v3.25.2
Cover Page - USD ($)
 12 Months Ended
Jun. 30, 2025
Aug. 08, 2025
Dec. 31, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Period End Date Jun. 30, 2025    
Document Transition Report false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --06-30    
Entity File Number 0-14112    
Entity Registrant Name JACK HENRY & ASSOCIATES, INC.    
Entity Central Index Key 0000779152    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 43-1128385    
Entity Address, Address Line One 663 Highway 60, P.O. Box 807    
Entity Address, City or Town Monett    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 65708    
City Area Code 417    
Local Phone Number 235-6652    
Title of 12(b) Security Common Stock ($0.01 par value)    
Trading Symbol JKHY    
Security Exchange Name NASDAQ    
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 Emerging Growth Company false    
Entity Small Business false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 12,705,842,343
Entity Common Stock, Shares Outstanding   72,871,385  
Documents Incorporated by Reference Portions of the Company's Proxy Statement for its 2025 Annual Meeting of Stockholders (the "Proxy Statement") are incorporated by reference into Part III of this Report to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission ("SEC") within 120 days of the Company's fiscal year ended June 30, 2025.    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Kansas City, Missouri