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Revenue [Table] Current restructuring reserve - other current liabilities Restructuring Reserve, Current Entity Interactive Data Current Entity Interactive Data Current Income attributable to noncontrolling interests Income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Restructuring charges Restructuring Charges, Gross Restructuring Charges, Gross Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Entity Small Business Entity Small Business Czech Republic CZECHIA Comprehensive income (loss) attributable to Adient Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Term Loan B due in 2031 Term Loan B - LIBOR plus 3.25% due in 2028 [Member] Term Loan B - LIBOR plus 3.25% due in 2028 Germany GERMANY Effective Income Tax Rate Reconciliation [Table] Effective Income Tax Rate Reconciliation [Table] Asia Asia Segment [Member] Asia Segment Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Noncurrent restructuring reserve - other noncurrent liabilities Restructuring Reserve, Noncurrent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Net financing charges Net financing charges Net financing charges Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Product Warranties Product Warranty Disclosure [Text Block] Other current liabilities Other Liabilities, Current Other bank borrowings and finance lease obligations Other Banks Borrowings and Finance Lease Obligations [Member] Other Banks Borrowings and Finance Lease Obligations Other noncurrent assets Other Assets, Noncurrent Document Type Document Type Acquisition of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Other current assets Other current assets Derivative Asset, Current Fair Value as of Grant Date Award Grant Date Fair Value Short Short [Member] Settlement of derivatives Proceeds from derivative instrument Proceeds from Derivative Instrument, Investing Activities Schedule of Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Issuance of long-term debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Net Investment Hedging Net Investment Hedging [Member] Repayment of debt Payment for Debt Extinguishment or Debt Prepayment Cost Income (loss) before income taxes Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and Contingencies (Note 17) Commitments and Contingencies Net sales Revenues Net foreign exchange Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives Gross Carrying Amount Intangible Asset, Finite-Lived, before Accumulated Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Gain on sale Equity Method Investment, Realized Gain (Loss) on Disposal Equity income Income (Loss) from Equity Method Investments Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Equity, Attributable to Noncontrolling Interest [Roll Forward] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] China CHINA Weighted average shares outstanding Earnings Per Share, Basic and Diluted, Other Disclosure [Abstract] Earnings Per Share, Basic and Diluted, Other Disclosure Goodwill [Roll Forward] Goodwill [Roll Forward] Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Inventories Inventories Inventory, Net All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount 2026 (excluding the nine months ended June 30, 2026) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Fair Value Measurements Fair Value Disclosures [Text Block] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Transfer of intellectual property rights Effective Income Tax Rate Reconciliation, Transfer Of Intellectual Property Rights, Amount Effective Income Tax Rate Reconciliation, Transfer Of Intellectual Property Rights, Amount Earnings (loss) before interest and income taxes Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net PEO Name PEO Name Geographical [Axis] Geographical [Axis] Technotrim, Inc. Technotrim, Inc. [Member] Technotrim, Inc. Percentage of foreign exchange rate exposure hedged, maximum (as percentage) Percentage Of Foreign Exchange Rate Exposure Hedged Maximum Percentage Of Foreign Exchange Rate Exposure Hedged Maximum Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Total interest paid Interest Expense, Debt Utilized - cash Payments for Restructuring Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash collateral pledged Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Payments to acquire businesses Payments to Acquire Businesses, Gross Equity-based compensation Share-Based Payment Arrangement, Noncash Expense Total lease cost Lease, Cost Long Long [Member] Gain on disposal transactions Gain (Loss) On Disposal Transactions Gain (Loss) On Disposal Transactions Net amount, liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral Investment, Name [Domain] Investment, Name [Domain] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Leases Lessee, Operating Leases [Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in usd per share) Earnings Per Share, Basic Share repurchases Payments for Repurchase of Common Stock Current assets Current assets Assets, Current Weighted average remaining lease term: Weighted-average Remaining Lease [Abstract] Weighted-average Remaining Lease Statistical Measurement[Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Schedule of Effective Portion of Pretax Gains (Losses) Derivative Instruments, Gain (Loss) [Table Text Block] Operating leases: Assets and Liabilities, Lessee [Abstract] Cost of sales Purchases from related parties Cost of Revenue Award Type Award Type [Axis] Foreign currency exchange derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Short-term lease cost Short-Term Lease, Cost Debt financing costs Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Schedule of Operating Lease Right of Use Assets and Operating Lease Liabilities Schedule Of Operating Lease Right Of Use Assets And Operating Lease Liabilities [Table Text Block] Schedule Of Operating Lease Right Of Use Assets And Operating Lease Liabilities Accumulated deficit Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Realized and unrealized gains (losses) on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] 7.50% Notes due in 2033 Notes Due 2033 [Member] Notes Due 2033 Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Ordinary Shares Common Stock [Member] Affilliates Affiliates [Member] Affiliates Supplier finance program, obligation, current Supplier Finance Program, Obligation, Current 4.875% Notes due in 2026 