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Summary of Significant Accounting Policies (Assets, Liabilities and Net Assets of Company's Venezuelan Subsidiaries) (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Significant Accounting Policies [Line Items] |  |  |
Net revenues | $ 148,103,000 us-gaap_SalesRevenueServicesNet | $ 115,382,000 us-gaap_SalesRevenueServicesNet |
Assets | 976,783,000 us-gaap_Assets |  | 966,848,000 us-gaap_Assets
Liabilities | (645,665,000)us-gaap_Liabilities |  | (611,060,000)us-gaap_Liabilities
Venezuelan Operations [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Net revenues | 13,955 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember | 19,357 us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember |
Assets | 41,587 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember |  | 75,153 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember
Liabilities | (38,565)us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember |  | (43,359)us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember
Net Assets | $ 3,022 us-gaap_AssetsNet / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember |  | $ 31,794 us-gaap_AssetsNet / us-gaap_StatementBusinessSegmentsAxis = meli_VenezuelanSubsidiaryMember

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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