Document And Entity Information
Oct. 31, 2019
Document And Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Oct. 31, 2019
Entity Registrant Name MercadoLibre, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-33647
Entity Tax Identification Number 98-0212790
Entity Address, Address Line One Arias 3751, 7th Floor
Entity Address, City or Town Buenos Aires
Entity Address, Country AR
Entity Address, Postal Zip Code C1430CRG
City Area Code 5411
Local Phone Number 4640-8000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.001 par value per share
Trading Symbol MELI
Security Exchange Name NASDAQ
Entity Central Index Key 0001099590
Entity Emerging Growth Company false
Amendment Flag false