DEBT - Scheduled Future Principal Payments for Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Long Term Debt Maturities Repayments Of Principal [Line Items]
2020, remaining	$ 2
2021	9
2022	239
2023	9
2024	9
Thereafter	2,449
Principal amount	2,717
Senior notes \| 2025 Notes
Long Term Debt Maturities Repayments Of Principal [Line Items]
2020, remaining	0
2021	0
2022	0
2023	0
2024	0
Thereafter	500
Principal amount	500	$ 0
Senior notes \| 2026 Notes
Long Term Debt Maturities Repayments Of Principal [Line Items]
2020, remaining	0
2021	0
2022	0
2023	0
2024	0
Thereafter	750
Principal amount	750	750
Senior notes \| 2028 Notes
Long Term Debt Maturities Repayments Of Principal [Line Items]
2020, remaining	0
2021	0
2022	0
2023	0
2024	0
Thereafter	350
Principal amount	350	350
Convertible notes \| Convertible Notes, net
Long Term Debt Maturities Repayments Of Principal [Line Items]
2020, remaining	0
2021	0
2022	230
2023	0
2024	0
Thereafter	0
Principal amount	230	230
Corporate credit facility \| Term Loan
Long Term Debt Maturities Repayments Of Principal [Line Items]
2020, remaining	2
2021	9
2022	9
2023	9
2024	9
Thereafter	849
Principal amount	887	893
Corporate credit facility \| Revolving Corporate Credit Facility, net
Long Term Debt Maturities Repayments Of Principal [Line Items]
Principal amount	$ 0	$ 30

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in remainder of current fiscal year.

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long term debt and finance lease obligations, gross.

+ References

No definition available.

+ Details

Name:	vac_DebtAndFinanceLeaseObligationsGross
Namespace Prefix:	vac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long Term Debt Maturities Repayments Of Principal [Line Items]

+ References

No definition available.

+ Details

Name:	vac_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems
Namespace Prefix:	vac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Long-Term Debt, Maturity After Year Four

+ References

No definition available.

+ Details

Name:	vac_LongTermDebtMaturityAfterYearFour
Namespace Prefix:	vac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vac_A2025NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vac_A2026NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vac_A2028NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vac_ConvertibleSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=vac_CorporateCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vac_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vac_RevolvingCorporateCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: