Debt Instrument, Total Amount Paid

No definition available.

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

- Definition

Amount of amortization expense attributable to debt issuance costs.

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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.

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

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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

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

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Period Type:	duration

- Definition

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

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Increase for accrued, but unpaid interest on the debt instrument for the period.

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Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

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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.

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

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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

- Definition

Amount of gain (loss) from the difference between the repurchase price of a debt instrument initially issued by the entity and the net carrying amount of the debt at the time of its repurchase.

+ References

No definition available.

+ Details

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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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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

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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

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Period Type:	instant

- Details

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- Details

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Period Type:

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

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LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Narrative (Details)				3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2024 USD ($)	Nov. 13, 2023 USD ($) shares	Sep. 19, 2023	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jan. 14, 2021 USD ($)	Aug. 31, 2018 USD ($)
Debt Instrument [Line Items]
Gain in interest income and other financial gains				$ 3,000,000		$ 8,000,000	$ 8,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing under the facility				0		0
2.375% Sustainability Notes due 2026
Debt Instrument [Line Items]
Convertible senior notes, interest rate									2.375%
Face amount									$ 400,000,000
2031 Notes
Debt Instrument [Line Items]
Convertible senior notes, interest rate									3.125%
Face amount									$ 700,000,000
Repurchased principal amount				51,000,000		51,000,000		$ 70,000,000
2026 Sustainability Notes
Debt Instrument [Line Items]
Repurchased principal amount				$ 27,000,000		27,000,000		9,000,000
Sustainability Notes Due 2026 And 2031
Debt Instrument [Line Items]
Interest accrued								(1,000,000)
Total amount paid						$ 71,000,000		$ 66,000,000
Initial Issuance - 2028 Convertible Senior Notes \| Convertible Senior Notes
Debt Instrument [Line Items]
Convertible senior notes, interest rate			2.00%
2028 Notes \| Convertible Senior Notes
Debt Instrument [Line Items]
Convertible senior notes, interest rate										2.00%
Face amount										$ 880,000,000
Conversion ratio			0.0022952
Amortization of debt issuance costs					$ 2,000,000		$ 7,000,000
2028 Notes \| Convertible Senior Notes \| Notes Converted Into Non Cash Transactions
Debt Instrument [Line Items]
Total principal amount		$ 439,000,000
2028 Notes \| Convertible Senior Notes \| Notes Converted Into Non Cash Transactions \| Common Stock, $0.001 par value per share
Debt Instrument [Line Items]
Converted shares (in shares) \| shares		1,007,597
The Amended And Restated Credit Agreement \| Line of Credit \| Subsidiaries \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000
Basis spread on variable rate	1.00%
Commitment fee annual rate	25.00%
The Amended And Restated Credit Agreement \| Line of Credit \| Subsidiaries \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.90%
The Amended And Restated Credit Agreement \| Line of Credit \| Subsidiaries \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.15%