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Trading days (whether or not consecutively) Debt Instrument, Convertible, Threshold Trading Days 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] Class A and Class B Common Stock Common Stock [Member] Estimated Fair Value Debt Securities, Available-for-Sale Expected volatility (in percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Interest expense Interest Expense, Debt, Excluding Amortization Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Schedule of Convertible Notes Convertible Debt [Table Text Block] Total liabilities and stockholders' deficit Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Restructuring and other charges, net Restructuring Charges Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Other (expense) income, net Other expense (income), net Other Nonoperating Income (Expense) Name Awards Close in Time to MNPI Disclosures, Individual Name Purchase of short- and long-term 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] RSUs forfeited/cancelled (in shares) PSUs forfeited/cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Settlement of convertible senior notes Stock Issued During Period, Value, Conversion of Convertible Securities Adjustment to Compensation: Adjustment to Compensation [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Axis] 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 on long-term debt Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Repurchase of aggregate principal amount Extinguishment of Debt, Amount Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Assets, Fair Value Disclosure Name Measure Name Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other non-cash adjustments Other Noncash Income (Expense) Debt Instrument Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Name Trading Arrangement, Individual Name Unrecognized equity-based compensation Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Advertising Advertising Advertising Expense Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Niraj Shah Adopted May 2026 Plan [Member] Niraj Shah Adopted May 2026 Plan Current assets Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One RSUs vested (in dollars per share) PSUs vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Sale and maturities of short- and long-term investments Proceeds from Sale, Maturity and Collection of Short-Term Investments Provision for income taxes, net Income Tax Expense (Benefit) Cost of goods sold Cost of Product and Service Sold Customer service and merchant fees Customer Service And Merchant Fees Represents information pertaining to expenses related to customer service and merchant fees incurred during the period. Award Timing Method Award Timing Method [Text Block] Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Cash, Cash Equivalents and Restricted Cash, Investments and Fair Value Measurements Cash and Cash Equivalents, Investments And Fair Value Disclosure [Text Block] Disclosure of marketable securities and the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. Net (loss) income Net loss Net income (loss) Numerator for basic and diluted (loss) earnings per share - net (loss) income 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] Segment Reconciling Items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Interest income Investment Income, Interest 2020 Repurchase Program and 2021 Repurchase Program 2020 Repurchase Program and 2021 Repurchase Program [Member] 2020 Repurchase Program and 2021 Repurchase Program Trading days (consecutive) Debt Instrument, Convertible, Threshold Consecutive Trading Days Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]