Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Cash collateral pledged Derivative, Collateral, Right to Reclaim Cash Cash collateral received Derivative, Collateral, Obligation to Return Cash Gross amount recognized, asset Derivative Asset, Fair Value, Gross Asset Gross amount eligible for offsetting, asset Derivative Asset, Collateral, Obligation to Return Cash, Offset Net amount, asset Derivative Asset, Fair Value, Amount Not Offset Against Collateral Gross amount recognized, liability Derivative Liability, Fair Value, Gross Liability Gross amount eligible for offsetting, liability Derivative Liability, Collateral, Right to Reclaim Cash, Offset Net amount, liability Derivative Liability, Fair Value, Amount Not Offset Against Collateral Product Warranties Disclosures [Abstract] Schedule of Product Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Americas Americas Segment [Member] Americas Segment [Member] EMEA EMEA Segment [Member] EMEA Segment [Member] Asia Asia Segment [Member] Asia Segment [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning balance Goodwill Currency translation and other Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, ending balance Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating segments Operating Segments [Member] Corporate, Non-Segment Corporate, Non-Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Adjusted EBITDA Adjusted Earnings Before Interest, Income Taxes, Depreciation and Amortization Adjusted Earnings Before Interest, Income Taxes, Depreciation and Amortization Corporate-related costs Other Income (Expense) Items Other Income (Expense) Items Becoming Adient costs Costs Associated With Becoming An Independent Company Costs Associated With Becoming An Independent Company Restructuring and impairment costs Restructuring Costs and Asset Impairment Charges Purchase accounting amortization Intangible Assets, Purchase Accounting Adjustments Intangible Assets, Purchase Accounting Adjustments Restructuring related charges Restructuring Related Charges Restructuring Related Charges - restructuring related charges that do not meet the definition of restructuring under ASC 420. Stock based compensation Allocated Share-based Compensation Expense Depreciation Depreciation, Net of Restructuring Related Depreciation Depreciation, Net of Restructuring Related Depreciation Earnings (loss) before interest and income taxes Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net Net financing charges Interest Income (Expense), Net Other pension income Pension Cost (Reversal of Cost) Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revolving credit facility Revolving Credit Facility [Member] Unsecured debt Unsecured Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Term Loan A - LIBOR plus 1.75% due in 2021 Term Loan A Due 2021 [Member] Term Loan A Due 2021 [Member] 4.875% Notes due in 2026 Notes Due 2026 [Member] Notes Due 2026 [Member] 3.50% Notes due in 2024 Notes Due 2024 [Member] Notes Due 2024 [Member] European Investment Bank Loan - EURIBOR plus 0.90% due in 2022 European Investment Bank Loan due in 2022 [Member] European Investment Bank Loan due in 2022 [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] EURIBOR Eurodollar [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term debt, gross Long-term Debt, Gross Capital lease obligations Capital Lease Obligations Less: debt issuance costs Debt Issuance Costs, Net Gross long-term debt Long-term Debt and Capital Lease Obligations, Including Current Maturities Less: current portion Long-term Debt and Capital Lease Obligations, Current Net long-term debt Long-term Debt and Capital Lease Obligations Basis spread (as percent) Debt Instrument, Basis Spread on Variable Rate Interest rate (as percent) Debt Instrument, Interest Rate, Stated Percentage Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Other Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Current assets Other Current Assets [Member] Noncurrent assets Other Noncurrent Assets [Member] Current liabilities Other Current Liabilities [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Total assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Total liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Business Combinations [Abstract] Acquisitions and Divestitures Mergers, Acquisitions and Dispositions Disclosures [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Patented technology Patents [Member] Customer relationships Customer Relationships [Member] Trademarks Trademarks [Member] Miscellaneous Other Intangible Assets [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Carrying Amount Intangible Assets, Gross (Excluding Goodwill) Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Intangible Assets, Net (Excluding Goodwill) Amortization of intangibles Amortization of Intangible Assets Equity [Abstract] Redeemable Noncontrolling Interest, by Legal Entity [Table] Redeemable Noncontrolling Interest, by Legal Entity [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Member] Redeemable Noncontrolling Interest [Member] Redeemable Noncontrolling Interest [Line Items] Redeemable Noncontrolling Interest [Line Items] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Beginning balance Stockholders' Equity Attributable to Noncontrolling Interest Net income Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Foreign currency translation adjustments Temporary Equity, Foreign Currency Translation Adjustments Dividends Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Change in noncontrolling interest share Temporary Equity, Stock Issued During Period, Value, New