XML 17 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information Document
 12 Months Ended
Sep. 30, 2017
USD ($)
shares
Entity Information [Line Items]  
Entity Registrant Name Adient plc
Entity Central Index Key 0001670541
Current Fiscal Year End Date --09-30
Entity Filer Category Large Accelerated Filer
Document Type 10-K
Document Period End Date Sep. 30, 2017
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Public Float | $ $ 6,809,000,000
Document Fiscal Year Focus 2017
Document Fiscal Period Focus FY
Amendment Flag false
Entity Common Stock, Shares Outstanding | shares 93,142,283