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Cover Page Document
Aug. 03, 2021
Aug. 01, 2021
Cover [Abstract]    
Entity Central Index Key 0000789460  
Entity Registrant Name WORLD FUEL SERVICES CORPORATION  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Entity Address, Address Line One 9800 N.W. 41st Street,  
Entity Incorporation, State or Country Code FL  
Document Type 8-K  
Document Period End Date   Aug. 01, 2021
Entity File Number 1-9533  
Entity Tax Identification Number 59-2459427  
Entity Address, City or Town Miami,  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33178  
Trading Symbol INT  
Security Exchange Name NYSE  
City Area Code 305  
Local Phone Number 428-8000  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Amendment Flag false  
Entity Emerging Growth Company false