v3.26.1
Restructuring (Activity Related To The Restructuring Costs) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Restructuring Cost and Reserve [Roll Forward]      
Liability beginning balance $ 28    
Restructuring (2) $ 0  
Cash Payments (10)    
Liability ending balance 18   $ 28
Inventory write-downs and impairments 19 $ 0  
Other 2    
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold      
Restructuring Cost and Reserve [Roll Forward]      
Inventory write-downs and impairments 1    
Resort Optimization Initiative      
Restructuring Cost and Reserve [Roll Forward]      
Cash Payments (1)    
Resort Optimization Initiative | Vacation Ownership      
Restructuring Cost and Reserve [Roll Forward]      
Liability beginning balance 4    
Liability ending balance 3   4
Resort optimization initiative costs 22   233
Facility related      
Restructuring Cost and Reserve [Roll Forward]      
Liability beginning balance 12    
Restructuring 0    
Cash Payments 0    
Liability ending balance 12   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 8    
Facility related | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:OperatingExpenses      
Restructuring Cost and Reserve [Roll Forward]      
Resort closure costs 3    
Personnel-related      
Restructuring Cost and Reserve [Roll Forward]      
Liability beginning balance 14    
Restructuring (2)    
Cash Payments (8)    
Liability ending balance 6   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:OperatingExpenses      
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 (2)    
Other Restructuring      
Restructuring Cost and Reserve [Roll Forward]      
Liability beginning balance 2    
Restructuring 0    
Cash Payments (2)    
Liability ending balance 0   2
Other 0    
Other Restructuring | Resort Optimization Initiative | Vacation Ownership      
Restructuring Cost and Reserve [Roll Forward]      
Inventory write-downs and impairments 19   $ 216
Other Restructuring | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold      
Restructuring Cost and Reserve [Roll Forward]      
Resort portfolio realignment 11    
Other Restructuring | Resort Optimization Initiative | Vacation Ownership | Income Statement Location [Axis]: us-gaap:OperatingExpenses      
Restructuring Cost and Reserve [Roll Forward]      
Other Restructuring Costs $ 2    
[1] Represents reimbursable costs the Company will pay on behalf of the respective HOAs related to the resort optimization initiative.