Description of the Plans (Details)	12 Months Ended
Dec. 31, 2025 USD ($) year loan
EBP 001 ADNT
EBP, Description of Plan [Line Items]
Maximum annual compensation, percentage	50.00%
Fixed rate contribution, percentage	2.00%
EBP 001 AVZR
EBP, Description of Plan [Line Items]
Maximum annual compensation, percentage	25.00%
EBP 002
EBP, Description of Plan [Line Items]
Maximum annual compensation, percentage	50.00%
Automatic employer matching contribution, percentage	3.00%
Employer contribution, matching percentage	90.00%
Participant compensation matched, percentage	6.00%
EBP 002 \| Minimum
EBP, Description of Plan [Line Items]
Employer contribution, matching percentage	0.00%
EBP 002 \| Maximum
EBP, Description of Plan [Line Items]
Employer contribution, matching percentage	100.00%
EBP 003
EBP, Description of Plan [Line Items]
Maximum annual compensation, percentage	25.00%
EBP Plans
EBP, Description of Plan [Line Items]
Investment incremental percentage	1.00%
Maximum vesting age \| year	65
Minimum vesting age \| year	55
Minimum service period	10 years
Forfeiture, consecutive years of no reemployment	6 years
Minimum borrowing amount \| $	$ 1,000
Maximum borrowing amount \| $	$ 50,000
Maximum borrowing amount, percentage of total	50.00%
Maximum number of loans outstanding per participant \| loan	2
Maximum borrowing term	5 years
EBP Plans \| Minimum
EBP, Description of Plan [Line Items]
Vesting service period	2 years
EBP Plans \| Maximum
EBP, Description of Plan [Line Items]
Vesting service period	5 years

EBP, Employer Contribution, Annual Fixed Rate Contribution, Percentage

No definition available.

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

- Definition

EBP, Employer Contribution Maximum Vesting Age

+ References

No definition available.

+ Details

Name:	adnt_EBPEmployerContributionMaximumVestingAge
Namespace Prefix:	adnt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution Minimum Service Period

+ References

No definition available.

+ Details

Name:	adnt_EBPEmployerContributionMinimumServicePeriod
Namespace Prefix:	adnt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution Minimum Vesting Age

+ References

No definition available.

+ Details

Name:	adnt_EBPEmployerContributionMinimumVestingAge
Namespace Prefix:	adnt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution Vesting Service Period

+ References

No definition available.

+ Details

Name:	adnt_EBPEmployerContributionVestingServicePeriod
Namespace Prefix:	adnt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Forfeited, Consecutive Years Of No Reemployment

+ References

No definition available.

+ Details

Name:	adnt_EBPForfeitedConsecutiveYearsOfNoReemployment
Namespace Prefix:	adnt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Maximum Borrowing Term

+ References

No definition available.

+ Details

Name:	adnt_EBPNoteReceivableFromParticipantMaximumBorrowingTerm
Namespace Prefix:	adnt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Maximum Number Of Loans Outstanding

+ References

No definition available.

+ Details

Name:	adnt_EBPNoteReceivableFromParticipantMaximumNumberOfLoansOutstanding
Namespace Prefix:	adnt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Accounts, Investment Incremental Percentage

+ References

No definition available.

+ Details

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

- Definition

EBP, Participant Contribution, Automatic, Employer Contribution Matched, Percentage

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationToTotalCompensationPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=adnt_EBP001ADNTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=adnt_EBP001AVZRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=adnt_EBP002Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=adnt_EBP003Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=adnt_EBPPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: