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Cover - USD ($)
 12 Months Ended
Dec. 31, 2022
Feb. 22, 2023
Jun. 30, 2022
Entity Addresses [Line Items]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2022    
Document Transition Report false    
Entity File Number 001-33647    
Entity Registrant Name MercadoLibre, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 98-0212790    
Entity Address, Address Line One WTC Free Zone    
Entity Address, Address Line Two Dr. Luis Bonavita 1294,    
Entity Address, Address Line Three Of. 1733, Tower II    
Entity Address, City or Town Montevideo    
Entity Address, Country UY    
Entity Address, Postal Zip Code 11300    
Country Region +598    
City Area Code 2    
Local Phone Number 927-2770    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 26,089,586,448
Entity Common Stock, Shares Outstanding   50,257,751  
Documents Incorporated By Reference
Documents Incorporated By Reference
Portions of the Company’s Definitive Proxy Statement relating to its 2022 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission within 120 days of the Company’s fiscal year ended December 31, 2022, are incorporated by reference in Part III, Items 10-14 of this Annual Report on Form 10-K as indicated herein.
    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001099590    
Amendment Flag false    
Common stock      
Entity Addresses [Line Items]      
Title of 12(b) Security Common Stock, $0.001 par value per share    
Trading Symbol MELI    
Security Exchange Name NASDAQ    
2.375% Sustainability Notes due 2026      
Entity Addresses [Line Items]      
Title of 12(b) Security 2.375% Sustainability Notes due 2026    
Trading Symbol MELI26    
Security Exchange Name NASDAQ    
3.125% Notes due 2031      
Entity Addresses [Line Items]      
Title of 12(b) Security 3.125% Notes due 2031    
Trading Symbol MELI31    
Security Exchange Name NASDAQ