v3.26.1
REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Deferred Revenue, Deferred Cost of VOI Sales and Deferred Direct Selling Costs from Sales of VOIs Related to Projects under Construction (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disaggregation of Revenue [Line Items]    
Sales of VOIs, net $ 864 $ 637
Deferred Sales of VOIs    
Disaggregation of Revenue [Line Items]    
Sales of VOIs, net 539 460
Cost of VOI sales 152 133
Sales and marketing expense $ 88 $ 74