Product Commerce Product Commerce Segment [Member] Product Commerce Segment Statistical Measurement [Domain] Statistical Measurement [Domain] Award Timing Predetermined Award Timing Predetermined [Flag] Judicial ruling Judicial Ruling [Member] Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] Supplemental Financial Information Additional Financial Information Disclosure [Text Block] Restricted cash Restricted Cash, Fair Value Disclosure Restricted Cash, Fair Value Disclosure Recent Accounting Pronouncements Yet To Be Adopted New Accounting Pronouncements, Policy [Policy Text Block] Accounts payable Increase (Decrease) in Accounts Payable Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in usd per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Net Revenues Revenue from Contract with Customer [Text Block] Total other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Short-term borrowings Short-Term Debt Issuance of common stock upon settlement of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Money market trust Money Market Trust [Member] Money Market Trust Other assets Increase (Decrease) in Other Operating Assets Principles of Consolidation Consolidation, Policy [Policy Text Block] Equity-based compensation Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Other comprehensive loss: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Equity-based compensation Share-Based Payment Arrangement, Expense Common stock, shares authorized (in shares) Common Stock, Shares Authorized Current assets Assets, Current [Abstract] Financial assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Total liabilities and equity Liabilities and Equity Accumulated defined benefit plans adjustment attributable to parent Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Net income Temporary Equity, Net Income Liabilities and equity Liabilities and Equity [Abstract] Cover [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Maximum Maximum [Member] Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Net (loss) income Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Actuarial gain on defined severance benefits, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, After Tax and Reclassification Adjustment, Attributable to Parent And Noncontrolling Interest Other Comprehensive (Income) Loss, Defined Benefit Plan, After Tax and Reclassification Adjustment, Attributable to Parent And Noncontrolling Interest Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] (Loss) income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from short-term borrowings and long-term debt Proceeds from Issuance of Debt Statement of Stockholders' Equity [Abstract] Operating segments Operating Segments [Member] Schedule of Supplemental Disclosure of Cash-flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Comprehensive (loss) income attributable to Coupang stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Current portion of long-term operating lease obligations Operating Lease, Liability, Current Document fiscal period focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Award Type Award Type [Axis] Accumulated foreign currency adjustment attributable to parent Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Long-term debt Long-Term Debt Total assets Assets Trading Symbol Trading Symbol Entity Address, City or Town Entity Address, City or Town Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Total other segment items Segment Reporting, Other Segment Item, Amount Effect of exchange rate changes on cash and cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Reconciliations of segment profit or loss Segment, Reconciliation of Other Items from Segments to Consolidated [Abstract] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Loss contingency, damages awarded Loss Contingency, Damages Awarded, Value Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Operating lease assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 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] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Document Information [Table] Document Information [Table] PEO PEO [Member] Schedule of disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Interest income Investment Income, Interest Change in operating assets and liabilities, net of acquisition: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [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] Accumulated Deficit Retained Earnings [Member] Prepaids and other current assets Prepaid Expense and Other Assets, Current Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Cash and cash equivalents and restricted cash, as of beginning of period Cash and cash equivalents and restricted cash, as of end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income tax expense Income Tax Expense (Benefit) Number of legal actions filed against former and current directors and officers Number Of Legal Actions Filed Against Former And Current Directors And Officers Number Of Legal Actions Filed Against Former And Current Directors And Officers Variable rate Debt Instrument, Basis Spread on Variable Rate Common class B Common Class B [Member] Document Information [Line Items] Document Information [Line Items] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Net (loss) income Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Non-cash operating lease expense Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses Accrued Liabilities, Current Commitments and Contingencies Disclosure [Abstract] Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Operating, general and administrative Operating, general and administrative General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Other revolving credit facilities Other Revolving Credit Facilities [Member] Other Revolving Credit Facilities Subsequent event Subsequent Event [Member] Net actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Weighted-average shares used in computing net income per share attributable to Class A and Class B common stockholders: Weighted Average Number of Shares Outstanding, Basic [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Equity Components [Axis] Equity Components [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Net retail sales Net retail sales Product [Member] Number of reportable segments Number of Reportable