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TIMESHARE FINANCING RECEIVABLES - Schedule of Gross Timeshare Financing Receivables by Origination Year and Average FICO Score (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Originated      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year $ 862    
One year prior to current fiscal year 1,180    
Two years prior to current fiscal year 505    
Three years prior to current fiscal year 349    
Four years prior to current fiscal year 138    
More than five years prior to current fiscal year 177    
Timeshare financing receivables, gross 3,211   $ 2,932
2025 0    
2024 25    
2023 13    
2022 30    
2021 13    
Prior 3    
Total 84 $ 57  
Originated | 700+      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 593    
One year prior to current fiscal year 742    
Two years prior to current fiscal year 295    
Three years prior to current fiscal year 206    
Four years prior to current fiscal year 82    
More than five years prior to current fiscal year 99    
Timeshare financing receivables, gross 2,017   1,840
Originated | 600-699      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 183    
One year prior to current fiscal year 284    
Two years prior to current fiscal year 143    
Three years prior to current fiscal year 104    
Four years prior to current fiscal year 38    
More than five years prior to current fiscal year 40    
Timeshare financing receivables, gross 792   723
Originated | Less than 600      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 16    
One year prior to current fiscal year 28    
Two years prior to current fiscal year 19    
Three years prior to current fiscal year 15    
Four years prior to current fiscal year 6    
More than five years prior to current fiscal year 6    
Timeshare financing receivables, gross 90   85
Originated | No score      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 70    
One year prior to current fiscal year 126    
Two years prior to current fiscal year 48    
Three years prior to current fiscal year 24    
Four years prior to current fiscal year 12    
More than five years prior to current fiscal year 32    
Timeshare financing receivables, gross 312   284
Acquired      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 0    
One year prior to current fiscal year 14    
Two years prior to current fiscal year 251    
Three years prior to current fiscal year 132    
Four years prior to current fiscal year 112    
More than five years prior to current fiscal year 306    
Timeshare financing receivables, gross 815   1,084
2025 0    
2024 0    
2023 30    
2022 13    
2021 14    
Prior 75    
Total 132 $ 111  
Acquired | 700+      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 0    
One year prior to current fiscal year 10    
Two years prior to current fiscal year 160    
Three years prior to current fiscal year 73    
Four years prior to current fiscal year 57    
More than five years prior to current fiscal year 138    
Timeshare financing receivables, gross 438   588
Acquired | 600-699      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 0    
One year prior to current fiscal year 4    
Two years prior to current fiscal year 66    
Three years prior to current fiscal year 42    
Four years prior to current fiscal year 40    
More than five years prior to current fiscal year 98    
Timeshare financing receivables, gross 250   330
Acquired | Less than 600      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 0    
One year prior to current fiscal year 0    
Two years prior to current fiscal year 2    
Three years prior to current fiscal year 0    
Four years prior to current fiscal year 4    
More than five years prior to current fiscal year 18    
Timeshare financing receivables, gross 24   33
Acquired | No score      
Financing Receivable, Recorded Investment [Line Items]      
Current fiscal year 0    
One year prior to current fiscal year 0    
Two years prior to current fiscal year 23    
Three years prior to current fiscal year 17    
Four years prior to current fiscal year 11    
More than five years prior to current fiscal year 52    
Timeshare financing receivables, gross $ 103   $ 133