XML 41 R1.htm IDEA: XBRL DOCUMENT v3.19.3
Document and Entity Information - USD ($)
$ / shares in Units, $ in Billions
 12 Months Ended
Sep. 30, 2019
Oct. 31, 2019
Mar. 31, 2019
Sep. 30, 2018
Document Documentand Entity Information [Abstract]        
Title of 12(b) Security Ordinary Shares, Par Value $0.01      
Entity Incorporation, State or Country Code L2      
Document Transition Report false      
Document Annual Report true      
Document Type 10-K      
Amendment Flag false      
Document Period End Date Sep. 30, 2019      
Entity File Number 001-13836      
Document Fiscal Year Focus 2019      
Document Fiscal Period Focus FY      
Trading Symbol JCI      
Entity Registrant Name JOHNSON CONTROLS INTERNATIONAL PLC      
Entity Central Index Key 0000833444      
Current Fiscal Year End Date --09-30      
Entity Well-known Seasoned Issuer Yes      
Entity Current Reporting Status Yes      
Entity Voluntary Filers No      
Entity Filer Category Large Accelerated Filer      
Entity Common Stock, Shares Outstanding   771,419,761    
Entity Public Float     $ 33.1  
Ordinary shares, par value $ 0.01     $ 0.01
Entity Tax Identification Number 98-0390500      
Entity Address, Address Line One One Albert Quay      
Entity Address, City or Town Cork      
Entity Address, Country IE      
Entity Address, Postal Zip Code T12 X8N6      
City Area Code 353      
Local Phone Number 21-423-5000      
Security Exchange Name NYSE      
Entity Interactive Data Current Yes      
Entity Emerging Growth Company false      
Entity Small Business false      
Entity Shell Company false      
Documents Incorporated by Reference [Text Block] Portions of the definitive Proxy Statement to be delivered to shareholders in connection with the annual general meeting of shareholders to be held on March 4, 2020 are incorporated by reference into Part III.