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Cover Page - shares
9 Months Ended
Jun. 28, 2024
Jul. 26, 2024
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 28, 2024  
Document Transition Report false  
Entity File Number 1-7463  
Entity Registrant Name JACOBS SOLUTIONS INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 88-1121891  
Entity Address, Address Line One 1999 Bryan Street  
Entity Address, Address Line Two Suite 3500  
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  
Title of 12(b) Security Common Stock  
Trading Symbol J  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   124,248,327
Entity Central Index Key 0000052988  
Current Fiscal Year End Date --09-27  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q3  
Amendment Flag false