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FINANCIAL INSTRUMENTS - Carrying Values and Estimated Fair Values - Non-securitized Notes Receivable (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net $ 2,485 $ 2,440
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 2,551 2,508
Securitized | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 1,963 1,917
Securitized | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 2,028 1,981
Non-securitized | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 522 523
Non-securitized | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 523 527
Non-securitized | Eligible for securitization | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 47 94
Non-securitized | Eligible for securitization | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 48 98
Non-securitized | Not eligible for securitization | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net 475 429
Non-securitized | Not eligible for securitization | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Vacation ownership notes receivable, net $ 475 $ 429