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Commitment and Contingencies - Buyer Protection Program (Details) - Buyer Protection Program - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Provision for maximum potential exposure	$ 4,002	$ 2,964
Provision for recorded allowance	$ 6	$ 5

X

- Definition

Product Liability, Contingency, Recorded Allowance

+ References

No definition available.

+ Details

Name:	meli_ProductLiabilityContingencyRecordedAllowance
Namespace Prefix:	meli_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Present value of the accrual for product liability loss contingencies as of the balance sheet date (if the accrual qualifies for discounting).

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=meli_BuyerProtectionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: