Equity [Abstract] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Equity Components Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Treasury Stock Treasury Stock [Member] 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) Treasury Stock, 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 Number of Shares of Common Stock Repurchased (in shares) Treasury Stock, Shares, Acquired Cost of Shares Repurchased Treasury Stock, Value, Acquired, Cost Method 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) Disclosure of Compensation Related Costs, Share-based Payments [Abstract] 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 Receivables [Abstract] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Products and Services Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Non-Securitized Vacation Ownership Notes Receivable Nonsecuritized Vacation Ownership Notes Receivable [Member] Nonsecuritized vacation ownership notes receivable Securitized Vacation Ownership Notes Receivable Securitized Vacation Ownership Notes Receivable [Member] Securitized vacation ownership notes receivable 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 Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Vacation ownership notes receivable — securitized Vacation ownership notes receivable — non-securitized Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Interest income Interest On Notes Receivable Interest On Notes Receivable Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] SHAREHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] 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] Segment Reporting [Abstract] BUSINESS SEGMENTS Segment Reporting Disclosure [Text Block] 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] 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] Net income Net Income (Loss) Attributable to Parent Shares for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Basic earnings per share (in usd per share) Earnings Per Share, 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 Diluted earnings per share (in usd per share) Earnings Per Share, Diluted Shares excluded from the calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Inventory Disclosure [Abstract] Inventory, Current [Table] Inventory, Current [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Estimated Future Foreclosures Foreclosed Collateral [Member] Foreclosed Collateral [Member] Inventory [Axis] Inventory [Axis] Inventory [Domain] Inventory [Domain] Inventory [Line Items] Inventory [Line Items] Finished goods Inventory, Real Estate, Timeshare Available-for-sale Work-in-progress Inventory, Work in Process, Gross Land and infrastructure Inventory, Land and Infrastructure Inventory, Land and Infrastructure 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. Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock, shares (in shares) Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Number of additional shares authorized to be repurchased (in shares) Stock Repurchase Program Number Of Additional Shares Authorized To Be Repurchased Stock Repurchase Program Number Of Additional Shares Authorized To Be Repurchased 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 Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Warehouse Credit Facility Warehouse Credit Facility [Member] Warehouse Credit Facility [Member] 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 June 30, 2018 Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Vacation Ownership Notes Receivable Securitizations Vacation Ownership Notes Receivable Securitizations [Member] Vacation Ownership Notes Receivable Securitizations [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Cash Inflows Cash Inflows [Abstract] Cash Inflows [Abstract] Net proceeds from vacation ownership notes receivable securitizations Proceeds from (Repayments of) Accounts Receivable Securitization Proceeds from vacation ownership notes receivable securitizations Proceeds from 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 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. Revenue from Contract with Customer [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] 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] 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] 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] ASSETS Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Accounts receivable, net Accounts Receivable, Net Vacation ownership notes receivable, net Financing Receivable, Net Inventory Property and equipment Property, Plant and Equipment, Net Other Other Assets TOTAL ASSETS Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Accounts payable Accounts Payable Accrued liabilities Accrued Liabilities Contract Liabilities Contract with Customer, Liability Payroll and benefits liability Employee-related Liabilities Deferred compensation liability Deferred Compensation Liability, Current and Noncurrent 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. Other Other Liabilities Deferred taxes Deferred Tax Liabilities, Net 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) TOTAL EQUITY Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND EQUITY Liabilities and Equity INVENTORY Inventory Disclosure [Text Block] 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 Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt Convertible Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Convertible Senior Notes Convertible Senior Notes [Member] Convertible Senior Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Principal amount Long-term Debt, Gross Unamortized debt discount Debt Instrument, Unamortized Discount Unamortized debt issuance costs Unamortized Debt Issuance Expense Long-term Debt Long-term Debt Carrying amount of equity component, net of issuance costs Debt Instrument, Convertible, Carrying Amount of Equity Component Commitments and Contingencies Disclosure [Abstract] CONTINGENCIES AND COMMITMENTS Commitments and Contingencies Disclosure [Text Block] REVENUE Revenue from Contract with Customer [Text Block] 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] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] 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] Statement [Line Items] Statement [Line Items] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate and other Corporate, Non-Segment [Member] Business Segments Segments [Axis] Segments [Domain] Segments [Domain] North America North America Segment [Member] North America Segment [Member] Asia Pacific Asia Pacific Segment [Member] Asia Pacific Segment [Member] Europe Europe Segment [Member] Europe Segment. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total Assets EARNINGS PER SHARE Earnings Per Share [Text Block] 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. 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 Composition of Inventory Inventory [Table Text Block] Inventory Table SHARE-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Income Statement [Abstract] Vacation ownership products Time Share [Member] Resort management and other services Resort Management And Other Services [Member] Resort Management And Other Services [Member] Rental Rental [Member] Rental [Member] Cost reimbursements Cost Reimbursements [Member] Cost Reimbursements [Member] REVENUES Revenues [Abstract] Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax 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 EXPENSES Costs and Expenses [Abstract] Expenses Cost of Goods and Services Sold Financing Financing Expense Not From Contract With Customer Financing expenses include costs in support of the financing, servicing and securitization processes. Marketing and sales Selling and Marketing Expense General and administrative General and Administrative Expense Litigation settlement Gain (Loss) Related to Litigation Settlement 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 TOTAL EXPENSES Costs and Expenses Losses and other expense, net Gains (Losses) And Other Income (Expense), Net Gains (Losses) And Other Income (Expense), Net Interest expense Interest Income (Expense), Nonoperating, Net Other Other Nonoperating Expense INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) NET INCOME EARNINGS PER SHARE Earnings per share - Basic (in usd per share) Earnings per share - Diluted (in usd per share) CASH DIVIDENDS DECLARED PER SHARE (in usd per share) Common Stock, Dividends, Per Share, Declared DEBT Debt Disclosure [Text Block] 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] Share-based compensation expense Allocated Share-based Compensation Expense 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 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 Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] 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 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] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Revolving Corporate Credit Facility Revolving Corporate Credit Facility [Member] Revolving 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] 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] 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] 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 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] 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] 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] 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 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 Number of plaintiffs in lawsuits Loss Contingency, Number of Plaintiffs New claims filed Loss Contingency, New Claims Filed, Number Number of plaintiffs, released claims Loss Contingency, Number of Plaintiffs, Released Claims Loss Contingency, Number of Plaintiffs, Released Claims 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 Estimated recovery from third party Loss Contingency, Estimated Recovery Loss Contingency, Estimated Recovery Our Business Nature of Operations [Policy Text Block] Nature of Operations Principles of Consolidation and Basis of Presentation Basis of Presentation and Principles of Consolidation [Policy Text Block] Basis of Presentation and Principles of Consolidation 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] Future Minimum Payments Receivable [Table] Future Minimum Payments Receivable [Table] Future Minimum Payments Receivable [Table] Range Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] 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 maturities Time Sharing Transactions, Maturities of Notes Receivable, Net Weighted average stated interest rate at June 30, 2018 Time-sharing Transactions, Stated Interest Rate for Notes Receivable Long Term Debt Maturities Repayments Of Principal [Table] Long Term Debt Maturities Repayments Of Principal [Table] Long Term Debt Maturities Repayments Of Principal [Table] Vacation Ownership Notes Receivable Securitizations Non Recourse Debt [Member] Non Recourse Debt Non-interest bearing note payable, net Notes Payable, Other Payables [Member] Capital Leases Capital Leases [Member] Capital Leases [Member] Non-Interest Bearing Note Payable Non-Interest Bearing Note Payable [Member] Non-Interest Bearing Note Payable [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] 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 June 30, 2017 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. 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] Assets Reconciliation of Assets from Segment to Consolidated [Table Text Block] Real estate inventory true up (less than) Real Estate Inventory True Up Changes in estimates within the relative sales value calculations accounted for as real estate inventory true-ups. 