Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Shares used in computing earnings (loss) per share (000's): Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Proceeds from exercise of equity instruments and employee stock purchase plans (in shares) Equity Instruments And Employee Stock Purchase Plan, Shares, Exercises In Period Equity Instruments And Employee Stock Purchase Plan, Shares, Exercises In Period Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Expedia Group (“EG”) Advertising Expedia Group (“EG”) Advertising [Member] Expedia Group (“EG”) Advertising Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Common stock Common Stock, Value, Issued Schedule of Long Term Debt Outstanding Schedule of Long-Term Debt Instruments [Table Text Block] Reserve for legal contingencies Loss Contingency Accrual Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Sales and maturities of investments Proceeds from Sale, Maturity and Collection of Investments Derivative Instrument [Axis] Derivative Instrument [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Average repurchase price per share (in dollars per share) Shares Acquired, Average Cost Per Share Expense for allowance for expected uncollectible amounts Accounts 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Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Total Amount (in millions) Payments of Ordinary Dividends Level 2 Fair Value, Inputs, Level 2 [Member] Other income (expense): Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Credit facility Line of Credit Facility, Maximum Borrowing Capacity Proceeds from exercise of equity instruments and employee stock purchase plans Equity Instruments And Employee Stock Purchase Plan, Value, Exercises In Period Equity Instruments And Employee Stock Purchase Plan, Value, Exercises In Period Total other comprehensive income Other comprehensive income (loss), net of taxes Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Seasonality Seasonality Policy [Policy Text 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Gains (Losses) Debt Instrument, Convertible, Conversion Gains (Losses) Long-term debt Long-Term Debt Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Senior unsecured notes principal amount Debt Instrument, Face Amount Earnings per share attributable to Expedia Group, Inc. available to common stockholders: Earnings Per Share, Basic [Abstract] Stockholders’ Equity Equity [Text Block] Costs and expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Deferred Revenue Other Deferred Revenue [Member] Other Deferred Revenue [Member] Other changes in ownership of non-controlling interests Noncontrolling Interest, Period Increase (Decrease) Treasury stock - Common stock and Class B, at cost; Shares 186,613 and 181,749 Treasury Stock, Common, Value Total liabilities measured at fair value on a recurring basis Liabilities, Fair Value Disclosure Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Class B Common Stock Class B common stock Common Class B [Member] Consolidation Items [Domain] Consolidation Items [Domain] Payments for exchange of cross-currency interest rate swaps Payments for Hedge, Investing Activities Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings per share attributable to Expedia Group, Inc. available to common stockholders: Earnings Per 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Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Income taxes payable Accrued Income Taxes, Current Company Selected Measure Name Company Selected Measure Name Foreign Credit Facility Foreign Credit Facility [Member] Foreign Credit Facility [Member] Schedule of Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Dilutive effect of: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Change in unrealized losses on available for sale securities, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Derivatives: Derivative [Abstract] Matters Relating to International Withholding Tax Matters Relating to International Withholding Tax [Member] Matters Relating to International Withholding Tax Commitment fee, percent Line of Credit Facility, Commitment Fee Percentage Credit Facility [Domain] Credit Facility [Domain] Operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Cross-currency interest rate swaps Cross Currency Interest Rate Contract [Member] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] IRS Internal Revenue Service (IRS) [Member] Derivatives Derivatives, Policy [Policy Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commercial paper Commercial Paper [Member] U.S. treasury securities US Treasury Securities [Member] Entities [Table] Entities [Table] Investments: Investments, Fair Value Disclosure [Abstract] Gross forward liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Cash, Restricted Cash and Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Currency translation adjustments, tax expense (benefit) OCI, Foreign Currency Transaction and Translation Gain (Loss), Arising During Period, Tax Award Timing Predetermined Award Timing Predetermined [Flag] Treasury stock - Common and Class B Treasury Stock, Common [Member] Letters of credit issued under the credit facility Letters of Credit Outstanding, Amount Accounts payable, merchant Increase Decrease In Accounts Payable Merchant Increase (decrease) in accounts payable, merchant, which primarily consists of amounts billed from suppliers subsequent to the customers use of services. Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Net proceeds from issuance senior unsecured notes Proceeds from Issuance of Unsecured Debt Income tax rate Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Cross Currency Interest Rate Contract, 2025 Swap Cross Currency Interest Rate Contract, 2025 Swap [Member] Cross Currency Interest Rate Contract, 2025 Swap Stock-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Deferred merchant bookings Deferred Merchant Bookings Liability, Current Deferred Merchant Bookings Liability, Current Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] 3.8% senior notes due 2028 Three Point Eight Percent Senior Notes Due On Two Zero Two Eight [Member] Three Point Eight Percent Senior Notes Due On Two Zero Two Eight [Member] Embedded derivative liability Embedded Derivative Financial Instruments Embedded Derivative Financial Instruments [Member] Depreciation of property and equipment, including internal-use software and website development Depreciation Antidilutive Securities [Axis] Antidilutive Securities [Axis] Scenario [Domain] Scenario [Domain] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Selling and marketing - direct Selling and marketing - direct Selling and Marketing Expense 4.625% senior notes due 2027 Four Point Six Two Five Percent Senior Notes Due Two Thousand Twenty Seven [Member] Four Point Six Two Five Percent Senior Notes Due Two Thousand Twenty Seven [Member] Senior notes issued price percentage Senior Notes Issued Price Percentage The senior notes were issued at a percentage of par (less than 100% of par results in a discount). Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Possible additional federal tax expense Income Tax Examination, Estimate of Possible Loss Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment Information Segment Reporting [Text Block] Credit facility borrowings outstanding Long-Term Line of Credit Minimum Minimum [Member] Payment of dividends to stockholders Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Investments Investments, Fair Value Disclosure Weighted average number of shares outstanding (000's): Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Restricted cash and cash equivalents Restricted Cash and Cash Equivalent Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Total stockholders’ equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Payment of dividends to stockholders (declared at $0.40 per share and $0.48 per share) Dividends, Common Stock Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fixed-to fixed cross currency interest rate swaps entered into Number of Derivative Instruments Number of Derivative Instruments Common stock, authorized shares (in shares) Common Stock, Shares Authorized Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Tax Years 2017 to 2018 Tax Years 2017 to 2018 [Member] Tax Years 2017 to 2018 Exercise Price Award Exercise Price Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Segment Reporting [Line Items] Segment Reporting [Line Items] Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Other income (expense), net, excluding realized gain/loss on revenue hedges Other Nonoperating Income (Expense), Adjusted Other Nonoperating Income (Expense), Adjusted Debt Debt Disclosure [Text Block] Accrued interest related to senior notes Interest Payable Scenario [Axis] Scenario [Axis] Payments related to long-term debt Repayments of Long-Term Debt Debt instrument, unamortized discount (premium) and debt issuance costs, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Foreign currency translation losses, before tax Cumulative Translation Adjustment for Net Investment Hedge, Before Tax Cumulative translation adjustment in other comprehensive income reflecting gains or losses on foreign currency derivatives those are designated as, and are effective as, hedges of a net investment in a foreign entity, before tax effect. Restructuring reserve Restructuring Reserve Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Foreign currency forward contracts Foreign Currency Contract, Asset, Fair Value Disclosure Change in fair value of the embedded derivative Embedded Derivative, Gain (Loss) on Embedded Derivative, Net Adoption Date Trading Arrangement Adoption Date Debt, interest rate Debt Instrument, Interest Rate, Stated Percentage Total Expedia Group, Inc. stockholders’ equity Equity, Attributable to Parent Total other income (expense), net Nonoperating Income (Expense) Restructuring Type [Axis] Restructuring Type [Axis] ASSETS Assets [Abstract] ITA tax report amount ITA Tax Report Amount ITA Tax Report Amount Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Net accumulated gain on our foreign currency cash flow hedges gain (loss) reclassified to earnings, net Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Insider Trading Policies and Procedures [Line Items] 5.0% senior notes due 2026 Five Point Zero Percent Senior Notes Due On Two Zero Two Six [Member] Five Point Zero Percent Senior Notes Due On Two Zero Two Six [Member] Other, net Proceeds from (Payment for) Other Financing Activity Accounts receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Cross Currency Interest Rate Contract, 2022 Swaps Cross Currency Interest Rate Contract, 2022 Swaps [Member] Cross Currency Interest Rate Contract, 2022 Swaps Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Deferred income taxes Deferred Income Tax Expense (Benefit) Repayment of debt Repayments of Debt Other Other Services [Member] Other Services [Member] Type of Restructuring [Domain] Type of Restructuring [Domain] Letter of Credit Letter of Credit [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Unallocated corporate and other expenses Unallocated Corporate and Other Income (Expense) Unallocated corporate and other expenses include certain shared expenses such as accounting, human resources, certain information and technology and legal costs. Outstanding stock