Issues Ending balance Segment Information Segment Reporting Disclosure [Text Block] Equity Method Investments and Joint Ventures [Abstract] Net sales Equity Method Investment, Summarized Financial Information, Revenue Gross profit Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) Net income Equity Method Investments Summarized Financial Information Net Income (Loss) Including Noncontrolling Interests Equity Method Investments Summarized Financial Information Net Income (Loss) Including Noncontrolling Interests Net income attributable to the entity Equity Method Investment, Summarized Financial Information, Net Income (Loss) Restructuring and Related Activities [Abstract] Schedule of Restructuring Reserve Restructuring and Related Costs [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Nonconsolidated Partially-Owned Affiliates Equity Method Investments and Joint Ventures Disclosure [Text Block] Revenue from Contract with Customer [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Derivative [Table] Derivative [Table] Long-term debt Long-term Debt [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivatives and Hedging Activities Designated as Hedging Instruments under ASC 815 Designated as Hedging Instrument [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Net Investment Hedging Net Investment Hedging [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Cross-currency interest rate swaps Cross Currency Interest Rate Contract [Member] Foreign currency exchange derivatives Foreign Exchange Contract [Member] Derivative [Line Items] Derivative [Line Items] Percentage of foreign exchange rate exposure hedged, minimum Percentage Of Foreign Exchange Rate Exposure Hedged Minimum Percentage Of Foreign Exchange Rate Exposure Hedged Minimum Percentage of foreign exchange rate exposure hedged, maximum Percentage Of Foreign Exchange Rate Exposure Hedged Maximum Percentage Of Foreign Exchange Rate Exposure Hedged Maximum Notional value of derivative liability Derivative Liability, Notional Amount Number of instruments held Derivative, Number of Instruments Held Notional amount of derivative asset Derivative Asset, Notional Amount Statement of Financial Position [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Schedule of Long-Term Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Net Financing Charges Interest Income and Interest Expense Disclosure [Table Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidations Consolidation, Policy [Policy Text Block] Consolidated VIEs Consolidation, Variable Interest Entity, Policy [Policy Text Block] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Disaggregation of Revenue by Geographical Market Disaggregation of Revenue [Table Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Retirement Benefits [Abstract] Retirement Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Product Warranty Liability [Table] Product Warranty Liability [Table] Adjustments for Error Corrections [Axis] Adjustments for Error Corrections [Axis] Adjustments for Error Correction [Domain] Adjustments for Error Correction [Domain] Prior period expense incurred but not reported Prior Period Incurred Expense, Not Reported [Member] Prior Period Incurred Expense, Not Reported Product Warranty Liability [Line Items] Product Warranty Liability [Line Items] Warranty expense Product Warranty Expense Income Tax Contingency [Table] Income Tax Contingency [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Foreign Tax Authority Foreign Tax Authority [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] GAAS GAAS [Member] GAAS [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Income tax provision (benefit) Income Tax Expense (Benefit) Effective tax rate (as percent) Effective Income Tax Rate Reconciliation, Percent Federal statutory income tax rate (as percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Change in valuation allowance on deferred tax asset Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Net accrued interest Unrecognized Tax Benefits, Interest on Income Taxes Accrued Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Income tax benefit on reduction of deferred tax liability Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Foreign income tax rate differential (as percent) Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Impairment charges on long-lived assets held-for-use Impairment of Long-Lived Assets Held-for-use Income tax benefit associated with impairment charges of long-lived asset Impairment of Long-Lived Assets Held-for-use, Income Tax Benefit Impairment of Long-Lived Assets Held-for-use, Income Tax Benefit Goodwill impairment charge Goodwill, Impairment Loss Income tax benefit associated with goodwill impairment charges Deferred Tax Assets, Goodwill and Intangible Assets Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Assets held for sale Disposal Group, Held-for-sale, Not Discontinued Operations [Member] Disposed of by sale Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Corporate-related Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Detroit Properties and Airplanes Detroit Properties and Airplanes [Member] Detroit Properties and Airplanes [Member] Detroit Airplane Detroit Airplane [Member] Detroit Airplane [Member] Detroit Properties and Airplane Detroit Properties and Airplane [Member] Detroit Properties and Airplane [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Asset impairment charge Asset Impairment Charges Number of airplanes sold Disposal Group, Including Discontinued Operation, Number of Planes Sold Disposal Group, Including Discontinued