v3.26.1
Document And Entity Information - shares
 6 Months Ended
Mar. 31, 2026
Apr. 30, 2026
Document And Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 1-10596  
Entity Registrant Name ESCO TECHNOLOGIES INC.  
Entity Incorporation, State or Country Code MO  
Entity Tax Identification Number 43-1554045  
Entity Address, Address Line One 645 MARYVILLE CENTRE DR  
Entity Address, Address Line Two SUITE 300  
Entity Address, City or Town ST. LOUIS  
Entity Address, State or Province MO  
Entity Address, Postal Zip Code 63141-5855  
City Area Code 314  
Local Phone Number 213-7200  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol ESE  
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   25,907,172
Entity Central Index Key 0000866706  
Current Fiscal Year End Date --09-30  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false