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Cover Page
 12 Months Ended
Dec. 31, 2024
shares
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2024
Document Fiscal Year Focus 2024
Document Fiscal Period Focus FY
Trading Symbol LAR
Entity Registrant Name LITHIUM ARGENTINA AG
Entity Central Index Key 0001440972
Current Fiscal Year End Date --12-31
Entity Interactive Data Current Yes
Entity Current Reporting Status Yes
Entity Emerging Growth Company false
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Common Stock, Shares Outstanding 161,931,734
Title of 12(b) Security Registered common shares, $0.01 par value per share
Security Exchange Name NYSE
Entity File Number 001-38350
Entity Incorporation, State or Country Code V8
Entity Address, Address Line One Dammstrasse 19
Entity Address, City or Town Zug
Entity Address, Country CH
Entity Address, Postal Zip Code 6300
Document Annual Report true
Document Registration Statement false
Document Transition Report false
Document Shell Company Report false
Entity Filer Category Accelerated Filer
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Auditor Name PricewaterhouseCoopers LLP
Auditor Firm ID 271
Auditor Location Vancouver, Canada
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Address Line One 900 West Hastings Street
Entity Address, Address Line Two Suite 300
Entity Address, City or Town Vancouver
Entity Address, State or Province BC
Entity Address, Country CA
Entity Address, Postal Zip Code V6C 1E5
City Area Code 778
Local Phone Number 653-8092
Contact Personnel Name Alex Shulga
Contact Personnel Email Address alex.shulga@lithium-argentina.com