Debt Instrument, Extension Term

No definition available.

Name:	cpng_DebtInstrumentExtensionTerm
Namespace Prefix:	cpng_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Interest Bearing Term

+ References

No definition available.

+ Details

Name:	cpng_DebtInstrumentInterestBearingTerm
Namespace Prefix:	cpng_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=cpng_CreditFacilityMaturingJanuary2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=cpng_KRWDenominatedBankCertificateOfDepositRateMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=cpng_AmendedCreditFacilityMaturingJanuary2022Member
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Balance Type:
Period Type:

- Details

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Short-Term Borrowings and Long-Term Debt - Short-Term Borrowings - Narrative (Details) - Line of credit - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Jan. 31, 2022	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2019
Credit Facility, Maturing January 2022
Debt Instrument [Line Items]
Debt instrument term		1 year
Pledged assets			$ 1,300
Debt instrument, extension term				364 days
Debt instrument, interest bearing term				91 days
Line of credit, unused capacity, commitment fee percentage				0.75%
Credit Facility, Maturing January 2022 \| KRW Denominated Bank Certificate of Deposit Rate
Debt Instrument [Line Items]
Variable interest rate (in percentage)			3.25%	3.25%
Amended Credit Facility, Maturing January 2022 \| Subsequent event
Debt Instrument [Line Items]
Line of credit facility, borrowing limit	$ 1
Debt instrument, interest bearing term	91 days
Amended Credit Facility, Maturing January 2022 \| KRW Denominated Bank Certificate of Deposit Rate \| Subsequent event
Debt Instrument [Line Items]
Variable interest rate (in percentage)	1.80%