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 Purchase commitment Debt Disclosure [Table] Debt Disclosure [Table] Debt Disclosure [Table] Big Island Of Hawaii Big Island Of Hawaii [Member] Big Island Of Hawaii [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] 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] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Convertible Note Hedges Convertible Note Hedges [Member] Convertible Note Hedges [Member] Private Warrants Private Warrants [Member] Private Warrants [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] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Eurodollar Eurodollar [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] Non-Recourse Debt Debt Disclosure [Line Items] Debt Disclosure [Line Items] Debt Disclosure [Line Items] Cash paid for interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Values of vacation ownership notes receivable that were securitized during the period Values of Vacation Ownership Notes Receivable that Were Securitized During the Period Values of Vacation Ownership Notes Receivable that Were Securitized During the Period Decrease in restricted cash Increase (Decrease) in Restricted Cash Number of classes of notes issued in securitization Number of Classes of Notes Issued in Securitization Number of Classes of Notes Issued in Securitization Debt, stated interest rate Debt Instrument, Interest Rate, Stated Percentage Debt, weighted average interest rate Debt, Weighted Average Interest Rate 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 Principal amount Debt Instrument, Face Amount Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Debt instrument, convertible, conversion price (in usd per share) Debt Instrument, Convertible, Conversion Price Dividend per Share (in usd per share) Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Principal amount 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 Exercise price of warrants (in usd per share) Class of Warrant or Right, Exercise Price of 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 Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Line of credit Long-term Line of Credit Line of credit facility, commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Repayment of non-interest bearing note payable Repayments of Notes Payable Non-cash issuance of debt in connection with acquisition of vacation ownership units 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] Future Principal Payments, Net of Reserves, and Interest Rates of Vacation Ownership Notes Receivable Schedule of Financing Receivables, Minimum Payments [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. 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] VACATION OWNERSHIP NOTES RECEIVABLE Financing Receivables [Text Block] Interest expense to investors Interest Expense, Related Party Debt issuance cost amortization Amortization of Debt Issuance Costs Administrative expenses Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Retained Earnings Retained Earnings [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Retained earnings Cumulative Effect of New Accounting Principle in Period of Adoption 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] SARS not included in the calculation of diluted earnings per share because exercise prices exceeded market prices, exercise prices (in usd per share) Exercise Price Securities, Excluded From Computation Of Earnings Per Share Exercise Price, stock options and SARs not included in the calculation of diluted earnings per share because exercise prices exceeded average market prices for the applicable periods. Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Financing Receivables, 31 To 90 Days Past Due [Member] Financing Receivables, 31 To 90 Days Past Due [Member] Financing Receivables, 31 To 90 Days Past Due [Member] Financing Receivables, 91 To 150 Days Past Due [Member] Financing Receivables, 91 To 150 Days Past Due [Member] Financing Receivables, 91 To 150 Days Past Due [Member] Financing Receivables, Greater than 150 Days Past Due [Member] Financing Receivables, Greater than 150 Days Past Due [Member] Financing Receivables, Greater than 150 Days Past Due [Member] Total past due Financing Receivable, Recorded Investment, Past Due Current Financing Receivable, Recorded Investment, Current Total vacation ownership notes receivable Financing Receivable, Gross Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] 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] 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] Statement of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation 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: 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 provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] 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 Dispositions, net Proceeds from Sale of Other Property, Plant, and Equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings from securitization transactions Proceeds from Issuance of Secured Debt Repayment of debt related to securitization transactions Repayments of Secured Debt Borrowings from Revolving Corporate Credit Facility Proceeds from Lines of Credit Repayment of Revolving Corporate Credit Facility Repayments of Lines of Credit Debt issuance costs Payments of 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 Other, net Proceeds from (Payments for) Other Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities 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 (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 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 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 Other Debt Other Debt [Member] Other Debt Debt, gross Unamortized debt issuance costs Unamortized debt discount and issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Unamortized discount Capital leases Capital Lease Obligations Debt, net Effective percentage Debt Instrument, Interest Rate, Effective Percentage Business Combinations [Abstract] ACQUISITIONS AND DISPOSITIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] Notes Receivable Notes Receivable [Member] Other Receivables Other Receivables [Member] Other Receivables [Member] Marco Island Florida Florida FLORIDA Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Limit to repurchasing defaulted mortgage notes at the outstanding principal balance Percentage of Defaulted Mortgage Loans Repurchase The percentage of the initial mortgage balance of securitized mortgage notes receivable that we are limited in repurchasing upon default, based on the Timeshare note securitization transaction documents for each transaction. 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 Number of vacation ownership units acquired Number Of Vacation Ownership Units Acquired Number Of Vacation Ownership Units Acquired Other liabilities Cash surrender value of life insurance Cash Surrender Value of Life Insurance Restricted cash (including $144,816 and $32,321 from VIEs, respectively) Accounts receivable, net (including $6,039 and $5,639 from VIEs, respectively) Vacation ownership notes receivable, net (including $964,510 and $814,011 from VIEs, respectively) Other (including $25,688 and $13,708 from VIEs, respectively) Accrued liabilities (including $685 and $701 from VIEs, respectively) Debt, net (including $1,113,860 and $845,131 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; 36,981,204 and 36,861,843 shares issued, respectively Treasury stock — at cost; 10,408,996 and 10,400,547 shares, respectively Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Operations located outside the United States Outside United States [Member] Outside United States Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Number of business segments Number of Reportable Segments Number of properties Number of Properties Number of Properties Number of countries and territories in which company operates (location) Number of Countries in which Entity Operates Number of primary sources of revenues generated (line) Number of Sources of Revenues Number of Sources of Revenues 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 Senior Notes Senior Notes [Member] Total financial assets Instruments, Financial Assets Instruments, Financial Assets Debt, net Total financial liabilities Instruments, Financial Liabilities Instruments, Financial Liabilities VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] 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 Expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] Changes in Shareholders' Equity Schedule of Stockholders Equity [Table Text Block] Stock Repurchase Activity under Current Stock Repurchase Program Class of Treasury Stock [Table Text Block] Cash Dividend Declared Dividends Declared [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] ILG, Inc ILG, Inc [Member] ILG, Inc [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Implied equity value of cash and stock transaction Implied Equity Value Of Cash And Stock Transaction The implied equity value of the cash and stock transaction Business combination, share conversion ratio Business Acquisition, Equity Interests Issuable Per Share Owned By Acquiree Business Acquisition, Equity Interests Issuable Per Share Owned By Acquiree Business combination, share price (in usd per share) Business Acquisition, Share Price Purchase of vacation ownership units for future transfer to inventory Payments to acquire real estate Payments to Acquire Real Estate Noncash transaction, value of consideration Other Significant Noncash Transaction, Value of Consideration Given 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 Provision for income taxes Stockholders' Equity [Table] Stockholders' Equity [Table] Stockholders' Equity [Table] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] December 31, 2017 Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Derivative instrument adjustment Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Amounts related to share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options Repurchase of common stock Dividends Dividends Employee stock plan issuance Stock Issued During Period, Value, Employee Stock Purchase Plan June 30, 2018 Income Tax Disclosure [Abstract] 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 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 INCOME TAXES Income Tax Disclosure [Text Block] 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 Number of points based programs Number Of Points Based Programs Number Of Points Based Programs Schedule of New Accounting Pronouncement Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Debt Balances, Net of Unamortized Debt Issuance Costs Schedule of Debt [Table Text Block] Scheduled Future Principal Payments for Debt Schedule of Maturities of Long-term Debt [Table Text Block] Convertible Debt Convertible Debt [Table 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] ADOPTION IMPACT OF NEW REVENUE STANDARD Ancillary revenues Ancillary Revenues [Member] Ancillary Revenues Management fee revenues Management Service [Member] Other services revenues Service, Other [Member] 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 Statement of Comprehensive Income [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Derivative instrument adjustment, net of tax Total other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Revenues Losses and other expense, net 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 Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] FINANCIAL INSTRUMENTS Financial Instruments Disclosure [Text Block]