Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] ILG, Inc ILG, Inc [Member] ILG, Inc [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Member relationships Customer Relationships [Member] Management contracts Management Contracts [Member] Management Contracts [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trade names and trademarks Trademarks and Trade Names [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Estimated Fair Value Finite-lived Intangible Assets Acquired Estimated Fair Value Indefinite-lived Intangible Assets Acquired Estimated Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Investments, All Other Investments [Abstract] Carrying Values and Estimated Fair Values of Financial Assets and Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Consideration Transfered Business Combination Consideration Transfered [Table Text Block] Business Combination Consideration Transfered [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Schedule of Future Minimum, Operating Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of Unrecognized Compensation Cost, Nonvested Awards Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] Assumptions Used to Estimate Fair Value of Grants Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions [Table Text Block] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions [Table Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Legacy ILG [Member] Legacy ILG [Member] Legacy ILG [Member] Legacy MVW [Member] Legacy MVW [Member] Legacy MVW [Member] Variable Interest Entities Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity Variable Interest Entity, Primary Beneficiary [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Debt Secured Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] 2018, remaining Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Net carrying amount of the liability component Long-term Debt FINANCIAL INSTRUMENTS Financial Instruments Disclosure [Text Block] Vacation ownership notes receivable Business Combination, Acquired Receivable, Fair Value Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Deferred Revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Deferred Revenue Deferred taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Securitized debt from VIEs Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Securitized Debt From Variable Interest Entity Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Securitized Debt From Variable Interest Entity Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Other Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Goodwill Goodwill Assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Guarantees and Product Warranties [Abstract] SUPPLEMENTAL GUARANTOR INFORMATION Condensed Financial Statements [Text Block] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Receivables [Abstract] VACATION OWNERSHIP NOTES RECEIVABLE Financing Receivables [Text Block] Inventory Disclosure [Abstract] Finished goods Inventory, Real Estate, Timeshare Available-for-sale Work-in-progress Inventory, Work in Process, Gross Real estate inventory Inventory Timeshare, Gross Total of (1) improvements, (2) held-for-sale, (3) land and land under development, and (4) construction-in-process. Operating supplies and retail inventory Operating Supplies and Inventories Operating Supplies and Inventories Inventory Inventory Timeshare Total of (1) improvements, (2) held-for-sale, (3) land and land under development, (4) construction-in-process, and (5) operating supplies, held in the normal course of business. Revenues Business Acquisition, Pro Forma Revenue Net income (loss) Business Acquisition, Pro Forma Net Income (Loss) Net income (loss) attributable to common stockholders Business Acquisition, Pro Forma Net income, Attributable To Parent Business Acquisition, Pro Forma Net income, Attributable To Parent (LOSSES) EARNINGS PER SHARE ATTRIBUTABLE TO COMMON SHAREHOLDERS Earnings Per Share, Pro Forma [Abstract] Basic (in usd per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted (in usd per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Financing Receivable [Axis] Financing Receivable [Axis] Financing Receivable [Axis] Financing Receivable [Domain] Financing Receivable [Domain] [Domain] for Financing Receivable [Axis] Acquired Acquired [Member] Acquired [Member] Originated Originated [Member] Originated [Member] Products and Services Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Securitized Vacation Ownership Notes Receivable Securitized Vacation Ownership Notes Receivable [Member] Securitized vacation ownership notes receivable Non-Securitized Vacation Ownership Notes Receivable Nonsecuritized Vacation Ownership Notes Receivable [Member] Nonsecuritized vacation ownership notes receivable Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Eligible for securitization Eligible for Securitization [Member] Eligible for Securitization [Member] Not eligible for securitization Not Eligible for Securitization [Member] Not Eligible for Securitization [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Fair Value Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Vacation ownership notes receivable, net Financing Receivable, Net Amount of completed vacation ownership units classified as property and equipment Amount Of Completed Vacation Ownership Units Classified As Property And Equipment Amount Of Completed Vacation Ownership Units Classified As Property And Equipment Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] ILG Affiliated Entity [Member] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] 30-59 Days Financing Receivables, 30 to 59 Days Past Due [Member] 60-89 Days Financing Receivables, 60 to 89 Days Past Due [Member] 90-119 Days Financing Receivables90 To119 Days Past Due [Member] Financing receivables that are more than 89 days past due but fewer than 120 days past due. Greater than 120 Days Financing Receivables Equal To Greater Than120 Days Past Due [Member] Financing receivables that are equal to or greater than 120 days past due. Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Receivables Accounts, Notes, Loans and Financing Receivable, Net, Current Current Financing Receivable, Recorded Investment, Current Delinquent & Defaulted Financing Receivable, Recorded Investment, Past Due Organization, Consolidation and Presentation of Financial Statements [Abstract] VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] Revenue from Contract with Customer [Abstract] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Corporate and other Corporate, Non-Segment [Member] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Services transferred over time Transferred over Time [Member] Goods or services transferred at a point in time Transferred at Point in Time [Member] Business Segments Segments [Axis] Segments [Domain] Segments [Domain] Vacation Ownership Vacation Ownership [Member] Vacation Ownership [Member] Exchange & Third-Party Management Exchange and Third-Party Management [Member] Exchange and Third-Party Management [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Composition of Inventory Inventory [Table Text Block] Inventory Table Accounting Policies [Abstract] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Securitized debt Non Recourse Debt [Member] Non Recourse Debt Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Conforming Reclassifications Restatement Adjustment [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Percent of the assets, liabilities, revenues, expenses and cash flows discussed Percentage of Assets, Liabilities, Revenues, Expenses and Cash Flows Consolidated and Discussed Percentage of Assets, Liabilities, Revenues, Expenses and Cash Flows Consolidated and Discussed Property and equipment Property, Plant and Equipment, Net Inventory Principal amount Long-term Debt, Gross Debt, net Debt And Capital Lease Obligations Net Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long term debt and capital lease obligations, net of unamortized discount and debt issuance costs. Securitized debt, net Secured Debt Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Time Sharing Transactions, Allowance for Uncollectible Accounts [Roll Forward] Time Sharing Transactions, Allowance for Uncollectible Accounts [Roll Forward] December 31, 2017 Time Sharing Transactions, Allowance for Uncollectible Accounts Increase in vacation ownership notes receivable reserve Provision for Loan Losses Expensed Securitizations Securitized Financing Receivable Securitized Financing Receivable Clean-up call Time Sharing Transactions, Clean-Up Of Warehouse Credit Facility Time Sharing Transactions, Clean-Up Of Warehouse Credit Facility Write-offs Time Sharing Transactions, Allowance for Uncollectible Accounts, Deductions for Direct Write-offs Charged Against Allowance Defaulted vacation ownership notes receivable repurchase activity Financing Receivable, Allowance for Credit Losses, Repurchase Activity Financing Receivable, Allowance for Credit Losses, Repurchase Activity September 30, 2018 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Loss Contingency Nature Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Information technology hardware and software Information Systems and Technology [Member] Information Systems and Technology Insurance Claim, Hurricane Irma Insurance Claim, Hurricane Irma [Member] Insurance Claim, Hurricane Irma [Member] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Domain] Property Subject to or Available for Operating Lease [Domain] Facility And Other Operating Leases Facility And Other Operating Leases [Member] Facility And Other Operating Leases [Member] Geographical Geographical [Axis] Geographical [Domain] Geographical [Domain] New York City, New York New York City [Member] New York City [Member] Bali Indonesia Resort Two Bali, Indonesia Resort Two [Member] Bali, Indonesia Resort Two [Member] San Francisco, California San Francisco California [Member] San Francisco California [Member] Purchase Commitment, Excluding Long-term Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment [Domain] Purchase Commitment, Excluding Long-term Commitment [Domain] Commitment to purchase vacation ownership units located in Marco Island, Florida Marco Island Florida [Member] Marco Island Florida [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Corporate Credit Facility Corporate Credit Facility [Member] Corporate Credit Facility [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving corporate credit facility, net Revolving Credit Facility [Member] North America North America Segment [Member] North America Segment [Member] Europe Europe Segment [Member] Europe Segment. Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Settled Litigation Agreements In Principle To Settle [Member] Agreements In Principle To Settle [Member] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Domain] Unusual or Infrequent Item, or Both [Domain] Fraudulently Induced Electronic Payment Disbursements Fraudulently Induced Electronic Payment Disbursements [Member] Fraudulently Induced Electronic Payment Disbursements [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] William and Sharon Petrick Case William and Sharon Petrick Case [Member] William and Sharon Petrick Case [Member] Acquisition of ILG Acquisition of ILG [Member] Acquisition of ILG [Member] The Ritz-Carlton, Lake Tahoe The Ritz-Carlton, Lake Tahoe [Member] The Ritz-Carlton, Lake Tahoe [Member] Kapalua Bay Settlement Kapalua Bay Settlement [Member] Kapalua Bay Settlement [Member] RCC-Aspen Highlands Ritz Carlton Club, Aspen Highlands [Member] Ritz Carlton Club, Aspen Highlands [Member] Fifth and Fifty-Fifth Residence Club Fifth and Fifty-Fifth Residence Club [Member] Fifth and Fifty-Fifth Residence Club [Member] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Purchase commitment Purchase Obligation Purchase commitment obligation due, 2018 Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year Purchase commitment obligation due, 2019 Purchase Obligation, Due in Second Year Purchase commitment obligation due, 2020 Purchase Obligation, Due in Third Year Purchase commitment obligation due, 2021 Purchase Obligation, Due in Fourth Year Purchase commitment obligation due, 2022 Purchase Obligation, Due in Fifth Year Purchase commitment obligation due, thereafter Purchase Obligation, Due after Fifth Year Commitments to subsidize associations Commitments To Subsidize Associations Commitments To Subsidize Associations Capital leases, future minimum payments due Capital Leases, Future Minimum Payments Due Number of vacation ownership units expected to be acquired Expected Number of Ownership Units to be Acquired Expected Number of Ownership Units to be Acquired Surety bonds issued Surety Bonds Surety Bonds issued. Letters of credit outstanding Letters of Credit Outstanding, Amount Credit facility Line of Credit Facility, Maximum Borrowing Capacity Guarantor obligations, maximum exposure, Undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Number of plaintiffs in lawsuits Loss Contingency, Number of Plaintiffs Number of plaintiffs, released claims Loss Contingency, Number of Plaintiffs, Released Claims Loss Contingency, Number of Plaintiffs, Released Claims Litigation settlement Gain (Loss) Related to Litigation Settlement New claims filed Loss Contingency, New Claims Filed, Number Estimate of possible loss Fraudulently Induced Electronic Payment Disbursements Made To Third Parties Fraudulently Induced Electronic Payment Disbursements Made To Third Parties Recovery of funds Recovered Fraudulently Induced Electronic Payment Disbursements made to Third Parties Recovered Fraudulently Induced Electronic Payment Disbursements made to Third Parties Amount recorded in Gains (losses) and other income (expense) Gains (Losses) And Other Income (Expense), Net Gains (Losses) And Other Income (Expense), Net Insurance claim receivable Loss Contingency, Receivable, Current Sale of vacation ownership products Time Share [Member] Ancillary revenues Ancillary Revenues [Member] Ancillary Revenues Management fee revenues Management Service [Member] Other services revenues Service, Other [Member] Resort management and other services Management And Exchange [Member] Management And Exchange Rental Rental [Member] Rental [Member] Cost reimbursements Revenues, Cost Reimbursement Revenues, Cost Reimbursement Financing Financing Revenue Not From Contract With Customer Financing revenues include interest income earned on vacation ownership notes receivable, fees earned from servicing the existing vacation ownership notes receivable portfolio, and other transaction-based fees charged to owners and other third parties for services. TOTAL REVENUES Revenues Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of reportable business segments Number of Reportable Segments Number of resorts (more than) Number of Resorts Number of Resorts Number of owners and/or members Number of Owners and/or Members Number of Owners and/or Members Number of vacation ownership brands Number of Brands Number of Brands Number of nations (over) Number of Nations Number of Nations Number of members Number Of Members Number Of Members Number of other resorts and lodging properties (more than) Number of Properties Number of Properties Percentage of revenue outside of the United States Revenue, Operations Outside of United States, Percentage Revenue, Operations Outside of United States, Percentage Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Marco Island Florida Florida FLORIDA Notes Receivable Notes Receivable [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Note receivable Notes, Loans and Financing Receivable, Gross, Noncurrent Maximum loss (less than) Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Capital lease asset Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Noncurrent Capital lease liability Capital Lease Obligations Number of vacation ownership units acquired Number Of Vacation Ownership Units Acquired Number Of Vacation Ownership Units Acquired Other assets Other Assets Other liabilities Other Liabilities Cash surrender value of life insurance Cash Surrender Value of Life Insurance Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Warehouse Credit Facility Warehouse Credit Facility [Member] Warehouse Credit Facility [Member] Trust Entity [Axis] Trust Entity [Axis] Trust Entity [Axis] Trust Entity [Domain] Trust Entity [Domain] [Domain] for Trust Entity [Axis] Mvw Holding Mvw Holding [Member] Mvw Holding [Member] 2018-01 Trust 2018-01 Trust [Member] 2018-01 Trust [Member] 2018-A Trust 2018-A Trust [Member] 2018-A Trust [Member] Debt Secured Debt [Member] Class A Notes Class A Notes [Member] Class A Notes [Member] Class B Notes Class B Notes [Member] Class B Notes [Member] Class C Notes Class C Notes [Member] Class C Notes [Member] Values of vacation ownership notes receivable that were securitized during the period Values of Vacation Ownership Notes Receivable that Were Purchased By Trust During the Period Values of Vacation Ownership Notes Receivable that Were Purchased By Trust During the Period Borrowings from securitization transactions Proceeds from Issuance of Secured Debt Decrease in restricted cash Decrease in Restricted Cash Proceeds from vacation ownership notes receivable securitizations Proceeds from Accounts Receivable Securitization Principal amount Debt Instrument, Face Amount Debt, stated interest rate Debt Instrument, Interest Rate, Stated Percentage Debt, weighted average interest rate Debt, Weighted Average Interest Rate Restricted cash Restricted Cash and Cash Equivalents Number of notes receivable pools under performance triggers Number of Notes Receivable Pools Under Performance Triggers Number of Notes Receivable Pools Under Performance Triggers Number of notes receivable pools outstanding Number of Consolidated Notes Receivable Pools Outstanding Number of Consolidated Notes Receivable Pools Outstanding Period of time that amounts outstanding are due upon termination of facility Credit Facility, Payable Period After Termination Credit Facility, Payable Period After Termination Line of credit Long-term Line of Credit Condensed Financial Statements [Table] Condensed Financial Statements [Table] MVW Parent Company [Member] Interval Acquisition Corp. Subsidiary Issuer [Member] Guarantor Subsidiaries Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries Non-Guarantor Subsidiaries [Member] Total Eliminations Consolidation, Eliminations [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Net cash and restricted cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Net cash and restricted cash used in investing activities Net Cash Provided by (Used in) Investing Activities Net cash and restricted cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Cash, cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Operating Leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2018, remaining Operating Leases, Future Minimum Payments, Remainder of Fiscal Year 2019 Operating Leases, Future Minimum Payments, Due in Two Years 2020 Operating Leases, Future Minimum Payments, Due in Three Years 2021 Operating Leases, Future Minimum Payments, Due in Four Years 2022 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due Senior Unsecured Notes Senior Unsecured Notes [Member] Senior Unsecured Notes [Member] Exchange Notes, net Senior Exchange Notes [Member] Senior Exchange Notes [Member] IAC Notes IAC Notes [Member] IAC Notes [Member] Term Loan Term Loan [Member] Term Loan [Member] Convertible Notes Convertible Senior Notes [Member] Convertible Senior Notes [Member] Non-Interest Bearing Note Payable Non-Interest Bearing Note Payable [Member] Non-Interest Bearing Note Payable [Member] Senior Notes Senior Notes [Member] Non-interest bearing note payable, net Notes Payable, Other Payables [Member] Other debt, net Other Debt [Member] Other Debt Securitized Non-Securitized Other Total financial assets Instruments, Financial Assets Instruments, Financial Assets Securitized debt Debt, net Debt, gross Debt And Capital Lease Obligations Gross Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long term debt and capital lease obligations, gross. Total financial liabilities Instruments, Financial Liabilities Instruments, Financial Liabilities Revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Net loss Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Resort management and other services Resort Management and Other Services [Member] Resort Management and Other Services [Member] Management and exchange Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] As Reported Calculated under Revenue Guidance in Effect before Topic 606 [Member] ASC 606 Adjustments Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] REVENUES Revenues [Abstract] Financing EXPENSES Costs and Expenses [Abstract] Expenses Cost of Goods and Services Sold Marketing and sales Selling and Marketing Expense Financing Financing Expense Not From Contract With Customer Financing expenses include costs in support of the financing, servicing and securitization processes. General and administrative General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Consumer financing interest Consumer Financing Interest Expense Consumer financing interest expense represents interest expense associated with the debt from our non-recourse warehouse credit facility and from the securitization of our vacation ownership notes receivable in the asset-backed securities market. Royalty fee Royalty Expense Cost reimbursements Cost Reimbursements, Expense Cost Reimbursements, Expense TOTAL EXPENSES Costs and Expenses Gains and