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TIMESHARE FINANCING RECEIVABLES - Schedule of Timeshare Financing Receivables (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Apr. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross $ 4,978   $ 4,314    
Timeshare financing receivables, net 3,591   3,115    
Originated          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross 3,970   3,665    
Unamortized non-credit acquisition net premium 0   0    
Less: allowance for financing receivables losses (1,195)   (1,078) $ (904) $ (804)
Timeshare financing receivables, net 2,775   2,587    
Acquired          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross 1,008   649    
Unamortized non-credit acquisition net premium 27   34    
Less: allowance for financing receivables losses (219)   (155) $ (189) $ (268)
Timeshare financing receivables, net 816   528    
Securitized          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross 300 $ 500      
Securitized | Originated          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross 2,116   1,734    
Securitized | Acquired          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross 583   373    
Unsecuritized | Originated          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross 1,854   1,931    
Unsecuritized | Acquired          
Accounts Notes And Loans Receivable [Line Items]          
Timeshare financing receivables, gross $ 425   $ 276