XML 12 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Cover - shares
 3 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2020  
Document Transition Report false  
Entity File Number 1-16129  
Entity Registrant Name FLUOR CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 33-0927079  
Entity Address, Address Line One 6700 Las Colinas Boulevard  
Entity Address, City or Town Irving,  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 75039  
City Area Code 469  
Local Phone Number 398-7000  
Entity Current Reporting Status No  
Entity Interactive Data Current No  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   140,609,216
Entity Central Index Key 0001124198  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Common Stock | NEW YORK STOCK EXCHANGE, INC.    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, $.01 par value per share  
Trading Symbol FLR  
Security Exchange Name NYSE  
Preferred Stock Purchase Rights | NEW YORK STOCK EXCHANGE, INC.    
Entity Information [Line Items]    
Title of 12(b) Security Preferred Stock Purchase Rights  
Trading Symbol FLR  
Security Exchange Name NYSE