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Cover Page
Apr. 13, 2022
Apr. 12, 2022
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Apr. 13, 2022  
Entity Registrant Name Jacobs Engineering Group Inc.  
Entity Incorporation, State or Country Code DE  
Entity File Number 1-7463  
Entity Tax Identification Number   95-4081636
Entity Address, Address Line One 1999 Bryan Street  
Entity Address, Address Line Two Suite 1200  
Entity Address, City or Town Dallas  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 75201  
City Area Code 214  
Local Phone Number 583-8500  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Stock  
Trading Symbol J  
Security Exchange Name NYSE  
Entity Emerging Growth Company false  
Entity Central Index Key 0000052988  
Amendment Flag false