CONTINGENCIES AND COMMITMENTS (Details) $ in Millions	Sep. 30, 2025 USD ($) vacation_ownership_unit transaction
Commitments and Contingencies Disclosure [Line Items]
Surety bonds issued	$ 122
Guarantor obligations, maximum exposure, remainder of year	$ 6
Exchange & Third-Party Management
Commitments and Contingencies Disclosure [Line Items]
Guarantor obligations, ownership percentage	95.00%
Revolving corporate credit facility, net
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	$ 14
Revolving corporate credit facility, net \| Securitization Transaction
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	13
Letter of credit
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	9
Bali, Indonesia
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment	$ 28
Number of transactions \| transaction	2
Bali, Indonesia \| 32 Unit Transaction
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment obligation due, 2026	$ 10
Purchase commitment obligation due, 2027	$ 1
Number of vacation ownership units, acquisition pending \| vacation_ownership_unit	32
Bali, Indonesia \| 26 Unit Transaction
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment obligation due, remainder of 2025	$ 2
Purchase commitment obligation due, 2026	14
Purchase commitment obligation due, 2027	$ 1
Number of vacation ownership units, acquisition pending \| vacation_ownership_unit	26
Thailand \| 60 Unit Transaction
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment	$ 37
Purchase commitment obligation due, 2026	35
Purchase commitment obligation due, 2027	$ 2
Number of vacation ownership units, acquisition pending \| vacation_ownership_unit	60
Nashville, Tennessee
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment obligation due, 2027	$ 122
Number of vacation ownership units, acquisition pending \| vacation_ownership_unit	168
Information technology hardware and software
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment	$ 145
Purchase commitment obligation due, remainder of 2025	48
Purchase commitment obligation due, 2026	49
Purchase commitment obligation due, 2027	25
Purchase commitment obligation due, 2028	10
Purchase commitment obligation due, 2029	5
Purchase commitment obligation due, thereafter	$ 8

MARRIOTT VACATIONS WORLDWIDE Corp 10-Q