,000,000
Price of stock repurchased (in dollars per share) | $ / shares																														$ 5.30
Series C | Third Company Repurchase
Class of Stock [Line Items]
Price of stock repurchased (in dollars per share) | $ / shares														$ 1.02
Number of shares authorized to be repurchased (in shares) | shares														9,656,589
Payments for repurchase of convertible preferred stock														$ 9,900,000
Convertible preferred stock, value														$ 20,400,000
Cumulative adjustments to additional paid in capital for share repurchases			$ 10,500,000								$ 10,500,000																$ 10,500,000
Series C | Fourth Company Repurchase
Class of Stock [Line Items]
Price of stock repurchased (in dollars per share) | $ / shares											$ 1.21
Number of shares authorized to be repurchased (in shares) | shares			1,850,800								1,850,800																1,850,800
Payments for repurchase of convertible preferred stock											$ 2,200,000
Convertible preferred stock, value													$ 4,500,000
Cumulative adjustments to additional paid in capital for share repurchases			$ 2,200,000								2,200,000																$ 2,200,000
Convertible preferred stock, fair value (in dollars per share) | $ / shares													$ 2.42
Series B
Class of Stock [Line Items]
Repurchase of convertible preferred shares (in shares) | shares	[1]																							3,525,365
Payments for repurchase of convertible preferred stock																							$ 0	$ 3,000,000
Series B | Fifth Company Repurchase
Class of Stock [Line Items]
Number of shares authorized to be repurchased (in shares) | shares						3,525,332
Payments for repurchase of convertible preferred stock						$ 3,000,000
Convertible preferred stock, value						4,000,000
Cumulative adjustments to additional paid in capital for share repurchases						$ 1,000,000
Convertible preferred shares subject to repurchase, mandatory redemption term			45 days
Series D
Class of Stock [Line Items]
Convertible preferred stock issuable, value																$ 400,000,000
Proceeds from issuance of convertible preferred stock															$ 200,000,000	$ 200,000,000	$ 400,000,000	$ 200,000,000					0	3,000,000
Conversion of convertible notes																		$ 271,985,000											$ 272,000,000
Issuance of convertible preferred shares (in shares) | shares															82,496,121	82,496,092													374,777,280
Preferred stock, price (in dollars per share) | $ / shares																													$ 2.33	$ 2.33
Proceeds from issuance of convertible preferred stock and conversion of convertible debt																													$ 872,000,000
Series D Preferred Stock, Tranche One
Class of Stock [Line Items]
Convertible preferred stock issuable, value																																$ 200,000,000
Series D Preferred Stock, Tranche Three
Class of Stock [Line Items]
Convertible preferred stock issuable, value																																400,000,000
Series D Preferred Stock, Tranche Two
Class of Stock [Line Items]
Convertible preferred stock issuable, value																																$ 400,000,000
Series E
Class of Stock [Line Items]
Proceeds from issuance of convertible preferred stock					$ 400,000,000		$ 92,900,000	$ 107,100,000		$ 400,000,000	$ 400,000,000		$ 500,000,000						$ 200,000,000				$ 0	$ 600,000,000
Issuance of convertible preferred shares (in shares) | shares					133,818,821		66,909,408			133,818,821			167,273,525											200,728,229	[1]
Preferred stock, price (in dollars per share) | $ / shares							$ 2.99			$ 2.99			$ 2.99						$ 2.99
Convertible preferred stock, additional shares approved for issuance (in shares) | shares										200,700,000
Stock-based compensation expense																					$ 20,700,000			$ 123,600,000		$ 123,600,000
Series E | Eligible Holders
Class of Stock [Line Items]
Preferred stock, price (in dollars per share) | $ / shares										$ 2.99
Convertible preferred shares approved for issuance (in shares) | shares										23,737,221
Series E | Additional Purchasers
Class of Stock [Line Items]
Preferred stock, price (in dollars per share) | $ / shares										$ 2.99
Series E | Management
Class of Stock [Line Items]
Issuance of convertible preferred shares (in shares) | shares																			3,034,194
Series E | Director
Class of Stock [Line Items]
Issuance of convertible preferred shares (in shares) | shares																			1,658,705
Series E | Chief Executive Officer
Class of Stock [Line Items]
Issuance of convertible preferred shares (in shares) | shares							535,275
Common Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock into common stock in connection with the reverse recapitalization (in shares) | shares		1,155,909,367
Legacy Preferred Shareholders
Class of Stock [Line Items]
Stock converted, after exchange ratio (in shares) | shares		1,155,909,367

[1] The number of shares of convertible preferred stock and common stock issued and outstanding prior to the Merger have been retroactively adjusted by the Exchange Ratio to give effect to the reverse recapitalization treatment of the Merger. See Note 1 - Description of Business and Note 3 - Reverse Capitalization for more information.

[2] The number of shares of convertible preferred stock and common stock issued and outstanding prior to the Merger have been retroactively adjusted by the Exchange Ratio to give effect to the reverse recapitalization treatment of the Merger. See Note 1 “Description of Business” and Note 3 “Reverse Capitalization” for more information.