other income, net Interest expense Interest Income (Expense), Nonoperating, Net ILG acquisition costs Business Combination, Acquisition Related Costs Other Other Nonoperating Expense (LOSS) INCOME BEFORE INCOME TAXES AND NONCONTROLLING INTERESTS Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax Provision for income taxes Income Tax Expense (Benefit) NET INCOME Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest NET (LOSS) INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS Net Income (Loss) Attributable to Parent Basic (loss) earnings per share (in usd per share) Earnings Per Share, Basic Diluted (loss) earnings per share (in usd per share) Earnings Per Share, Diluted Income Tax Contingency [Table] Income Tax Contingency [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Unrecognized tax benefits that, if recognized, would impact the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Effective income tax rate, percent Effective Income Tax Rate Reconciliation, Percent Decrease in income tax expense Tax Cuts And Jobs Act Of 2017 Incomplete Accounting Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017 Incomplete Accounting Provisional Income Tax Expense (Benefit) Decrease net deferred tax liability Tax Cuts And Jobs Act Of 2017 Incomplete Accounting Change In Tax Rate Deferred Tax Liability Provisional Income Tax Benefit Tax Cuts and Jobs Act of 2017 Incomplete Accounting Change in Tax Rate Deferred Tax Liability Provisional Income Tax Benefit Unamortized debt issuance costs Unamortized Debt Issuance Expense Secured Debt, Net Secured Debt, Net Secured Debt, Net Equity [Abstract] Dividend per share (in usd per share) Common Stock, Dividends, Per Share, Declared SECURITIZED DEBT Securitized Vacation Ownership Debt Disclosure [Text Block] The entire disclosure for securitized vacation ownership debt. Our Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Acquisition of ILG and Business Combinations Business Combinations Policy [Policy Text Block] Goodwill, Intangibles and Long-Lived Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Future Adoption of Accounting Standards Future Adoption of New Accounting Standards Policy [Policy Text Block] Future Adoption of New Accounting Standards Policy [Policy Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Service-based RSUs Service Based Restricted Stock Unit [Member] Service Based Restricted Stock Unit [Member] Performance-based RSUs Performance Based Restricted Stock Unit [Member] Performance Based Restricted Stock Unit [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] SARs Stock Appreciation Rights (SARs) [Member] Stock options Marriott Vacations Worldwide Corporation [Member] Marriott Vacations Worldwide Corporation Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Deferred compensation costs related to unvested awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Accounts receivable, net Accounts Receivable, Net Accrued liabilities Accrued Liabilities Other Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, Par (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Treasury stock, shares (in shares) Treasury Stock, Shares Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Private Warrants Private Warrants [Member] Private Warrants [Member] Antidilutive Securities Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Performance Shares Performance Shares [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Exercise price of warrants (in usd per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Shares excluded from the calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Reportable Legal Entities Reportable Legal Entities [Member] Revenues Expenses ILG acquisition-related costs Income tax benefit Net (loss) income attributable to common shareholders EARNINGS PER SHARE Earnings Per Share [Text Block] Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Risk-free rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Stockholders' Equity [Table] Stockholders' Equity [Table] Stockholders' Equity [Table] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] VRI Europe Limited VRI Europe Limited [Member] VRI Europe Limited [Member] CLC World Resorts and Hotels CLC World Resorts and Hotels [Member] CLC World Resorts and Hotels [Member] Property Owners Associations Property Owners Associations [Member] Property Owners Associations [Member] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Common stock, par (in dollars per share) Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Share repurchase program, number of common stock authorized to be repurchased (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Shares remained available for repurchase under the program (in shares) Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Noncontrolling interest, ownership percentage by parent Noncontrolling Interest, Ownership Percentage by Parent Noncontrolling interest, ownership percentage by noncontrolling interest Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Principal amount Note Receivable From Noncontrolling Interest, Fair Value Note Receivable From Noncontrolling Interest, Fair Value Premium percentage, convertible loan facility Premium Upon Exercise Of Share Options To Settle Loan As Percent Premium upon exercise of share options to settle loan as a percent Schedule of New Accounting Pronouncement Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Marketable securities Marketable Securities Notes receivable Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Vacation Ownership Notes Receivable Securitizations Vacation Ownership Notes Receivable Securitizations [Member] Vacation Ownership Notes Receivable Securitizations [Member] Cash Inflows Cash Inflows [Abstract] Cash Inflows [Abstract] Net proceeds from vacation ownership notes receivable securitizations Proceeds from (Repayments of) Accounts Receivable Securitization Principal receipts Cash Flows Between Transferee And Transferor Proceeds From Principal Receipts Cash Flows Between Transferee And Transferor Proceeds From Principal Receipts Interest receipts Cash Flows Between Transferee And Transferor Proceeds From Interest Receipts Cash Flows Between Transferee And Transferor Proceeds From Interest Receipts Reserve release Cash Flows Between Transferee and Transferor Reserve Release Cash Flows Between Transferee and Transferor Reserve Release Total Cash Flows Between Transferee And Transferor Proceeds Cash Flows Between Transferee And Transferor Proceeds Cash Outflows Cash Outflows [Abstract] Cash Outflows [Abstract] Principal to investors Cash Flows Between Transferee And Transferor Repayments Of Principal To Investors Cash Flows Between Transferee And Transferor Repayments Of Principal To Investors Voluntary repurchases of defaulted vacation ownership notes receivable Defaulted Mortgage Loans Repurchased The amount of defaulted mortgage notes receivable that were voluntarily repurchased for the period. Voluntary clean-up call Cash Flows Between Transferor and Transferee, Payment to Purchaser Cash Flows Between Transferor and Transferee, Payment to Purchaser Repayment of Warehouse Credit Facility Cash Flows Between Transferee And Transfer or Repayments Of Warehouse Credit Facility Cash