VARIABLE INTEREST ENTITIES - Schedule of Interest Income and Expense Recognized as a Result of Our Involvement with Variable Interest Entities (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Variable Interest Entity [Line Items] | ||||
| Interest income | $ 92 | $ 88 | $ 271 | $ 260 |
| Administrative expenses | 71 | $ 53 | 197 | $ 175 |
| Variable Interest Entity | ||||
| Variable Interest Entity [Line Items] | ||||
| Interest income | 81 | 238 | ||
| Interest expense | 29 | 86 | ||
| Debt issuance cost amortization | 3 | 9 | ||
| Administrative expenses | 1 | |||
| Variable Interest Entity | Vacation Ownership Notes Receivable Securitizations | ||||
| Variable Interest Entity [Line Items] | ||||
| Interest income | 70 | 213 | ||
| Interest expense | 26 | 78 | ||
| Debt issuance cost amortization | 2 | 8 | ||
| Administrative expenses | 1 | |||
| Variable Interest Entity | Warehouse Credit Facility | ||||
| Variable Interest Entity [Line Items] | ||||
| Interest income | 11 | 25 | ||
| Interest expense | 3 | 8 | ||
| Debt issuance cost amortization | $ 1 | 1 | ||
| Administrative expenses | $ 0 | |||