Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information
12 Months Ended
Mar. 31, 2019
Document And Entity Information [Abstract]  
Document Type 20-F
Amendment Flag false
Document Period End Date Mar. 31, 2019
Document Fiscal Year Focus 2019
Document Fiscal Period Focus FY
Trading Symbol JHX
Entity Registrant Name James Hardie Industries plc
Entity Central Index Key 0001159152
Current Fiscal Year End Date --03-31
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Emerging Growth Company false
Entity Shell Company false
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 442,269,905