Segments Redeemable Noncontrolling Interests Redeemable Noncontrolling Interest [Member] Redeemable Noncontrolling Interest Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Net increase to operating lease right-of-use assets resulting from remeasurements of lease obligations Operating Lease, Increase (Decrease) In Leased Asset, From Remeasurements Of Lease Obligations Operating Lease, Increase (Decrease) In Leased Asset, From Remeasurements Of Lease Obligations Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Total current liabilities Liabilities, Current Credit agreement Credit Agreement [Member] Credit Agreement Litigation Status [Axis] Litigation Status [Axis] Individual: Individual [Axis] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 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] Document fiscal year focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Commitments and Contingencies Contingencies Disclosure [Text Block] Entity Interactive Data Current Entity Interactive Data Current Equity Equity [Abstract] Segment Reporting Segment Reporting Disclosure [Text Block] 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] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Other Commitments [Line Items] Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Schedule of Components of Net Periodic Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Provision for severance benefits Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Restricted cash Restricted Cash and Cash Equivalent, Current Deferred tax assets Deferred Income Tax Assets, Net Repurchase of Class A common stock Repurchase of Class A common stock Stock Repurchased During Period, Value Depreciation and amortization Depreciation, Depletion and Amortization Central Index Key Entity Central Index Key PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving credit facility Revolving Credit Facility [Member] Arrangement Duration Trading Arrangement Duration Deferred revenue Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other investing activities Payment for (Proceeds from) Other Investing Activity Subsequent Event Type [Axis] Subsequent Event Type [Axis] Assets Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Schedule of Supplier Finance Program Supplier Finance Program [Table Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Fair Value Measurement Fair Value Disclosures [Text Block] Credit Facility [Domain] Credit Facility [Domain] 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] Proceeds from short-term debt Proceeds from Short-Term Debt Entity Address, Address Line One Entity Address, Address Line One Redeemable noncontrolling interests, beginning balance Redeemable noncontrolling interests, ending balance Temporary Equity, Including Noncontrolling Interest Entity Address, Address Line Two Entity Address, Address Line Two Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Long-term operating lease obligations Operating Lease, Liability, Noncurrent Foreign currency translation adjustments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Including Redeemable Non-Controlling Interest, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Including Redeemable Non-Controlling Interest, Net of Tax Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Third-party merchant services Third-Party Merchant Services [Member] Third-Party Merchant Services Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Dilutive effect of equity compensation awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Total operating cost and expenses Costs and Expenses Document Quarterly Report Document Quarterly Report Deferred income taxes Deferred Income Taxes and Tax Credits Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Interest cost Defined Benefit Plan, Interest Cost Segment reconciling items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Long-term lease deposits and other Deposits Assets, Noncurrent Restatement Determination Date: Restatement Determination Date [Axis] Issuance of common stock upon exercise of stock options Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Other financing activities Proceeds from (Payment for) Other Financing Activity Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] KFTC vs Coupang KFTC vs Coupang [Member] KFTC vs Coupang Name Trading Arrangement, Individual Name Gaurav Anand [Member] Gaurav Anand All Award Types Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Other Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Acquisition of noncontrolling interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Deferred revenue recognized in period Contract with Customer, Liability, Revenue Recognized MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Re-measurement of noncontrolling interest Noncontrolling Interest, Increase (Decrease) From Re-Measurement Noncontrolling Interest, Increase (Decrease) From Re-Measurement Defined severance benefits and other Defined Benefit Plan And Other Long-Term Liabilities Defined Benefit Plan And Other Long-Term Liabilities Weighted-average shares outstanding Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Equity-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Litigation Case [Axis] Litigation Case [Axis] Segments [Domain] Segments [Domain] Loss contingency, damages sought, value Loss Contingency, Damages Sought, Value Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Inventories Increase (Decrease) in Inventories Developing Offerings Developing Offerings [Member] Developing Offerings Inventories Inventory, Net Minimum Minimum [Member] Penalty payment term (in years) Penalty Payment Term Penalty Payment Term Company Selected Measure Name Company Selected Measure Name Short-term Borrowings and Long-term Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Cash paid for the amount used to measure the operating lease liabilities Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Class A — shares authorized 10,000, outstanding 1,651 and 1,665 Class B — shares authorized 250, outstanding 158 and 158 Common Stock, Value, Issued Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and contingencies (Note 10) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Noncontrolling Interests Noncontrolling Interest [Member] Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Income Taxes Income Tax Disclosure [Text