INVENTORY - Composition of Inventory (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Finished goods	$ 751	$ 782
Work-in-progress	0	69
Real estate inventory	751	851
Other	10	8
Inventory	$ 761	$ 859

No definition available.

Name:	us-gaap_InventoryDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of real estate which is available for sale in the form of shared property ownership in which rights vest in several owners (buyers, timeshare holders) to use the property for a specified period each year (timeshare). Included in this item would be real estate assets in which timeshares are for sale, such as in condominiums at timeshare resorts. Excluded from this item would be assets, other than real estate, in which the Entity has sold or intends to sell timeshares, such as for cruises, recreational vehicles, campgrounds, aircraft (fractional ownership) and other types of rights.

+ References

No definition available.

+ Details

Name:	us-gaap_InventoryRealEstateTimeshareAvailableForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a)(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_InventoryWorkInProcess
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Total of (1) improvements, (2) held-for-sale, (3) construction-in-process, and (4) operating supplies, held in the normal course of business.

+ References

No definition available.

+ Details

Name:	vac_InventoryTimeshare
Namespace Prefix:	vac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Total of (1) improvements, (2) held-for-sale, and (3) construction-in-process.

+ References

No definition available.

+ Details

Name:	vac_InventoryTimeshareGross
Namespace Prefix:	vac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Operating Supplies and Inventories

+ References

No definition available.

+ Details

Name:	vac_OperatingSuppliesAndInventories
Namespace Prefix:	vac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant