DESCRIPTION OF BUSINESS (Details) $ / shares in Units, ر.س in Millions			1 Months Ended					3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2023 USD ($) shares	Apr. 29, 2022 USD ($) facility	Aug. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) facility	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) facility	Dec. 31, 2023 USD ($)	Nov. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Apr. 29, 2022 SAR (ر.س) facility	Feb. 27, 2022 USD ($)	Feb. 27, 2022 SAR (ر.س)
Debt Instrument [Line Items]
Net loss								$ 992,475,000	$ 630,894,000	$ 2,316,724,000	$ 2,174,654,000
Accumulated deficit								$ (12,515,476,000)		$ (12,515,476,000)			$ (10,198,752,000)
Equity Distribution Agreement
Debt Instrument [Line Items]
Consideration to be received on agreement														$ 600,000,000
Net proceeds received							$ 594,300,000
Remaining number of shares available (in shares) | shares										0
2022 Subscription Agreement | Ayar
Debt Instrument [Line Items]
Consideration to be received on agreement														$ 915,000,000
Net proceeds received							915,000,000
Underwriting Agreement
Debt Instrument [Line Items]
Consideration to be received on agreement	$ 1,200,000,000
Net proceeds received					$ 1,200,000,000
2023 Subscription Agreement | Ayar
Debt Instrument [Line Items]
Consideration to be received on agreement	$ 1,800,000,000
Net proceeds received					$ 1,800,000,000
Number of shares issued (in shares) | shares	265,693,703
Series A Redeemable Convertible Preferred Stock | Ayar | Redeemable Convertible Preferred Stock
Debt Instrument [Line Items]
Consideration to be received on agreement				$ 1,000,000,000.0
Number of shares issued (in shares) | shares				100,000
Convertible preferred stock, par value (in dollars per share) | $ / shares				$ 0.0001
Gross proceeds received				$ 1,000,000,000.0
Series B Redeemable Convertible Preferred Stock | Ayar | Redeemable Convertible Preferred Stock
Debt Instrument [Line Items]
Consideration to be received on agreement			$ 750,000,000
Number of shares issued (in shares) | shares			75,000
Convertible preferred stock, par value (in dollars per share) | $ / shares			$ 0.0001
Gross proceeds received			$ 750,000,000
Number of shares to be issued (in shares) | shares			75,000
SIDF
Debt Instrument [Line Items]
Principal Amount							1,400,000,000					$ 1,400,000,000					$ 1,400,000,000	ر.س 5,190
ABL Credit Facility | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Debt instrument, term												5 years
Maximum borrowing capacity							1,000,000,000					$ 1,000,000,000			$ 1,000,000,000.0
ABL Credit Facility | Bridge Loan | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 100,000,000.0
GIB Facility Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 266,100,000				$ 266,600,000	$ 266,100,000					$ 266,100,000				ر.س 1,000
Number of facilities | facility		2					2					2				2
Interest rate						1.40%
GIB Facility Agreement | Bridge Loan | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 173,000,000					$ 173,000,000					$ 173,000,000				ر.س 650
Interest rate		1.25%
GIB Facility Agreement | Working Capital Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 93,100,000					$ 93,100,000					$ 93,100,000				ر.س 350
Interest rate		1.70%
DDTL Credit Facility | Secured Debt | Delayed Draw Term Loan (DDTL)
Debt Instrument [Line Items]
Debt instrument, term			5 years
Maximum borrowing capacity			$ 750,000,000