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Document And Entity Information - USD ($)
 12 Months Ended
Sep. 30, 2025
Nov. 14, 2025
Document And Entity Information [Abstract]    
Document Type 10-K  
Document Annual Report true  
Document Period End Date Sep. 30, 2025  
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 Drive, 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 Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
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  
ICFR Auditor Attestation Flag true  
Document Financial Statement Error Correction [Flag] false  
Entity Shell Company false  
Entity Public Float $ 4,095,000,000  
Entity Common Stock, Shares Outstanding   25,846,125
Entity Central Index Key 0000866706  
Current Fiscal Year End Date --09-30  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus FY  
Amendment Flag false  
Auditor Name GRANT THORNTON LLP  
Auditor Firm ID 248  
Auditor Location St. Louis, Missouri