Flows Between Transferee And Transfer or Repayments Of Warehouse Credit Facility Interest to investors Cash Flows Between Transferee And Transferor Repayments Of Interest To Investors Cash Flows Between Transferee And Transferor Repayments Of Interest To Investors Funding of restricted cash Cash Flows Between Transferee And Transfer or Funding Of Restricted Cash Cash Flows Between Transferee And Transfer or Funding Of Restricted Cash Total Cash Flows Between Transferee And Transferor Repayments Cash Flows Between Transferee And Transferor Repayments Net Cash Flows Cash Flows Between Transferee and Transferor Net Cash Flows Between Transferee And Transferor Net. DEBT Debt Disclosure [Text Block] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Investment in notes receivable on non-accrual status Financing Receivable, Recorded Investment, Nonaccrual Status Average investment in notes receivable on non-accrual status Financing Receivable Average Investment Nonaccrual Loans Financing Receivable Average Investment Nonaccrual Loans Deferred Share Units Deferred Share Units [Member] Deferred Share Units [Member] Cash-Based Award Cash-Based Award [Member] Cash-Based Award [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Employees and Non Employee Directors Employees And Non Employee Directors [Member] Employees And Non Employee Directors [Member] Shares authorized for issuance under the plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares available for grants under the plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Stock awards, grants in period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock awards granted, weighted average (in usd per share) grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Maximum amount of RSU subject to vesting (in shares) Maximum Performance Awards Maximum amount of Restricted Stock Units that may vest under performance-based vesting criteria. Business combination, share conversion ratio Business Acquisition, Equity Interests Issuable By Shares Owned Business Acquisition, Equity Interests Issuable By Shares Owned Business combination, share price (in usd per share) Business Acquisition, Share Price Stock awards granted, weighted average (in usd per share) exercise date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted Weighted Average Exercise Price Weighted average grant date fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based compensation expense Allocated Share-based Compensation Expense Compensation not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Equity instruments other than options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Payroll and benefits liability Employee-related Liabilities Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Axis] Deferred Revenue [Domain] Deferred Revenue [Domain] Advance deposits Up-front Payment Arrangement [Member] Deferred revenue Deferred Revenue [Member] Deferred Revenue [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Intangibles, net Intangible Assets, Net (Excluding Goodwill) Investments in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures TOTAL ASSETS Assets Accounts payable Accounts Payable Contract Liabilities Contract with Customer, Liability Deferred compensation liability Deferred Compensation Liability, Current and Noncurrent Debt, net Deferred taxes Deferred Tax Liabilities, Net Intercompany liabilities (receivables) / equity Related Party Transaction, Due from (to) Related Party MVW shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests TOTAL LIABILITIES AND EQUITY Liabilities and Equity Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Operating Segments Operating Segments [Member] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Credit Score, FICO [Axis] Credit Score, FICO [Axis] Credit Score, FICO [Domain] Credit Score, FICO [Domain] 700 FICO Score, Greater than 700 [Member] 600 - 699 FICO Score, 600 to 699 [Member] 600 Fico Score Less Than600 [Member] Less than 600 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score Greater Than [low end numeric value] [Member] or FICO Score Less Than [high end numeric value] [Member] formats. No Score Nil Fico Score [Member] Nil credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score Greater Than [low end numeric value] [Member] or FICO Score Less Than [high end numeric value] [Member] formats. Westin Westin [Member] Represents the information pertaining to Westin brand. Sheraton Sheraton [Member] Represents the information pertaining to Sheraton brand. Hyatt Hyatt [Member] Represents the information pertaining to Hyatt brand. Other Brand, Other [Member] Represents the information pertaining to the other brands, which are not specifically mentioned. Vacation notes receivable Loans and Leases Receivable, Gross, Consumer, Mortgage Interest income Interest On Notes Receivable Interest On Notes Receivable Income Statement [Abstract] Rental Gains (losses) and other income (expense), net Benefit (provision) for income taxes NET (LOSS) INCOME (LOSSES) EARNINGS PER SHARE ATTRIBUTABLE TO COMMON SHAREHOLDERS Basic (in usd per share) Diluted (in usd per share) CASH DIVIDENDS DECLARED PER SHARE (in usd per share) INVENTORY Inventory Disclosure [Text Block] Reconciliation of Earnings and Number of Shares Used in Calculation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Table] Debt Disclosure [Table] Debt Disclosure [Table] Big Island Of Hawaii Big Island Of Hawaii [Member] Big Island Of Hawaii [Member] Debt Conversion Description [Axis] Debt Conversion Description [Axis] Debt Conversion, Name [Domain] Debt Conversion, Name [Domain] Conversion Premium, Stock Price Exceeds The Conversion Price Conversion Premium, Stock Price Exceeds The Conversion Price [Member] Conversion Premium, Stock Price Exceeds The Conversion Price [Member] Convertible Note Hedges Convertible Note Hedges [Member] Convertible Note Hedges [Member] Revolving Corporate Credit Facility Revolving Corporate Credit Facility [Member] Revolving Corporate Credit Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Variable Rate Margin Floating Rate [Member] Floating Rate [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Letter of Credit Letter of Credit [Member] Convertible Debt Convertible Debt [Member] Debt Disclosure [Line Items] Debt Disclosure [Line Items] Debt Disclosure [Line Items] Payment of debt exchange expense Payments of Debt Issuance Costs Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Debt instrument, repurchased face amount Debt Instrument, Repurchased Face Amount Debt instrument, repurchase amount Repayments of Debt Proceeds from issuance of Senior Unsecured Notes Proceeds from Issuance of Senior Long-term Debt Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Line of credit facility, commitment fee basis points Line of Credit Facility, Commitment Fee Percentage Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Debt instrument, convertible, conversion price (in usd per share) Debt Instrument, Convertible, Conversion Price Net carrying amount of the liability component Carrying amount of equity component, net of issuance costs Debt Instrument, Convertible, Carrying Amount of Equity Component Unamortized debt issuance costs Debt Issuance