awards excluded from calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key Additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Other, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Other Stockholders' Equity, Other Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report B2B B2B [Member] Business To Business [Member] Senior Unsecured Notes Due April 2036 Senior Unsecured Notes Due April 2036 [Member] Senior Unsecured Notes Due April 2036 Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] (Gain) loss on minority equity investments, net Gains (losses) on minority equity investments, net Gain (Loss) on Investments Investment, Name [Axis] Investment, Name [Axis] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Deferred income taxes Deferred Income Tax Assets, Net Intersegment revenue Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Debt instrument, interest rate Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] Segment Adjusted EBITDA Adjusted Earnings Before Income Tax Depreciation Amortization Adjusted earnings before income tax, depreciation, and amortization, which is the primary operating metric for which our CODM manages our business. All Individuals All Individuals [Member] Proceeds from exchange of cross-currency interest rate swaps Proceeds from Hedge, Investing Activities Fair value of senior notes Debt Instrument, Fair Value Disclosure Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] TOTAL ASSETS Assets Accounts Receivable and Allowances Accounts Receivable [Policy Text Block] Convertible Debt Convertible Debt [Member] Reportable Segments Operating Segments [Member] Global Business Travel Group Global Business Travel Group [Member] Global Business Travel Group Interest expense Interest Expense, Nonoperating Carrying value of cost method investments Equity Securities without Readily Determinable Fair Value, Amount Prepaid expenses and other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Deferred merchant bookings Increase Decrease In Deferred Merchant Bookings Increase (decrease) in deferred merchant bookings, which consists of amounts received from travelers who have not yet traveled. Stock-based compensation Share-Based Payment Arrangement, Expense Measurement Basis [Axis] Measurement Basis [Axis] Other long-term liabilities Other Liabilities, Noncurrent Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue recognized during period Contract with Customer, Liability, Revenue Recognized Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained earnings (deficit) Retained Earnings [Member] Operating lease liabilities Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Money market funds Money Market Funds [Member] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common stock, beginning balance (in shares) Common stock, ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Corporate debt securities Corporate Debt Securities [Member] Diluted (in dollars per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Withholding taxes for stock options Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Accounts payable, merchant Accounts Payable Merchant Consists primarily of amounts billed from suppliers subsequent to the customers use of services. 2.95% senior notes due 2031 Two Point Nine Five Percentage Senior Notes Due 2031 [Member] Two Point Nine Five Percentage Senior Notes Due 2031 Net unrealized gains (losses) on cash flow hedges, tax expense (benefit) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Liabilities Liabilities, Fair Value Disclosure [Abstract] Unrealized gains (losses) Unrealized Gain (Loss) on Investments Despegar.com Corp. Despegar.com Corp. [Member] Despegar.com Corp. [Member] Amortization of intangible assets Intangible Asset, Finite-Lived, Amortization Expense Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Net accumulated gain on our foreign currency cash flow hedges before tax effect Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Revenue Revenue from Contract with Customer, Excluding Assessed Tax Debt securities, available-for-sale, term Debt Securities, Available-for-Sale, Term Financial Instruments [Domain] Financial Instruments [Domain] Proceeds from exercise of equity awards and employee stock purchase plan Proceeds From Exercise Of Equity Awards And Employee Stock Purchase Plan Proceeds From Exercise Of Equity Awards And Employee Stock Purchase Plan Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Less: Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Fair value of derivative, liability Derivatives Foreign Currency Contracts, Liability, Fair Value Disclosure Legal reserves, occupancy tax and other Legal reserves, occupancy tax and other Legal Reserves Occupancy Tax And Other Legal reserves, occupancy tax and other consists of changes in reserves for court decisions and the potential and final settlement of issues related to hotel occupancy taxes, expenses recognized related to monies paid in advance of occupancy and other tax proceedings as well as certain other legal reserves. Segment Reporting [Table] Segment Reporting [Table] 5.4% senior notes due 2035 Five Point Four Percentage Senior Notes Due 2035 [Member] Five Point Four Percentage Senior Notes Due 2035 Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Gain on derivative recognized in interest expense Derivative, Gain (Loss) on Derivative, Net Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating Income (Loss) Schedule of Dividends Declared Dividends Declared [Table Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount 5.5% senior notes due 2036 Five Point Five Percentage Senior Notes Due 2036 [Member] Five Point Five Percentage Senior Notes Due 2036 