v3.26.3
Restructuring (Activity Related To The Restructuring Costs) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Restructuring Cost and Reserve [Roll Forward]          
Liability beginning balance     $ 28    
Restructuring $ 12 $ 0 10 $ 0  
Cash Payments     (21)    
Liability ending balance 19   19   $ 28
Inventory write-downs and impairments     27 6  
Other     2    
Resort Optimization Initiative          
Restructuring Cost and Reserve [Roll Forward]          
Cash Payments     (2)    
Resort Optimization Initiative | Vacation Ownership          
Restructuring Cost and Reserve [Roll Forward]          
Liability beginning balance     4    
Liability ending balance 2   2   4
Resort optimization initiative costs 4 7 35 7 233
Facility related          
Restructuring Cost and Reserve [Roll Forward]          
Liability beginning balance     12    
Restructuring     0    
Cash Payments     (1)    
Liability ending balance 11   11   12
Other     0    
Facility related | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold          
Restructuring Cost and Reserve [Roll Forward]          
Inventory write-downs and impairments 3 6 14 6  
Facility related | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:OperatingCostsAndExpenses          
Restructuring Cost and Reserve [Roll Forward]          
Resort closure costs 0   5    
Personnel-related          
Restructuring Cost and Reserve [Roll Forward]          
Liability beginning balance     14    
Restructuring     5    
Cash Payments     (13)    
Liability ending balance 8   8   14
Other [1]     2    
Personnel-related | Resort Optimization Initiative | Vacation Ownership          
Restructuring Cost and Reserve [Roll Forward]          
Restructuring     (2)   4
Other Restructuring Costs         9
Personnel-related | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:OperatingCostsAndExpenses          
Restructuring Cost and Reserve [Roll Forward]          
Resort optimization initiative costs         5
Personnel-related | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:RestructuringCharges          
Restructuring Cost and Reserve [Roll Forward]          
Severance Costs 0   (2)    
Other Restructuring          
Restructuring Cost and Reserve [Roll Forward]          
Liability beginning balance     2    
Restructuring     5    
Cash Payments     (7)    
Liability ending balance 0   0   2
Other     0    
Other Restructuring | Resort Optimization Initiative | Vacation Ownership          
Restructuring Cost and Reserve [Roll Forward]          
Inventory write-downs and impairments 2 6 27 6 $ 216
Other Restructuring | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold          
Restructuring Cost and Reserve [Roll Forward]          
Other (1)   13    
Other Restructuring | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:OperatingCostsAndExpenses          
Restructuring Cost and Reserve [Roll Forward]          
Other Restructuring Costs $ 2 $ 1 $ 5 $ 1  
[1] Represents reimbursable costs the Company will pay on behalf of the respective HOAs related to the resort optimization initiative.