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Net Income Per Share - Allocation of Net Income Available to Common Shareholders using Two-Class Method (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share [Abstract] |  |  |
Net income | $ 72,652,771 us-gaap_ProfitLoss | $ 117,526,263 us-gaap_ProfitLoss | $ 101,346,147 us-gaap_ProfitLoss
Net loss attributable to noncontrolling interests | (72,220)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (18,825)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (98,849)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Change in redeemable amount of noncontrolling interest | (434,717)us-gaap_MinorityInterestPeriodIncreaseDecrease | 9,644 us-gaap_MinorityInterestPeriodIncreaseDecrease | 359,398 us-gaap_MinorityInterestPeriodIncreaseDecrease
Net income attributable to MercadoLibre, Inc. Shareholders corresponding to common stock, Basic | 72,145,834 meli_NetIncomeAttributableToCommonStockHoldersBasic | 117,517,082 meli_NetIncomeAttributableToCommonStockHoldersBasic | 101,606,696 meli_NetIncomeAttributableToCommonStockHoldersBasic
Net income | 72,652,771 us-gaap_ProfitLoss | 117,526,263 us-gaap_ProfitLoss | 101,346,147 us-gaap_ProfitLoss
Net loss attributable to noncontrolling interests | (72,220)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (18,825)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (98,849)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Change in redeemable amount of noncontrolling interest | (434,717)us-gaap_MinorityInterestPeriodIncreaseDecrease | 9,644 us-gaap_MinorityInterestPeriodIncreaseDecrease | 359,398 us-gaap_MinorityInterestPeriodIncreaseDecrease
Net income attributable to MercadoLibre, Inc. Shareholders corresponding to common stock, Diluted | $ 72,145,834 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 117,517,082 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 101,606,696 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted

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- Definition Net income attributable to MercadoLibre, Inc., basic. + References No definition available. + Details
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- Details
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- Definition Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568740-111683 + Details
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- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
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- Definition Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
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