XML 12 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Cover Page - shares
 6 Months Ended
Jun. 30, 2019
Jul. 18, 2019
Cover page.    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Registrant Name WORLD FUEL SERVICES CORP  
Entity Central Index Key 0000789460  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   65,381,871
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Title of 12(b) Security Common Stock , $0.01 par value  
Trading Symbol INT  
Security Exchange Name NYSE  
Entity File Number 1-9533  
Entity Incorporation, State or Country Code FL  
Entity Tax Identification Number 59-2459427  
Entity Address, Address Line One 9800 N.W. 41st Street,  
Entity Address, City or Town Miami,  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33178  
City Area Code 305  
Local Phone Number 428-8000  
Document Quarterly Report true  
Document Transition Report false