Capped Call Transactions, Cash Received

No definition available.

Name:	meli_CappedCallTransactionsCashReceived
Namespace Prefix:	meli_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Capped Call Transactions, Common Stock Received

+ References

No definition available.

+ Details

Name:	meli_CappedCallTransactionsCommonStockReceived
Namespace Prefix:	meli_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Capped Call Transactions, Estimated Shares Eligible To Receive On Settlement Date

+ References

No definition available.

+ Details

Name:	meli_CappedCallTransactionsEstimatedSharesEligibleToReceiveOnSettlementDate
Namespace Prefix:	meli_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Common Stock, Closing Price Per Share

+ References

No definition available.

+ Details

Name:	meli_CommonStockClosingPricePerShare
Namespace Prefix:	meli_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Conversion, Converted Instrument, Principal Amount Used Per Conversion

+ References

No definition available.

+ Details

Name:	meli_DebtConversionConvertedInstrumentPrincipalAmountUsedPerConversion
Namespace Prefix:	meli_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Conversion, Converted Instrument Rate, Number Of Shares Per Principal Amount

+ References

No definition available.

+ Details

Name:	meli_DebtConversionConvertedInstrumentRateNumberOfSharesPerPrincipalAmount
Namespace Prefix:	meli_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Closing Trading Amount Price Per Share

+ References

No definition available.

+ Details

Name:	meli_DebtInstrumentClosingTradingAmountPricePerShare
Namespace Prefix:	meli_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument Convertible Conversion Price, Percent

+ References

No definition available.

+ Details

Name:	meli_DebtInstrumentConvertibleConversionPricePercent
Namespace Prefix:	meli_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Number Of Notes Requested For Conversion

+ References

No definition available.

+ Details

Name:	meli_DebtInstrumentNumberOfNotesRequestedForConversion
Namespace Prefix:	meli_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Remaining Consideration Allocated To Reacquisition Of Equity Component

+ References

No definition available.

+ Details

Name:	meli_DebtInstrumentRemainingConsiderationAllocatedToReacquisitionOfEquityComponent
Namespace Prefix:	meli_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Total Amount Paid

+ References

No definition available.

+ Details

Name:	meli_DebtInstrumentTotalAmountPaid
Namespace Prefix:	meli_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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+ Details

Name:	us-gaap_AmortizationOfFinancingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4332-108586

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
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+ Details

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

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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-Paragraph 5
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+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

+ References

+ Details

Name:	us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

+ Details

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

- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentConvertibleThresholdTradingDays
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Name Accounting Standards Codification
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-SubTopic 20
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+ Details

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

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
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-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
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-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

+ Details

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

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 470
-Section 50
-Paragraph 3
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+ Details

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

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt premium.

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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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-Section 45
-Paragraph 28
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-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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-Topic 210
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+ Details

Name:	us-gaap_LineOfCredit
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 the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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

+ Details

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

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

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-Name Accounting Standards Codification
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+ Details

Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=meli_SustainabilityNotesDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=meli_NoteDue2031Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=meli_SustainabilityNotes2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=meli_TwoThousandTwentyEightConvertibleSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=meli_InitialIssuance2028ConvertibleSeniorNotesMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=meli_AdditionalIssuance2028ConvertibleSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=meli_MeasurementPeriodTwoMember
Namespace Prefix:
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Balance Type:
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Loans Payable And Other Financial Liabilities - Narrative (Details)			1 Months Ended			2 Months Ended	12 Months Ended
	Jan. 14, 2021 USD ($)	Aug. 24, 2018 USD ($) $ / shares $ / item shares	Aug. 31, 2021 USD ($) shares	Jun. 30, 2021 USD ($) shares	Jan. 31, 2021 USD ($)	Feb. 24, 2023 note	Dec. 31, 2022 USD ($) day note $ / shares $ / item shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2022 USD ($)	Nov. 30, 2020 USD ($)	Aug. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Nov. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage							0.3125%
Line of credit facility, borrowings outstanding							$ 0
Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Line of credit facility, interest margin							1.25%
Subsidiaries \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 400,000,000
2.375% Sustainability Notes due 2026
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000,000
Debt instrument, interest rate	2.375%
2031 Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 700,000,000
Debt instrument, interest rate	3.125%
2026 Sustainability Notes
Debt Instrument [Line Items]
Debt issuance costs	$ 11,000,000
2028 Notes
Debt Instrument [Line Items]
Debt conversion, converted instrument, principal amount							$ 7,000
Number of notes requested for conversion \| note							7
Loss on extinguishment of debt					$ 49,000,000
2028 Notes \| Subsequent Event
Debt Instrument [Line Items]
Number of notes requested for conversion \| note						2
Convertible Senior Notes \| Initial Issuance - 2028 Convertible Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 800,000,000
Debt instrument, interest rate		2.00%
Converted instrument, principal amount used per conversion \| $ / item		1,000
Convertible senior notes, conversion price (in dollars per share) \| $ / shares		$ 443.40
Converted instrument rate, number of shares per principal amount \| shares		2.2553
Convertible Senior Notes \| Additional Issuance - 2028 Convertible Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 80,000,000
Convertible Senior Notes \| 2028 Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 880,000,000															$ 880,000,000
Debt instrument, interest rate		2.00%															2.00%
Debt issuance costs							$ 3,000,000	$ 4,000,000
Debt instrument convertible conversion price, percent		130.00%
Amount paid to enter into capped call transactions					101,000,000						$ 120,000,000	$ 83,000,000	$ 104,000,000	$ 8,000,000	$ 88,000,000	$ 11,000,000	$ 92,000,000
Capped call transactions, cash received			$ 295,000,000	$ 102,000,000
Capped call transactions, common stock received (shares) \| shares			89,978	57,047
Common Stock repurchased (in shares) \| shares			158,413	71,175
Shares able to obtain (in shares) \| shares							177,016
Repurchased principal amount					440,000,000
Total amount paid					1,865,000,000
Loss on extinguishment of debt					30,000,000
Paid in premium					19,000,000
Remaining consideration allocated to reacquisition of equity component					$ 1,484,000,000
Estimated fair value							$ 884,000,000	1,367,000,000
Closing trading amount price per share \| $ / item							100
Common stock, closing price per share \| $ / shares							$ 846.24
Debt instrument convertible, if-converted value in excess of principal							$ 399,000,000
Debt instrument outstanding							439,000,000	439,000,000
Amortization of debt issuance costs							$ 1,000,000	$ 0	$ 1,000,000
30 Day Measurement Period \| Convertible Senior Notes \| 2028 Notes
Debt Instrument [Line Items]
Debt instrument, convertible trading days \| day							20
Debt instrument, convertible consecutive trading days \| day							30
Measurement Period \| Convertible Senior Notes \| 2028 Notes
Debt Instrument [Line Items]
Debt instrument, convertible trading days \| day							5
Debt instrument, convertible consecutive trading days \| day							5
Percentage of debt conversion price							98.00%
Debt Instrument, Redemption, Period One \| 2031 Notes
Debt Instrument [Line Items]
Redemption percentage	100.00%
Debt Instrument, Redemption, Period One \| 2026 Sustainability Notes
Debt Instrument [Line Items]
Redemption percentage	100.00%
Debt Instrument, Redemption, Period Two \| 2031 Notes
Debt Instrument [Line Items]
Redemption percentage	100.00%
Debt Instrument, Redemption, Period Two \| 2026 Sustainability Notes
Debt Instrument [Line Items]
Redemption percentage	100.00%
Debt Instrument, Redemption, Period Three \| 2031 Notes
Debt Instrument [Line Items]
Redemption percentage	101.00%
Debt Instrument, Redemption, Period Three \| 2026 Sustainability Notes
Debt Instrument [Line Items]
Redemption percentage	101.00%