| Cover | Sep. 19, 2023 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 19, 2023 |
| 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 | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001099590 |
| Amendment Flag | false |
| Common Stock, $0.001 par value per share | |
| Document Information [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 | |
| Document Information [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 | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 3.125% Notes due 2031 |
| Trading Symbol | MELI31 |
| Security Exchange Name | NASDAQ |
