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VARIABLE INTEREST ENTITIES - Interest Income and Expense Recognized as a Result of Our Involvement with Variable Interest Entities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]      
Interest income $ 331 $ 312 $ 284
Interest expense, net (162) (145) (118)
Administrative expenses 243 $ 273 $ 249
Variable Interest Entity      
Variable Interest Entity [Line Items]      
Interest income 288    
Interest expense, net 104    
Amortization of debt issuance costs 11    
Administrative expenses 1    
Vacation Ownership Notes Receivable Securitizations | Variable Interest Entity      
Variable Interest Entity [Line Items]      
Interest income 272    
Interest expense, net 95    
Amortization of debt issuance costs 10    
Administrative expenses 1    
Warehouse Credit Facility | Variable Interest Entity      
Variable Interest Entity [Line Items]      
Interest income 16    
Interest expense, net 9    
Amortization of debt issuance costs 1    
Administrative expenses $ 0