Operation, Number of Airplanes Sold Consideration for disposal group Disposal Group, Including Discontinued Operation, Consideration Statement of Comprehensive Income [Abstract] Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Realized and unrealized gains (losses) on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to Adient Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Consolidated Entity Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Adient Aerospace Adient Aerospace [Member] Adient Aerospace [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Ownership interest (as percent) Noncontrolling Interest, Ownership Percentage by Parent Initial contributions from joint venture Proceeds from Contributions from Affiliates Debt and Financing Arrangements Debt Disclosure [Text Block] Schedule of Fair Values of Derivative Instruments and Other Amounts Schedule of Derivative Instruments [Table Text Block] Schedule of Gross and Net Amounts of Derivative Instruments and Other Amounts Offsetting Assets [Table Text Block] Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Schedule of Effective Portion of Pretax Gains (Losses) Derivative Instruments, Gain (Loss) [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices in Active Markets (Level 1) Fair Value, Inputs, Level 1 [Member] 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] Fair value of long-term debt Long-term Debt, Fair Value Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Other current assets Other noncurrent assets Other current liabilities Other noncurrent liabilities Other Noncurrent Liabilities [Member] Equity swaps Equity Swap [Member] Derivative asset Derivative Asset Hedging assets Hedging Assets, Current Total assets Assets, Fair Value Disclosure Derivative liability Derivative Liability Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Related Party Transactions [Abstract] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Assets Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable - net Accounts and Other Receivables, Net, Current Inventories Inventory, Net Other current assets Other Assets, Current Current assets Assets, Current Property, plant and equipment - net Property, Plant and Equipment, Net Goodwill Other intangible assets - net Investments in partially-owned affiliates Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Noncurrent Other noncurrent assets Other Assets, Noncurrent Total assets Assets Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Short-term debt Short-term Debt Current portion of long-term debt Accounts payable Accounts Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Restructuring reserve Restructuring Reserve Other current liabilities Other Liabilities, Current Current liabilities Liabilities, Current Long-term debt Pension and postretirement benefits Liability, Defined Benefit Plan, Noncurrent Other noncurrent liabilities Other Liabilities, Noncurrent Long-term liabilities Liabilities, Noncurrent Commitments and Contingencies (Note 16) Commitments and Contingencies Redeemable noncontrolling interests Redeemable Noncontrolling Interest, Equity, Other, Carrying Amount Preferred shares issued, par value $0.001; 100,000,000 shares authorized Zero shares issued and outstanding at March 31, 2019 Preferred Stock, Value, Issued Ordinary shares issued, par value $0.001; 500,000,000 shares authorized 93,610,056 shares issued and outstanding at March 31, 2019 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Shareholders' equity attributable to Adient Stockholders' Equity Attributable to Parent Noncontrolling interests Total shareholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and shareholders' equity Liabilities and Equity Interest expense, net of capitalized interest costs Interest Expense, Debt, Excluding Amortization Banking fees and debt issuance cost amortization Amortization of Debt Issuance Costs Interest income Interest Income, Other Net foreign exchange Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives Net financing charges Fair Value Measurements Fair Value Disclosures [Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Restatement Adjustment Restatement Adjustment [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2017-07 Accounting Standards Update 2017-07 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Cost of sales Cost of Revenue Gross profit Gross Profit Earnings (loss) before interest and income taxes Other pension expense (income) Adjusted EBITDA Adjusted EBITDA Adjusted EBITDA Schedule of Operating Information of Nonconsolidated Partially-owned Affiliates Equity Method Investments [Table Text Block] Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Product Warranties Product Warranty Disclosure [Text Block] Reserves for environmental liabilities Accrual for Environmental Loss Contingencies Original Credit Facilities Original Credit Facilities [Member] Original Credit Facilities [Member] Amended Credit Facilities Amended Credit Facilities [Member] Amended Credit Facilities [Member] Amended Credit Facilities, Tranche 1 Amended Credit Facilities, Tranche One [Member] Amended Credit Facilities, Tranche One [Member] Amended Credit Facilities, Tranche 2 Amended Credit Facilities, Tranche Two [Member] Amended Credit Facilities, Tranche Two [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan Secured Debt [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Prior to July 27, 2019 Debt Instrument, Redemption, Period One [Member] Each quarter thereafter prior to final maturity Debt Instrument, Redemption, Period Two [Member] Credit facility Line of Credit [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Commitment fee (as percent) Line of Credit Facility, Commitment Fee Percentage Net leverage to EBITDA multiple Debt Instrument, Covenant Compliance, Net Leverage Ratio to EBITDA Debt Instrument, Covenant Compliance, Net Leverage Ratio to EBITDA Repayments of lines of credit Repayments of Lines of Credit Commitment fee on unused portion of commitments (as percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Face amount of debt Debt Instrument, Face Amount Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Impaired Long-Lived Assets Held and Used by Type [Axis] Impaired Long-Lived Assets Held and Used by Type [Axis] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Fixed Assets Fixed Assets [Member] Fixed Assets [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] 2019 Restructuring Plan Restructuring Plan 2019 [Member] Restructuring Plan 2019 [Member] 2018 Restructuring Plan Restructuring Plan 2018 [Member] Restructuring Plan, 2018 [Member] 2017 Restructuring Plan Restructuring Plan 2017 [Member] Restructuring Plan 2017 [Member] 2016 Restructuring Plan Restructuring Plan 2016 [Member] Restructuring Plan 2016 [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee Severance and Termination Benefits Employee Severance [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring and impairment costs, gross Restructuring Costs and Asset Impairment Charges, Gross Restructuring Costs and Asset Impairment Charges, Gross Underspend Restructuring Reserve, Accrual Adjustment Restructuring and impairment costs Number of positions eliminated to date Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Number of positions eliminated Restructuring and Related Cost, Number of Positions Eliminated Number of plants expected to close Restructuring and Related Cost, Expected Number of Plants Closed Restructuring and Related Cost, Expected Number of Plants Closed Number of plants closed Restructuring and Related Cost, Number of Plants Closed, Inception to Date Restructuring and Related Cost, Number of Plants Closed, Inception to Date Fixed asset impairment charges Segment Reconciling Items Segment Reconciling Items [Member] Equity income (loss) Income (Loss) from Equity Method Investments Depreciation Depreciation Capital Expenditures Payments to Acquire Productive Assets Total Assets Schedule of the Fair Value Hierarchy for Assets and Liabilities Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Carrying Amounts and Classifications of Assets and Liabilities for Consolidated VIEs Schedule of Variable Interest Entities [Table Text Block] Schedule of Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of New Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Net sales to related parties Revenue from Related Parties Purchases from related parties Related Party Transaction, Purchases from Related Party Accounts receivable due from related parties Accounts Receivable, Related Parties Accounts payable due to related parties Accounts Payable, Related Parties Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Cash Flow Hedging Cash Flow Hedging [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of sales Cost of Sales [Member] Net financing charges Selling, General and Administrative Expenses [Member] Selling, general and administrative Interest Expense [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Pre-tax gains (losses) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Effective portion of pretax gain (loss) reclassified from AOCI into income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Pre-tax gain (loss) on foreign currency exchange derivatives not designated as hedging instrument Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Pre-tax gain (loss) on equity swap derivatives not designated as hedging instrument Gain (Loss) on Equity Contract Derivative Instruments Not Designated as Hedging Instruments Gain (Loss) on Equity Contract Derivative Instruments Not Designated as Hedging Instruments Pre-tax gain (loss) on derivatives Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Effective portion of pretax gains (loss) related to net investment hedges Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax Gains (losses) reclassified into income for net investment hedges Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), Reclassification, before Tax Ineffective portion of gain (loss) recognized in income Derivative, Excluded Component, Gain, Recognized in Earnings Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Regional elimination Geography Eliminations [Member] Inter-segment elimination Intersegment Eliminations [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES Mexico MEXICO Other Americas Americas, Other Than United States And Mexico [Member] Americas, Other Than United States And Mexico Germany GERMANY Other EMEA Other EMEA, Excluding Germany [Member] Other EMEA, Excluding Germany [Member] China CHINA Other Asia Asia, Excluding China [Member] Asia, Excluding China Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Number of reportable segments Number of Reportable Segments Weighted average cost of capital Goodwill, Reporting Unit, Weighted Average Cost of Capital Goodwill, Reporting Unit, Weighted Average Cost of Capital Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Balance at beginning of period Standard Product Warranty Accrual Accruals for warranties issued during the period Standard Product Warranty Accrual, Increase for Warranties Issued Changes in accruals related to pre-existing warranties (including changes in estimates) Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Settlements