Block] Common class A Common Class A [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Total equity Equity, including portion attributable to noncontrolling interest, beginning balance Equity, including portion attributable to noncontrolling interest, ending balance Equity, including portion attributable to noncontrolling interest Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Earnings per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Actuarial gain on defined severance benefits, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Total net revenues Revenue from Contract with Customer, Excluding Assessed Tax Litigation Status [Domain] Litigation Status [Domain] All Individuals All Individuals [Member] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] 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] Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Debt instrument, average fixed interest rate (in percent) Debt, Weighted Average Interest Rate Proceeds from issuance of common stock, equity-based compensation plan Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Number of penalty payment installments Number of Penalty Payment Installments Number of Penalty Payment Installments Level 1 Fair Value, Inputs, Level 1 [Member] Total segment adjusted EBITDA Total segment adjusted EBITDA Adjusted Earnings Before Interest, Tax, Depreciation and Amortisation Adjusted Earnings Before Interest, Tax, Depreciation and Amortisation Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Money market fund Money Market Fund [Member] Money Market Fund Accrued expenses Increase (Decrease) in Accrued Liabilities Diluted (in usd per share) Earnings Per Share, Diluted Depreciation and amortization Cost, Depreciation and Amortization Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Title of 12(b) Security Title of 12(b) Security Other revenue Service, Other [Member] Earnings per share Earnings Per Share [Abstract] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Defined Severance Benefits Defined Benefit Plan [Text Block] Total gross profit Total gross profit Gross Profit Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Cash paid for income taxes, net of refunds Income Taxes Paid, Net Award Timing Disclosures [Line Items] Current service costs Defined Benefit Plan, Service Cost Dividends paid to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Net (loss) income attributable to Coupang stockholders Net (loss) income attributable to Coupang stockholders Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Other liabilities Increase (Decrease) in Other Operating Liabilities Property and equipment, net Property, Plant and Equipment, Net Earnings per share Net Income (Loss) Attributable to Parent [Abstract] Repurchase of Class A common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable, net Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating (loss) income Operating Income (Loss) Line of credit Line of Credit [Member] Accumulated deficit Retained Earnings (Accumulated Deficit) (Decrease) increase in property and equipment-related accounts payable Capital Expenditure (Income) Incurred But Not Yet Paid (Received) Capital Expenditure (Income) Incurred But Not Yet Paid (Received) Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Repayment of short-term borrowings and long-term debt Repayments of Debt Current fiscal year end date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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] Other (expense) income, net Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Number of subsidiaries involved in litigation Number Of Subsidiaries Involved In Litigation Number Of Subsidiaries Involved In Litigation Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Amortization of: Defined Benefit Plan, Amortization [Abstract] Defined Benefit Plan, Amortization Schedule of Financial Assets Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Anti-dilutive shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment flag Amendment Flag Other Commitments [Table] Other Commitments [Table] Termination Date Trading Arrangement Termination Date Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Debt instrument, variable interest rate, type [extensible enumeration] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Issuance of common stock upon settlement of restricted stock units Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Basic (in shares) Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share repurchase program, remaining authorized, amount Share Repurchase Program, Remaining Authorized, Amount Cost of sales Total cost of sales Cost of Product and Service Sold Schedule of Basic and Diluted Loss Per Share/Common Unit Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Amounts included in accounts payable Supplier Finance Program, Obligation Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number Acquisition and restructuring related gains, net Business Combination, Acquisition and Restructuring Related Gains (Losses), Net Business Combination, Acquisition and Restructuring Related Gains (Losses), Net Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Use of Estimates Use of Estimates, Policy [Policy Text Block] Number of profitability measures Number Of Profitability Measures Of Chief Operating Decision Maker (“CODM”) Number Of Profitability Measures Of Chief Operating Decision Maker (“CODM”) Harold Rogers [Member] Harold Rogers Interest expense Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Foreign currency translation adjustments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Net other revenue Product and Service, Other [Member] Total liabilities Liabilities Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Repurchase of Class A common stock (in shares) Repurchase of Class A common stock (in shares) Stock Repurchased During Period, Shares Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Other current liabilities Other Liabilities, Current Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Class A and Class B Common Stock Common Stock [Member] Net (loss) income Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net (decrease) increase in cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Term Secured Overnight Financing Rate (Term SOFR) [Member] Term Secured Overnight Financing Rate (Term SOFR)