Costs, Gross Debt instrument, convertible, remaining discount amortization period Debt Instrument, Convertible, Remaining Discount Amortization Period Option indexed to issuer's equity, indexed shares (in shares) Option Indexed to Issuer's Equity, Indexed Shares Number of securities called by warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Percentage above common stock price to conversion price of convertible debt when instrument is eligible for conversion Percentage Above Common Stock Price To Conversion Price Of Convertible Debt When Instrument Is Eligible For Conversion Percentage Above Common Stock Price To Conversion Price Of Convertible Debt When Instrument Is Eligible For Conversion Effective percentage above common stock price to conversion price of convertible debt, as effected by convertible note hedge and warrant transactions Effective Percentage Above Common Stock Price To Conversion Price Of Convertible Debt, As Effected By Convertible Note Hedge And Warrant Transactions Effective Percentage Above Common Stock Price To Conversion Price Of Convertible Debt, As Effected By Convertible Note Hedge And Warrant Transactions. Number of convertible note hedges exercised (in shares) Convertible Note Hedges Exercised Convertible note hedges exercised Number of warrants exercised (in shares) Class Of Warrant Or Right, Number Of Warrants Exercised Class of Warrant or Right, Number Of Warrants Exercised Repayment of non-interest bearing note payable Repayments of Notes Payable Non-cash issuance of debt in connection with acquisition of vacation ownership units Statement of Stockholders' Equity [Abstract] Equity Components Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Treasury Stock Treasury Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Retained Earnings Retained Earnings [Member] Total MVW Shareholders' Equity Parent [Member] Noncontrolling Interests Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance (in shares) Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net loss Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest ILG Acquisition (in shares) Stock Issued During Period, Shares, Acquisitions ILG Acquisition Stock Issued During Period, Value, Acquisitions Derivative instrument adjustment Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Amounts related to share-based compensation (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Amounts related to share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options Repurchase of common stock (in shares) Treasury Stock, Shares, Acquired Repurchase of common stock Treasury Stock, Value, Acquired, Cost Method Dividends Dividends Balance (in shares) Balance Revenue remaining performance obligation expected timing percentage Revenue Remaining Performance Obligation Expected Timing Percentage The percentage of the remaining performance obligation that is expected to be recognized in the period Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Vacation ownership notes receivable, net of reserves Vacation Ownership Notes Receivable [Member] Vacation Ownership Notes Receivable [Member] Interest receivable Interest Receivable [Member] Interest Receivable Restricted cash Restricted Cash [Member] Restricted Cash Interest payable Interest Payable [Member] Interest Payable VIE Assets Variable Interest Entity, Consolidated, Carrying Amount, Assets VIE Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Classifications of Consolidated VIE Assets and Liabilities Schedule of Variable Interest Entities [Table Text Block] Interest Income and Expense Recognized as a Result of Our Involvement with Variable Interest Entities Interest Income and Interest Expense Disclosure [Table Text Block] Cash Flows Between Company and Variable Interest Entities Cash Flows Between Securitization Special Purpose Entity SPE And Transferor Text Block Cash Flows Between Securitization Special Purpose Entity SPE And Transferor Text Block Future Minimum Payments Receivable [Table] Future Minimum Payments Receivable [Table] Future Minimum Payments Receivable [Table] Weighted Average Weighted Average [Member] Future Minimum Payments Receivable [Line Items] Future Minimum Payments Receivable [Line Items] Future Minimum Payments Receivable [Line Items] 2018, remaining Time Sharing Transactions, Maturities of Notes Receivable, Year One 2019 Time Sharing Transactions, Maturities of Notes Receivable, Year Two 2020 Time Sharing Transactions, Maturities of Notes Receivable, Year Three 2021 Time Sharing Transactions, Maturities of Notes Receivable, Year Four 2022 Time Sharing Transactions, Maturities of Notes Receivable, Year Five Thereafter Time Sharing Transactions, Maturities of Notes Receivable, Future Years Total Vacation ownership notes receivable, net of reserve Time Sharing Transactions, Maturities of Notes Receivable, Net Interest rates Time-sharing Transactions, Stated Interest Rate for Notes Receivable Class of Treasury Stock [Table] Class of Treasury Stock [Table] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Stock Repurchase [Roll Forward] Stock Repurchase [Roll Forward] Stock Repurchase [Roll Forward] Number of Shares Repurchased (in shares) Cost of Shares Repurchased Treasury Stock, Value, Gross Treasury Stock, Value, Gross Average Price Paid per Share (in usd per share) Stock Repurchased, Per Share Average Price Stock Repurchased, Per Share Average Price Cost of Shares Repurchased Average Price Paid per Share (in usd per share) Treasury Stock Acquired, Average Cost Per Share Number of Shares Repurchased (in shares) Cost of Shares Repurchased Average Price Paid per Share (in usd per share) Stock Repurchase Activity under Current Stock Repurchase Program Class of Treasury Stock [Table Text Block] Cash Dividend Declared Dividends Declared [Table Text Block] Adjustments ASSETS Assets [Abstract] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] TOTAL LIABILITIES Liabilities Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Treasury stock Treasury Stock, Value Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Composition of Vacation Ownership Notes Receivable Balances, Net of Reserves Notes Receivable, Balances, Net Of Reserves [Table Text Block] Notes Receivable, Balances, Net Of Reserves [Table Text Block] Interest Income Associated with Vacation Ownership Notes Receivable Schedule Of Components Of Investment Income Included In Interest Income Table [Text Block] Interest Income associated with vacation ownership notes receivable. Schedule Of Accretable Yield Schedule Of Accretable Yield [Table Text Block] Schedule Of Accretable Yield [Table Text Block] Future Principal Payments, Net of Reserves, and Interest Rates of Vacation Ownership Notes Receivable Schedule of Financing Receivables, Minimum Payments [Table Text Block] Notes Receivable Reserves Allowance for Credit Losses on Financing Receivables [Table Text Block] Recorded Investment in Non-accrual Notes Receivable that are 90 Days or More Past Due Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Aging of Recorded Investment in Principal, Before Reserves, in Vacation Ownership Notes Receivable Past Due Financing Receivables [Table Text Block] Financing Receivable Credit Quality Indicators Financing Receivable