COMMON STOCK AND STOCKHOLDERS' EQUITY - Schedule of Share-Based Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	$ 78,000,000	$ 79,000,000	$ 229,000,000	$ 227,000,000
Time-Based RSUs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	75,000,000	76,000,000	220,000,000	225,000,000
Market-Based RSUs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation		0		(8,000,000)
Share-based payment arrangement, expense reversal		11,000,000		11,000,000
Brokerage and transaction
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	2,000,000	2,000,000	7,000,000	7,000,000
Technology and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	40,000,000	48,000,000	123,000,000	144,000,000
Operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	1,000,000	1,000,000	4,000,000	5,000,000
Marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	2,000,000	3,000,000	6,000,000	6,000,000
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	$ 33,000,000	$ 25,000,000	$ 89,000,000	$ 65,000,000