Restructuring and related cost, expected cost Restructuring and Related Cost, Expected Cost Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends declared per common share (in dollars per share) Dividends Per Share (in shares) Common Stock, Dividends, Per Share, Declared Treasury stock activity related to vesting of equity instruments (in shares) Treasury Stock Activity Related To Vesting Of Equity Instruments Shares Treasury stock activity related to vesting of equity instruments, shares Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Income Tax Examination [Table] Income Tax, Examination [Table] Equity investments Equity Securities [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Amortization of debt discount Amortization of Debt Discount (Premium) Entity Information [Line Items] Entity Information [Line Items] Treasury stock (in shares) Treasury stock, beginning balance (in shares) Treasury stock, ending balance (in shares) Treasury Stock, Common, Shares Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Deferred merchant bookings recognized during period Deferred Merchant Booking Liability, Decrease Due to Recognition During Period Deferred Merchant Booking Liability, Decrease Due to Recognition During Period Cost of revenue (exclusive of depreciation and amortization shown separately below) Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Term deposits and certificates of deposit Bank Time Deposits And Certificates Of Deposit [Member] Bank Time Deposits And Certificates Of Deposit Income tax payments, net Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Net loss attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Debt instrument, unamortized discount Debt Instrument, Unamortized Discount Termination Date Trading Arrangement Termination Date Foreign exchange (gain) loss on cash, restricted cash and short-term investments, net Foreign Exchange Gain Loss On Cash Cash Equivalents And Short Term Investments Net Foreign Exchange Gain Loss On Cash Cash Equivalents And Short Term Investments Net Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Tax payable/receivable, net Increase (Decrease) in Income Taxes Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Term Benchmark Loans Index Rate Term Benchmark Loans Index Rate [Member] Term Benchmark Loans Index Rate Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Accrued expenses and other current liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Debt instrument redemption price percentage Debt Instrument, Redemption Price, Percentage Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Debt instrument, conversion premium Payments Related To Conversion Value In Excess Of The Principal Amount Of Convertible Notes Payments Related To Conversion Value In Excess Of The Principal Amount Of Convertible Notes Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Currency translation adjustments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number 2.5% senior notes due 2022 Two Point Five Percent Senior Notes Due On Two Thousand Twenty Two [Member] Two Point Five Percent Senior Notes Due On Two Thousand Twenty Two [Member] Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] B2C and B2B B2C and B2B [Member] B2C and B2B LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount U.S. agency securities US Government Agencies Debt Securities [Member] Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Common stock repurchases (in shares) Treasury Stock, Shares, Acquired PEO Name PEO Name Selling and marketing - indirect Indirect Selling And Marketing Expenses Indirect Selling And Marketing Expenses Other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Number of lawsuits currently active Loss Contingency Number Of Lawsuits Currently Active This element represents the number of lawsuits in which the reporting entity was involved and which are currently active. Common stock repurchases Treasury stock, value, acquired, cost method Treasury Stock, Value, Acquired, Cost Method Cumulative unrealized downward adjustments Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount Cash, cash equivalents and restricted cash and cash equivalents at beginning of period Cash, cash equivalents and restricted cash and cash equivalents at end of period Total cash, cash equivalents and restricted cash and cash equivalents in the consolidated statements of cash flows Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Technology and content Technology and Content Expense Technology and content expense includes product development and content expense, as well as information technology costs to support infrastructure, back-office applications and overall monitoring and security of networks, and is principally comprised of personnel and overhead, depreciation and amortization of technology assets including hardware, and purchased and internally developed software, and other costs including cloud expense, licensing and maintenance expense and stock-based compensation. Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Treasury stock activity related to vesting of equity instruments Treasury Stock Activity Related To Vesting Of Equity Instruments Treasury stock activity related to vesting of equity instruments Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Restricted cash and cash equivalents Restricted Cash and Cash Equivalent, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Amortization of stock-based compensation Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Tax Period [Axis] Tax Period [Axis] Tax Years 2011 to 2013 Tax Years 2011 to 2013 [Member] Tax Years 2011 to 2013 Customer [Domain] Customer [Domain] Investment, Name [Domain] Investment, Name [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Purchases of treasury stock Payments for Repurchase of Common Stock Deferred revenue Contract with Customer, Liability, Current Number of reportable segments disclosed by definition Number Of Reportable Segments Disclosed By Definition Flag Number Of Reportable Segments Disclosed By Definition Flag Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt, excluding current maturities Long-Term Debt, Excluding Current Maturities trivago Advertising Trivago Advertising [Member] Trivago Advertising Cost of revenue Cost of Revenue Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net of allowance of $95 and $74 Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Employee Severance Employee Severance [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Deferred Loyalty Rewards Deferred Loyalty Rewards [Member] Deferred Loyalty Rewards [Member] Merchant Merchant Customers [Member] Merchant Customers [Member] Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] 3.25% senior notes due 2030 Three Point Twenty Five Percent Senior Notes Due Two Thousand Thirty [Member] Three Point Twenty Five Percent Senior Notes Due Two Thousand Thirty [Member] Schedule of Convertible Debt Convertible Debt [Table Text Block] TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Litigation relating to occupancy tax Litigation Relating to Occupancy Tax [Member] Litigation Relating to Occupancy Tax [Member] Net gains (losses) from foreign currency forward contracts Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Proceeds from issuance of long-term debt, net of issuance costs Proceeds from Issuance of Senior Long-Term Debt Restructuring and related reorganization charges Restructuring Charges Income Tax Authority [Domain] Income Tax Jurisdiction [Domain] Tabular List, Table Tabular List [Table Text Block] Loss contingency, loss in period Loss Contingency Accrual, Loss (Reversal of Loss) Other, net Other Nonoperating Income (Expense) Air Air [Member] Air [Member] Convertible notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Income taxes receivable Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders’ equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Purchases of investments Payments to Acquire Investments Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative General and Administrative Expense Price per share to be acquired (in dollars per share) Sale of Stock, Price Per Share Adjustment to Compensation: Adjustment to Compensation [Axis] Accounts payable, other, accrued expenses and other liabilities Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Foreign currency forward contracts Foreign Exchange Forward [Member] Credit Facility [Axis] Credit Facility [Axis] Restructuring and Related Reorganization Charges Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets measured at fair value on a recurring basis Assets, Fair Value Disclosure Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] Advertising, media and other Advertising, Media, And Other Customers [Member] Advertising, Media, And Other Customers [Member] Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net gains from cash flow hedges before tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Realized (gain) loss on foreign currency forwards, net Gain (Loss) on Sale of Derivatives Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Comprehensive income attributable to Expedia Group, Inc. Comprehensive Income (Loss), Net of Tax, Attributable To Common Stockholders' Comprehensive Income (Loss), Net of Tax, Attributable To Common Stockholders' Sales Channel, Through Intermediary Sales Channel, Through Intermediary [Member] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Tax Period [Domain] Tax Period [Domain] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Restructuring and related reorganization charges, excluding stock-based compensation Restructuring And Related Reorganization Charges Restructuring And Related Reorganization Charges Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Current assets: Assets, Current [Abstract] Embedded derivative liability Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Provision for income taxes Income Tax Expense (Benefit) Loss contingency accrual, payments Loss Contingency Accrual, Payments Foreign currency translation losses, net of tax Cumulative Translation Adjustment for Net Investment Hedges, Net of Tax Cumulative Translation Adjustment for Net Investment Hedges, Net of Tax Prepaid merchant bookings Prepaid Merchant Bookings Asset, Current Prepaid Merchant Bookings Asset, Current Net income (loss) Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Derivative maturity Derivative, Remaining Maturity Deferred Merchant Bookings Deferred Merchant Bookings [Member] Deferred Merchant Bookings [Member] Net increase in cash, cash equivalents and restricted cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Derivatives: Offsetting Derivative Liabilities [Abstract] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Realized gains (losses) on revenue Realized Gain (Loss) On Revenue Hedges Realized Gain (Loss) On Revenue Hedges Net income attributable to Expedia Group, Inc. Net income attributable to Expedia Group, Inc. Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Lodging Lodging [Member] Lodging [Member] Restatement Determination Date: Restatement Determination Date [Axis] Agency Agency Customers [Member] Agency Customers [Member] Interest income Investment Income, Interest Gross forward asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Share-based Payment Arrangement Share-Based Payment Arrangement [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]