Credit Quality Indicators [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] Debt, gross Unamortized debt issuance costs Unamortized debt discount and issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Unamortized discount Debt Instrument, Unamortized Discount Debt, net Capital leases Effective percentage Debt Instrument, Interest Rate, Effective Percentage Revenues Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Net Income (Loss) Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] SHARE-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Balance at Acquisition Date Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Acquired accretable yield Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions Accretion of acquired vacation ownership notes receivable Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Reclassification from non-accretable difference Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference Balance at September 30, 2018 Non-accretable difference at September 30, 2018 Certain Loans Acquired in Transfer, Nonaccretable Difference Schedule of Securitized Vacation Ownership Debt Schedule of Securitized Vacation Ownership Debt [Table Text Block] Tabular disclosure of the securitized vacation ownership debt of the variable interest entities. Scheduled Future Principal Payments for Debt Schedule of Maturities of Long-term Debt [Table Text Block] 31 – 90 days past due Financing Receivables, 31 To 90 Days Past Due [Member] Financing Receivables, 31 To 90 Days Past Due [Member] 91 – 150 days past due Financing Receivables, 91 To 150 Days Past Due [Member] Financing Receivables, 91 To 150 Days Past Due [Member] Greater than 150 days past due Financing Receivables, Greater than 150 Days Past Due [Member] Financing Receivables, Greater than 150 Days Past Due [Member] Total past due Total vacation ownership notes receivable Financing Receivable, Gross REVENUE Revenue from Contract with Customer [Text Block] ADOPTION IMPACT OF NEW REVENUE STANDARD Statement of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Net (loss) income Adjustments to reconcile net (loss) income to net cash and restricted cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization of intangibles Amortization of Intangible Assets Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs and Discounts Vacation ownership notes receivable reserve Provision for Loan and Lease Losses Share-based compensation Share-based Compensation Deferred income taxes Noncash Income Tax (Expense) Benefit The non-cash component of income tax expense, less the tax benefit from the exercise of stock options, SARs and RSUs. Net change in assets and liabilities, net of the effects of acquisition: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts and Other Receivables Vacation ownership notes receivable originations Increase (Decrease) in Notes Receivable Originations The (increase) decrease during the reporting period in the total amount of new mortgage loans originated on real estate. Vacation ownership notes receivable collections Increase (Decrease) in Notes Receivable Collections The increase (decrease) during the reporting period in the amount of principal collections on mortgage loans on real estate. Inventory Increase (Decrease) in Inventories Purchase of vacation ownership units for future transfer to inventory Purchase Of Vacation Ownership Units For Future Transfer To Inventory Purchase Of Vacation Ownership Units For Future Transfer To Inventory Other assets Increase (Decrease) in Other Operating Assets Accounts payable, advance deposits and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Contract with Customer, Liability Payroll and benefit liabilities Increase (Decrease) in Employee Related Liabilities Deferred compensation liability Increase (Decrease) in Deferred Compensation Other liabilities Increase (Decrease) in Other Operating Liabilities Other, net Other Operating Activities, Cash Flow Statement Net cash and restricted cash provided by operating activities INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of a business, net of cash and restricted cash acquired Payments to Acquire Businesses, Net of Cash And Restricted Cash Acquired Payments to Acquire Businesses, Net of Cash And Restricted Cash Acquired Capital expenditures for property and equipment (excluding inventory) Payments to Acquire Property, Plant, and Equipment Purchase of company owned life insurance Payments for (Proceeds from) Life Insurance Policies Net cash and restricted cash used in investing activities FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Repayment of debt related to securitization transactions Repayments of Secured Debt Proceeds from debt Proceeds from Issuance of Debt Repayments of debt Purchase of Convertible Note Hedges Payments for Derivative Instrument, Financing Activities Proceeds from issuance of Warrants Proceeds from Issuance of Warrants Debt issuance costs Repurchase of common stock Payments for Repurchase of Common Stock Payment of dividends Payments of Dividends Payment of withholding taxes on vesting of restricted stock units Restricted Stock, Value, Shares Issued Net of Tax Withholdings Effect of changes in exchange rates on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash issuance of debt in connection with acquisition of vacation ownership units Noncash or Part Noncash Acquisition, Debt Assumed Non-cash issuance of stock in connection with ILG Acquisition Stock Issued Dividends payable Dividends Payable SUPPLEMENTAL DISCLOSURES Supplemental Cash Flow Information [Abstract] Interest paid, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes paid, net of refunds Income Taxes Paid, Net Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Revenue Recognition, Multiple-deliverable Arrangements [Line Items] Revenue Recognition, Multiple-deliverable Arrangements [Line Items] Receivables Contract with Customer, Asset, Net [Abstract] Accounts receivable Contracts With Customers, Accounts Receivable The right to consideration that is unconditional from contracts with customers that is classified within accounts receivable Receivables Contract with Customer, Receivable The total right to consideration that is unconditional from contracts with customers Contract Liabilities Contract with Customer, Liability [Abstract] Restricted cash (including $130 and $32 from VIEs, respectively) Accounts receivable, net (including $10 and $6 from VIEs, respectively) Vacation ownership notes receivable, net (including $1,557 and $814 from VIEs, respectively) Other (including $28 and $14 from VIEs, respectively) Accrued liabilities (including $2 and $1 from VIEs, respectively) Securitized debt, net (including $1,701 and $845 from VIEs, respectively) Contingencies and Commitments (Note 9) Commitments and Contingencies Preferred stock — $0.01 par value; 2,000,000 shares authorized; none issued or outstanding Common stock — $0.01 par value; 100,000,000 shares authorized; 57,611,046 and 36,861,843 shares issued, respectively Treasury stock — at cost; 10,405,594 and 10,400,547 shares, respectively TOTAL MVW SHAREHOLDERS' EQUITY TOTAL EQUITY Segment Reporting, Reconciliation of Net Income (Loss) Segment to Consolidated [Table] Segment