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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Crypto Asset Information (Details) $ in Millions | Dec. 31, 2023 USD ($) Units Unit | Dec. 31, 2022 USD ($)
--- | --- | ---
Significant Accounting Policies [Line Items] |  |
Intangible assets at fair value | $ 24 | $ 0
Bitcoin |  |
Significant Accounting Policies [Line Items] |  |
Cost basis | 6 |
Intangible assets at fair value | $ 17 |
Number of units held | Unit | 412.7 |
Ether |  |
Significant Accounting Policies [Line Items] |  |
Cost basis | $ 3 |
Intangible assets at fair value | $ 7 |
Number of units held | Units | 3,041.6 |

X
- Definition Crypto Asset, Cost + References No definition available. + Details
Name: | meli_CryptoAssetCost
Namespace Prefix: | meli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Crypto Asset, Fair Value + References No definition available. + Details
Name: | meli_CryptoAssetFairValue
Namespace Prefix: | meli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Crypto Asset, Number of Units + References No definition available. + Details
Name: | meli_CryptoAssetNumberOfUnits
Namespace Prefix: | meli_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Significant accounting policies. + References No definition available. + Details
Name: | meli_SignificantAccountingPoliciesLineItems
Namespace Prefix: | meli_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CryptoAssetAxis=meli_BitcoinMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CryptoAssetAxis=meli_EtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |