COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - Narrative (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 30, 2023 USD ($) $ / shares shares	Feb. 28, 2023 shares	Sep. 30, 2023 USD ($) vote class $ / shares shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) vote class $ / shares shares	Sep. 30, 2022 USD ($)	Dec. 31, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares outstanding (in shares) | shares			0		0		0
Number of classes of common stock | class			3		3
Stock repurchased and retired, amount			$ 611		$ 611
Share-based compensation			83	$ 110	790	$ 494
Capitalized share-based compensation expense			5	4	12	21
Unrecognized compensation cost			500		$ 500
Unrecognized compensation cost related to outstanding stock options, weighted-average period					1 year 1 month 6 days
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation			26	83	$ 614	316
Market-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Canceled (in shares) | shares		35,500,000
Share-based compensation			$ 10	$ 79	563	$ 245
Market-Based RSUs | General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation					$ 485
2013, 2020 and 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized (in shares) | shares			405,000,000		405,000,000
Shares issued under plans (in shares) | shares					122,000,000
Common stock reserved for issuance (in shares) | shares					82,000,000
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining available for issuance (in shares) | shares			201,000,000		201,000,000
Tranche 1 Convertible Note Holders
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount of all warrants			$ 380		$ 380
Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of voting rights per share | vote			1		1
Common Class A | Share Purchase Agreement | United States Marshal Service
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares acquired (in shares) | shares	55,273,469
Average cost of common stock repurchased (in dollars per share) | $ / shares	$ 10.96
Stock repurchased and retired, amount	$ 608
Stock repurchase program transaction costs	$ 2
Inflation reduction act, excise tax			$ 3		$ 3
Common Class A | IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate warrants exercisable (in shares) | shares			14,300,000		14,300,000
Exercise price (in dollars per share) | $ / shares			$ 26.60		$ 26.60
Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of voting rights per share | vote			10		10