Reporting, Reconciliation of Net Income (Loss) Segment to Consolidated [Table] Segment Reporting, Reconciliation of Net Income (Loss) Segment to Consolidated [Table] Segment Reporting, Reconciliation of Net Income (Loss) Segment to Consolidated [Line Items] Segment Reporting, Reconciliation of Net Income (Loss) Segment to Consolidated [Line Items] Segment Reporting, Reconciliation of Net Income (Loss) Segment to Consolidated [Line Items] Segment financial results Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net (loss) income Interest expense to investors Interest Expense, Related Party Debt issuance cost amortization Amortization of Debt Issuance Costs ACQUISITIONS AND DISPOSITIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Derivative instrument adjustment, net of tax Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax TOTAL COMPREHENSIVE (LOSS) INCOME, NET OF TAX Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Net income attributable to noncontrolling interests Less: Other comprehensive income attributable to noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Total comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest TOTAL COMPREHENSIVE (LOSS) INCOME, NET OF TAX Comprehensive Income (Loss), Net of Tax, Attributable to Parent Balance Sheet Condensed Balance Sheet [Table Text Block] Income Statement Condensed Income Statement [Table Text Block] Cash Flow Condensed Cash Flow Statement [Table Text Block] Unamortized debt discount Period in which loan considered past due Past Due Period Past Due Period Period in which loan suspend accrual of interest Past Due Loan Suspend Accrual of Interest Period Past Due Loan Suspend Accrual of Interest Period Period in which loan considered default loan Loan Payments Delinquency Period Beyond which Loan is Considered Defaulted Loan Payments Delinquency Period Beyond which Loan is Considered Defaulted Notes receivable estimated average remaining default rates Notes Receivable, Estimated Average Default Rates Notes Receivable, Estimated Average Default Rates Estimated default rate increases that would have resulted an increase in allowance for credit losses Result of Increase in Estimated Default Rate The projected increased default rate to apply to the allowance for credit losses. Financing receivable, allowance for credit losses, that would have been increased Financing Receivable, Allowance For Credit Losses, That Would Have Been Increased Financing Receivable, Allowance For Credit Losses, That Would Have Been Increased Weighted average FICO score within originated loan pool Weighted average FICO score within originated loan pool Weighted average FICO score within originated loan pool Average estimated rate of default for all outstanding loans Average Estimated Rate Of Default For All Outstanding Loans Average estimated rate of default for all outstanding loans. Equivalent shares of Marriott Vacations Worldwide common stock issued in exchange for ILG outstanding shares (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Marriott Vacations Worldwide common stock price as of Acquisition Date (in dollars per share) Fair value of Marriott Vacations Worldwide common stock issued in exchange for ILG outstanding shares Business Combination Consideration Transferred Equity Interests Issued and Issuable, Common Stock Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Common Stock Cash consideration to ILG shareholders, net of cash acquired of $154 million Payments to Acquire Businesses, Net of Cash Acquired Fair value of ILG equity-based awards attributed to pre-combination service Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Equity Awards Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Equity Awards Total consideration transferred, net of cash acquired Business Combination, Consideration Transferred Noncontrolling interests Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Total shareholder equity Cash acquired from acquisition Cash Acquired from Acquisition Long Term Debt Maturities Repayments Of Principal [Table] Long Term Debt Maturities Repayments Of Principal [Table] Long Term Debt Maturities Repayments Of Principal [Table] Capital Leases Capital Leases [Member] Capital Leases [Member] Long Term Debt Maturities Repayments Of Principal [Line Items] Long Term Debt Maturities Repayments Of Principal [Line Items] Long Term Debt Maturities Repayments Of Principal [Line Items] Total principal payments Contract with customer, performance obligation, decrease in revenue Contract with Customer, Performance Obligation Satisfied in Previous Period Number of days for payments to commence under financing contracts after closing Number Of Days For Payments To Commence Under Financing Contracts After Closing Number of days for payments to commence under financing contracts after closing Vacation ownership products, sales incentives, period Vacation Ownership Products, Sales Incentives, Period Vacation Ownership Products, Sales Incentives, Period Vacation ownership product, financing term Vacation Ownership Product, Financing Term Vacation Ownership Product, Financing Term Rental expiration period Vacation Package Expiration Period Vacation package expiration period Contract with customer, contract assets Contract with Customer, Asset, Gross Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Contractual interest expense Interest Expense, Debt, Excluding Amortization Amortization of debt discount Amortization of Debt Discount (Premium) Amortization of debt issuance costs Interest Expense, Debt Interest Expense, Debt SHAREHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Number of hotels acquired Number of Businesses Acquired Initial term of most leases (up to) Lessee, Operating Lease, Term of Contract Renewal term options Lessee, Operating Lease, Renewal Term Business combinations, pro forma, acquisition-related costs Business Combinations, Pro Forma, Acquisition-related Costs Costs incurred to effect a business combination, integration costs, severance and other employee-related costs Payments to acquire real estate Payments to Acquire Real Estate Purchase of vacation ownership units for future transfer to inventory Noncash transaction, value of consideration Other Significant Noncash Transaction, Value of Consideration Given CONTINGENCIES AND COMMITMENTS Commitments and Contingencies Disclosure [Text Block] Depreciation Depreciation Debt Balances, Net of Unamortized Debt Issuance Costs Schedule of Debt [Table Text Block] Convertible Debt Convertible Debt [Table Text Block] Shares for basic (loss) earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Employee stock options and SARs (in shares) Incremental Common Shares Attributable To Stock Option And Stock Appreciation Right Plans Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements for stock options and Stock Appreciation Rights using the treasury stock method. Restricted stock units (in shares) Incremental Common Shares Attributable to Restricted Stock Units Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements for Restricted Stock Units using the treasury stock method. Shares for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted BUSINESS SEGMENTS Segment Reporting Disclosure [Text Block]