REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Remaining Transaction Price Related to Advanced Deposits, Club Activation Fees and Bonus Points Incentive Liability (Details) $ in Millions	6 Months Ended
Jun. 30, 2026 USD ($)
Advanced deposits
Disaggregation of Revenue [Line Items]
Remaining Transaction Price	$ 228
Recognition Period	18 months
Club activation fees
Disaggregation of Revenue [Line Items]
Remaining Transaction Price	$ 82
Recognition Period	7 years
Bonus point incentive liability
Disaggregation of Revenue [Line Items]
Remaining Transaction Price	$ 113
Bonus point incentive liability \| Minimum
Disaggregation of Revenue [Line Items]
Recognition Period	18 months
Bonus point incentive liability \| Maximum
Disaggregation of Revenue [Line Items]
Recognition Period	30 months
Annual club dues
Disaggregation of Revenue [Line Items]
Remaining Transaction Price	$ 70
Recognition Period	1 year
Other
Disaggregation of Revenue [Line Items]
Remaining Transaction Price	$ 111
Recognition Period	1 year

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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