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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4 </documentType> |
| <periodOfReport> 2020-07-01 </periodOfReport> |
| <issuer> |
| | <issuerCik> 0001670541 </issuerCik> |
| | <issuerName> Adient plc </issuerName> |
| | <issuerTradingSymbol> ADNT </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001193775 </rptOwnerCik> |
| | | <rptOwnerName> DELGROSSO DOUGLAS G </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> 49200 HALYARD DRIVE </rptOwnerStreet1> |
| | | <rptOwnerStreet2></rptOwnerStreet2> |
| | | <rptOwnerCity> PLYMOUTH </rptOwnerCity> |
| | | <rptOwnerState> MI </rptOwnerState> |
| | | <rptOwnerZipCode> 48170 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 1 </isDirector> |
| | | <isOfficer> 1 </isOfficer> |
| | | <officerTitle> President and CEO </officerTitle> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable> |
| | <nonDerivativeTransaction> |
| | | <securityTitle> |
| <value> Ordinary Shares </value> |
| </securityTitle> |
| | | <transactionDate> |
| <value> 2020-07-01 </value> |
| </transactionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> A </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| </transactionCoding> |
| | | <transactionTimeliness></transactionTimeliness> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 23315 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <value> 0 </value> |
| <footnoteId id="F1"/> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 186158.915 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </nonDerivativeTransaction> |
| | </nonDerivativeTable> |
| <footnotes> |
| | <footnote id="F1"> Reflects a grant of restricted stock units that will vest in two tranches. One half of the restricted stock units will vest on the date that is six months from the grant date, and the remaining half will vest on the date that is one year from the grant date (subject to pro rata or full continued or accelerated vesting upon certain retirements, other terminations of employment, death or disability). </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Joshua A. Agen, attorney-in-fact for Douglas G. DelGrosso </signatureName> |
| | <signatureDate> 2020-07-02 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |