Document And Entity Information Abstract. Document And Entity Information [Abstract] Statement [Table] Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Series A Common Class B [Member] Series B Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Statement of Financial Position [Abstract] Assets [Abstract] Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Receivables, Net, Current Trade and other receivables, net Marketable Securities, Current Marketable securities Other Assets, Current Other current assets Assets, Current Total current assets Available-for-sale Securities, Noncurrent Investments in available-for-sale securities Available-for-sale securities Property, Plant and Equipment, Gross Property and equipment, at cost Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation Property, Plant and Equipment, Net Property and equipment, net No Definition Available. Intangible assets not subject to amortization: Goodwill Indefinite-Lived Trademarks Trademarks Represents information pertaining to indefinite lived intangible assets including goodwill. Indefinite Lived Intangible Assets Total Intangible assets not subject to amortization Finite-Lived Intangible Assets, Net Intangible assets subject to amortization, net Other Assets, Noncurrent Other assets, at cost, net of accumulated amortization Assets Total assets Total assets Liabilities and Equity [Abstract] Liabilities, Current [Abstract] Current liabilities: Deferred Merchant and other payables Accrued Liabilities, Current Accrued liabilities Long-term Debt, Current Maturities Less debt classified as current Deferred Revenue Deferred revenue Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Total long-term debt Deferred Tax Liabilities, Net, Noncurrent Deferred income tax liabilities Other Liabilities, Noncurrent Other liabilities Liabilities Total liabilities Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Equity: Preferred Stock, Value, Issued Preferred Stock value Common Stock, Value, Issued Common stock value Additional Paid in Capital Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive earnings, net of taxes Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Total stockholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests in equity of combined companies Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance at end of the period Balance at beginning of the period Total equity Commitments and Contingencies.. Commitments and contingencies Liabilities and Equity Total liabilities and equity Allowance for Doubtful Accounts Receivable, Current Trade and other receivables, net of allowance for doubtful accounts Stockholders' Equity Attributable to Parent [Abstract] Equity: Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Common Stock, Par or Stated Value Per Share Common stock, par value per share Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Income Statement [Abstract] Service Revenue, Net Other Revenue, Net Revenue, Net Total revenues Total revenue, net Costs and Expenses [Abstract] Operating costs and expenses: Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expenses and Depreciation and Amortization. Operating Costs And Expenses Excluding Depreciation And Amortization Operating expense, including stock-based compensation (note 2) Selling, General and Administrative Expense. Selling, general and administrative, including stock-based compensation Depreciation, Depletion and Amortization, Nonproduction Depreciation And amortization Depreciation and amortization Costs and Expenses Total operating costs and expenses Operating Income (Loss) Operating income (loss) Nonoperating Income (Expense) [Abstract] Other income (expense): Interest Expense Interest expense Realized and Unrealized Gain (Loss) on Securities Realized and unrealized gains (losses) on financial instruments, net Other Nonoperating Income (Expense) Other, net Nonoperating Income (Expense) Total other income (expense) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Earnings (loss) before income taxes Total Income Tax Expense (Benefit) Income tax (expense) benefit Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net earnings (loss) Net earnings (loss) Net Income (Loss) Attributable to Noncontrolling Interest Less net earnings (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Parent Net earnings (loss) attributable to Liberty TripAdvisor Holdings, Inc. shareholders Earnings Per Share, Basic Earnings Per Share, Diluted Statement of Comprehensive Income [Abstract] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Other comprehensive earnings (loss), net of taxes: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Net of Tax Other comprehensive earnings (loss) Other comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less comprehensive earnings (loss) attributable to the noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive earnings (loss) attributable to Liberty TripAdvisor Holdings, Inc. shareholders Statement of Cash Flows [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net earnings (loss) to net cash provided by operating activities Share-based Compensation Stock-based compensation Deferred Income Tax Expense (Benefit) Deferred income tax expense (benefit) Other Noncash Charges Credits Net Other noncash charges (credits), net Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities Increase (Decrease) in Operating Assets Current and other assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Payables and other liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided (used) by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Payments to Acquire Productive Assets Capital expended for property and equipment Payments to Acquire Marketable Securities Purchases of short term investments and other marketable securities Proceeds from Sale and Maturity of Marketable Securities Sales and maturities of short term investments and other marketable securities Net Cash Provided by (Used in) Investing Activities Net cash provided (used) by investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Proceeds from Issuance of Debt Repayments of Long-term Debt Repayments of debt Repayments of long term debt Payments Related to Tax Withholding for Share-based Compensation Payment of withholding taxes on net share settlements of equity awards Sale of Stock, Consideration Received Per Transaction Shares issued by subsidiary The cash outflow to reacquire common stock by a subsidiary during the period. Payments For Repurchase Of Common Stock By Subsidiary Shares repurchased by subsidiary Net Cash Provided by (Used in) Financing Activities Net cash provided (used) by financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of foreign currency exchange rates on cash Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Aoci Including Portion Attributable To Noncontrolling Interest [Member] Accumulated Other Comprehensive Income (Loss) Retained Earnings [Member] Retained Earnings Noncontrolling Interest [Member] Noncontrolling Interest Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock compensation Adjustments Related to Tax Withholding for Share-based Compensation Withholding taxes on net share settlements of stock based compensation Noncontrolling Interest, Increase from Subsidiary Equity Issuance Shares issued by subsidiary Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Repurchase of Shares by Subsidiary Shares repurchased by subsidiary Basis of Presentation Basis of Presentation. Basis of Presentation Stock Based Compensation Stock Based Compensation. Stock Based Compensation Earnings (Loss) Per Common Share (EPS) Earnings per Share text block Earnings (Loss) Per Common Share (EPS) Assets and Liabilities Measured at Fair Value Assets and Liabilities Measured at Fair Value. Assets and Liabilities Measured at Fair Value Debt Debt. Debt Commitments and Contingencies Commitments and Contingencies. Commitments and Contingencies Segment Information Segment Information. Segment Information Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Schedule of stock-based compensation activity Amounts of stock-based compensation Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Basic and Diluted Weighted Average Shares Assets and liabilities measured at fair value.. Schedule of assets and liabilities measured at fair value Schedule of outstanding debt Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Value of shares pledged as collateral Schedule of other information Reconciliation of segment Adjusted OIBDA to earnings (loss) before income taxes Related Party [Axis] Related Party [Domain] Related Party [Domain] Represents information pertaining to Liberty Interactive Corporation, a related party and parent company prior to spin-off. Liberty Interactive Corporation [Member] Liberty Related Party Transaction, Amounts of Transaction Excess Tax Benefit from Share-based Compensation, Operating Activities Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Restricted Stock Units R S U [Member] Restricted Stock Units (RSUs) Employee Stock Option [Member] Stock Options Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Liberty Incentive Plans. Liberty Incentive Plans [Member] Liberty Incentive Plans Represents information pertaining to the 2011 Incentive Plan. Incentive Plan2011 [Member] 2011 Plan Represents information related to the 2014 Incentive Plan. Incentive Plan2014 [Member] 2014 Plan Stock-Based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend rate Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options outstanding Options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Cancelled or expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] WAEP Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, options outstanding (in dollars per share) Weighted average exercise price, options outstanding (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price, options granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, options exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted average exercise price, options forfeited/cancelled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted average exercise price, options exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual term outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted average remaining contractual term exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Additional disclosures Allocated Share-based Compensation Expense Stock-based compensation Stock-based compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unvested value not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted average period the unrecognized compensation cost will be recognized Common Stock, Capital Shares Reserved for Future Issuance Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized compensation cost, unvested options (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, options (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Stock options exercised intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period RSUs granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, granted during period RSUs (in dollars per share) Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation cost, unvested RSUs Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Operating Expense [Member] Operating expense Selling General And Administrative Expenses [Member] Selling, general and administrative Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Weighted Average Number of Shares Outstanding, Basic Basic WASO (In Shares) Weighted Average Number of Shares Outstanding, Diluted Diluted WASO (In Shares) Fair Value Measurements, Recurring and Nonrecurring [Table] Legal Entity [Axis] Entity [Domain] Entity [Domain] Represents information pertaining to TripAdvisor, a subsidiary of the entity. Tripadvisor Inc [Member] Trip Advisor Measurement Frequency [Axis] Fair Value Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Measurements Recurring [Member] Recurring Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Level 1 Fair Value Inputs Level2 [Member] Level 2 Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents Derivative Asset Forward Contract Indexed to Issuer's Equity, Indexed Shares Forward Contract Shares indexed Derivative, Floor Price Derivative, Cap Price Debt Instrument, Face Amount Total borrowings A table or schedule providing information pertaining to short-term and long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. Schedule Of Debt Instruments Table Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Information related to the Trip Advisor 2015 Credit Facility [Member] Tripadvisor2015 Credit Facility [Member] Credit Facilities Information related to the TripAdvisor 2016 Credit Facility Tripadvisor2016 Credit Facility [Member] 2016 Credit Facility Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Margin loan Margin Loan [Member] Margin loan member Margin loan amendment No. 1 Margin Loan Amendment1 [Member] Margin Loan Amendment 1 Foreign Line Of Credit [Member] Chinese credit facilities Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate L I B O R [Member] LIBOR The alternate base rate. Alternate Base Rate [Member] ABR Represents the People's Bank of China base rate as the debt instrument reference rate. Peoples Bank Of China Base Rate [Member] People's Bank of China base rate Represents information pertaining to TripCo. Tripco [Member] TripCo Represents information pertaining to the Chinese subsidiaries of TripAdvisor, a subsidiary of the entity. Tripadvisor Chinese Subsidiaries [Member] TripAdvisor's Chinese subsidiaries Debt Instrument [Line Items] Debt Financing Long-term Debt, Gross Total debt Long-term Debt Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Debt Instrument, Term Debt Instrument Term Derivative, Term of Contract Derivative contract term Debt Instrument, Description of Variable Rate Basis Variable rate basis Debt Instrument, Basis Spread on Variable Rate Margin Percentage points added to the reference rate to compute the variable rate on the debt instrument when amounts are overdue. Debt Instrument Basis Spread On Variable Rate When Delinquent Margin when payments are overdue Line of Credit Facility, Commitment Fee Percentage Commitment fee Debt Instrument, Interest Rate, Effective Percentage Interest rate The cash outflow for the payment of paid-in-kind interest Payment of paid-in-kind interest Long-term Line of Credit Line of Credit Number of debt instruments Debt instrument, number of instruments The total amount of the loan at maturity including accreted amounts. Debt Instrument Include Accreted Amounts Accreted loan total at maturity The period of time of the initial redemption period. Debt Instrument Initial Redemption Period Term Initial redemption period Shares pledged as collateral under loan Shares Pledged As Collateral Under Loan Shares pledged as collateral under loan Financial Instruments, Owned and Pledged as Collateral, at Fair Value Share value Paid-in-Kind Interest The outstanding balance of the margin loans if the closing price per share of TripAdvisor common stock falls below the initial margin call threshold. Outstanding Margin Loan Balance If Initial Margin Call Threshold is Met The maximum amount of funding available to TripCo, though a promissory note with Liberty Interactive LLC, if call thresholds on the margin loan agreements are triggered. Maximum Value of Promissory Note if Margin Call Thresholds Are Triggered Percentage of interest that is based on the reference rate to compute the variable rate on the debt instrument. Debt Instrument Applicable Percentage Base Rate Debt instrument applicable percentage base rate Letters of Credit Outstanding, Amount Outstanding letters of credit Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Segments Adjusted OIBDA is defined by the Company as revenue less operating expenses and selling, general and administrative expenses (excluding stock-based compensation). This measure of performance excludes depreciation and amortization, stock-based compensation, separately reported litigation settlements and restructurings and impairment charges that are included in the measurement of operating income pursuant to GAAP. Adjusted Oibda Adjusted OIBDA Consolidated segment Adjusted OIBDA Property, Plant and Equipment, Additions Capital expenditures Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Reconciliation Preferred Stock [Member] Preferred Stock Common Class C [Member] Series C Additional Paid In Capital [Member] Additional Paid-in Capital Financial Instrument [Axis] Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Financial Instruments [Domain] Forward Contracts [Member] Forward Contracts Information related to the variable postpaid forward Variable Postpaid Forward [Member] Variable postpaid forward Information related to the Chinese credit facility with Bank of America. Foreign Line Of Credit Bank Of America [Member] Chinese Credit Facility-BOA Information related to the Chinese credit facility with J.P. Morgan Chase Bank. Foreign Line Of Credit Jp Morgan Chase Bank [Member] Chinese Credit Facility-JPM Revolving Credit Facility [Member] Revolving Credit Facility Letter Of Credit [Member] Letter of Credit Information related to same-day notice borrowings. Same Day Notice Borrowings [Member] Same-day notice borrowings Eurodollar [Member] Euro Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Debt Instrument, Redemption, Period [Axis] Debt Instrument Redemption Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument Redemption Period One [Member] Redemption period one Debt Instrument Redemption Period Two [Member] Redemption period two Segments [Axis] Segment [Domain] Segments [Domain] Corporate And Other [Member] Corporate and Other