Revenue Recognition - Narratives (Details)	6 Months Ended
Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenues related to prior year sales, percent	1.00%

Revenue From Contract With Customer, Excluding Assessed Tax, Related To Prior Year Sales, Percent

No definition available.

Name:	adnt_RevenueFromContractWithCustomerExcludingAssessedTaxRelatedToPriorYearSalesPercent
Namespace Prefix:	adnt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration