XML 22 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Jan. 31, 2021
Jun. 30, 2020
Cover page.      
Document Annual Report true    
Document Transition Report false    
Document Type 10-K    
Document Period End Date Dec. 31, 2020    
Entity File Number 0-1402    
Entity Registrant Name LINCOLN ELECTRIC HOLDINGS INC    
Entity Incorporation, State or Country Code OH    
Entity Tax Identification Number 34-1860551    
Entity Address, Address Line One 22801 St. Clair Avenue    
Entity Address, City or Town Cleveland    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44117    
City Area Code 216    
Local Phone Number 481-8100    
Title of 12(b) Security Common Shares, without par value    
Trading Symbol LECO    
Security Exchange Name NASDAQ    
Entity Central Index Key 0000059527    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Interactive Data Current Yes    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 4,865,968,514
Entity Common Stock, Shares Outstanding   59,662,036  
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
ICFR Auditor Attestation Flag true    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false