Notes Due 2026 [Member] Notes Due 2026 [Member] Employee Severance and Termination Benefits Employee Severance [Member] Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Organization and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Restructuring-related activities Restructuring Related Charges, Net Restructuring Related Charges - restructuring related charges that do not meet the definition of restructuring under ASC 420. Foreign currency translation adjustments Temporary Equity, Foreign Currency Translation Adjustments Equity Method Investment, Nonconsolidated Investee or Group of Investees Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Setex, Inc. Setex, Inc. [Member] Setex, Inc. Interest expense, net of capitalized interest costs Interest Expense, Debt, Excluding Amortization Pension and postretirement contributions, net Increase (Decrease) Pension And OPEB Increase (decrease) Pension & OPEB: Amount of payment or receipts for pension and other postretirement benefits. Derivative Contract [Domain] Derivative Contract [Domain] Currency translation Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Noncurrent Hedging Relationship [Domain] Hedging Relationship [Domain] Transaction costs Transaction Costs Transaction Costs Other noncurrent liabilities Derivative Liability, Noncurrent Revenues related to prior year sales, percent Revenue From Contract With Customer, Excluding Assessed Tax, Related To Prior Year Sales, Percent Revenue From Contract With Customer, Excluding Assessed Tax, Related To Prior Year Sales, Percent Total liabilities and shareholders' equity Liabilities and Equity Interest income Interest Income, Other Employee Stock Option Share-Based Payment Arrangement, Option [Member] Foreign currency exchange derivatives Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Noncontrolling interests Beginning balance Ending balance Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Restructuring charges Plan charges Restructuring Charges Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Affiliates, Partially-Owned Affiliates, Partially-Owned [Member] Affiliates, Partially-Owned ABL Credit Facility And Other Bank Borrowings ABL Credit Facility And Other Bank Borrowings [Member] ABL Credit Facility And Other Bank Borrowings Shareholders' Equity Attributable to Adient Parent [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Restructured Facility Restructured Facility [Member] Restructured Facility Entity Address, Country Entity Address, Country Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Schedule of Changes in Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Preferred shares issued, par value $0.001; 100,000,000 shares authorized, Zero shares issued and outstanding at June 30, 2026 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Business divestitures Proceeds From Divestiture Of Business, Net Proceeds From Divestiture Of Business, Net Reclassification to income, net of tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net income Net income attributable to the entity Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Average fixed interest rate (as percentage) Derivative, Average Fixed Interest Rate Hedging Designation [Domain] Hedging Designation [Domain] Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] 8.25% Notes due 2031 Notes Due 2031 [Member] Notes Due 2031 Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Purchase of noncontrolling interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Hedging Designation [Axis] Hedging Designation [Axis] Credit Facility [Axis] Credit Facility [Axis] Restructuring and Impairment Costs Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets Assets, Fair Value Disclosure Long-term debt Net long-term debt Long-Term Debt and Lease Obligation Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Credit facility expansion Line of Credit Facility, Increase (Decrease), Net Americas Americas Segment [Member] Americas Segment Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Noncash Income (Expense) Mexico MEXICO Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net purchase consideration Business Combination, Consideration Transferred Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Other EMEA Other EMEA (Excluding Germany) [Member] Other EMEA (Excluding Germany) 2025 Restructuring Plan and Past Plans 2025 Restructuring Plan And Past Plans [Member] 2025 Restructuring Plan And Past Plans Goodwill, impairment loss Goodwill, Impairment Loss Purchase accounting amortization Intangible Assets, Purchase Accounting Adjustments Intangible Assets, Purchase Accounting Adjustments Name Trading Arrangement, Individual Name Position [Domain] Position [Domain] Raw materials and supplies Inventory, Raw Materials, Net of Reserves Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Company Selected Measure Amount Company Selected Measure Amount Derivatives and Hedging Activities Not Designated as Hedging Instruments under ASC 815 Not Designated as Hedging Instrument [Member] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Entity Address, Address Line Two Entity Address, Address Line Two Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Operating leases (in years) Operating Lease, Weighted Average Remaining Lease Term Total liabilities Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Senior notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Operating leases (non-cash activity) Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income tax provision Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Award Timing Method Award Timing Method [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Korea KOREA, REPUBLIC OF VIEs Variable Interest Entity, Primary Beneficiary [Member] Net income (loss) attributable to Adient Net income (loss) attributable to Adient Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Reconciling Items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Percentage of foreign exchange rate exposure hedged minimum (as percentage) Percentage Of Foreign Exchange Rate Exposure Hedged Minimum Percentage Of Foreign Exchange Rate Exposure Hedged Minimum Derivative, term of contract Derivative, Contract Term Gross amount recognized, assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Japan JAPAN Effective portion of pretax gains (loss) related to net investment hedges Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]