v3.19.2
Document and Entity Information - USD ($)
12 Months Ended
Jun. 30, 2019
Aug. 15, 2019
Dec. 31, 2018
Document and Entity Information [Abstract]      
Entity Registrant Name HENRY JACK & ASSOCIATES INC    
Entity Central Index Key 0000779152    
Current Fiscal Year End Date --06-30    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Jun. 30, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   77,000,307  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Shell Company false    
Entity Public Float     $ 10,791,330,916