ACCOUNTS RECEIVABLE - Schedule of Changes in Allowance (Details) $ in Millions	9 Months Ended
	Sep. 30, 2026 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of December 31, 2025	$ 93
Current period provision for expected credit losses	46
Write-offs charged against the allowance	(69)
Balance as of September 30, 2026	70
Fee-for-service commissions
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of December 31, 2025	30
Current period provision for expected credit losses	6
Write-offs charged against the allowance	(25)
Balance as of September 30, 2026	11
Real estate and financing
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of December 31, 2025	62
Current period provision for expected credit losses	23
Write-offs charged against the allowance	(43)
Balance as of September 30, 2026	42
Resort and club operations
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of December 31, 2025	1
Current period provision for expected credit losses	17
Write-offs charged against the allowance	(1)
Balance as of September 30, 2026	$ 17