made (in cash or in kind) during the period Standard Product Warranty Accrual, Decrease for Payments Balance at end of period Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivatives and Hedging Activities Not Designated as Hedging Instruments under ASC 815 Not Designated as Hedging Instrument [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative asset, current Derivative Asset, Current Hedging assets, current Derivative asset, noncurrent Derivative Asset, Noncurrent Hedging assets, noncurrent Hedging Assets, Noncurrent Derivative asset Derivative liability, current Derivative Liability, Current Derivative liability, noncurrent Derivative Liability, Noncurrent Derivative liability Numerator: Earnings Per Share, Basic and Diluted [Abstract] Net income (loss) attributable to Adient Net Income (Loss) Attributable to Parent Denominator: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Earnings per share, Basic (in dollars per share) Earnings Per Share, Basic Earnings per share, Diluted (in dollars per share) Earnings Per Share, Diluted Changes In Shareholder's Equity [Table] Changes In Shareholder's Equity [Table] Changes In Shareholder's Equity [Table] Ordinary Shares Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Shareholders' Equity Attributable to Adient Parent [Member] Shareholders' Equity Attributable to Noncontrolling Interests Noncontrolling Interest [Member] Changes In Shareholder's Equity [Line Items] Changes In Shareholder's Equity [Line Items] [Line Items] for Changes In Shareholder's Equity [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period Share based compensation Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options Other Adjustments to Additional Paid in Capital, Other Net income (loss) attributable to Adient Net income (loss) attributable to noncontrolling interest Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Dividends declared Dividends Cash dividends Payments of Dividends Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Excluding Portion Attributable to Temporary Equity, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Excluding Portion Attributable to Temporary Equity, Net of Tax Realized and unrealized gains (losses) on derivatives Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Employee retirement plans Other Comprehensive Income (Loss), Pension And Other Postretirement Benefit Plans, Adjustments, Net Of Tax Other Comprehensive Income (Loss), Pension And Other Postretirement Benefit Plans, Adjustments, Net Of Tax Dividends attributable to noncontrolling interests Change in noncontrolling interest share Noncontrolling Interest, Period Increase (Decrease) Formation of consolidated joint venture Noncontrolling Interest, Increase from Subsidiary Equity Issuance Balance at end of period Cash dividends declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Current Reporting Status Entity Current Reporting Status Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus (Q1,Q2,Q3,FY) Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Restructuring and Impairment Costs Restructuring and Related Activities Disclosure [Text Block] Intersegment Eliminations Net sales Inventory Disclosure [Abstract] Raw materials and supplies Inventory, Raw Materials, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventories Inventories Inventory Disclosure [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Eurodollar North American Subfacility North American Subfacility [Member] North American Subfacility [Member] European Subfacility European Subfacility [Member] European Subfacility [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Adient US LLC Adient US LLC [Member] Adient US LLC [Member] Adient US and Adient Global Holdings S.à r.l. Adient US and Adient Global Holdings S.à r.l. [Member] Adient US and Adient Global Holdings S.à r.l. [Member] Line of Credit Senior Notes Senior Notes [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Letter of Credit Letter of Credit [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Days prior to the maturity date Debt Instrument, Springing Maturity Date, Days Prior To The Maturity Date Debt Instrument, Springing Maturity Date, Days Prior To The Maturity Date Accordion feature to expand borrowing capacity Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Term of loan Debt Instrument, Term Repayment rate of principal per annum (as percent) Debt Instrument, Periodic Payment, Principal, Quarterly Interest Rate Debt Instrument, Periodic Payment, Principal, Quarterly Interest Rate Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Step down in basis spread on variable rate Debt Instrument, Effective Interest Rate, Step Down Debt Instrument, Effective Interest Rate, Step Down Aggregate amount of incremental term loans Debt Instruments, Aggregate Amount Of Incremental Term Loans Debt Instruments, Aggregate Amount Of Incremental Term Loans Pro forma first lien secured net leverage ratio covenant Debt Instruments, Covenant Terms, Maximum Pro Forma First Lien Secured Net Leverage Ratio Debt Instruments, Covenant Terms, Maximum Pro Forma First Lien Secured Net Leverage Ratio Number of VIE entities Variable Interest Entity, Number of Entities Variable Interest Entity, Number of Entities Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Corporate Joint Venture Corporate Joint Venture [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] YFAI YFAI [Member] YFAI [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Futuris Futuris [Member] Futuris [Member] Costs Associated With Becoming An Independent Company Costs Associated With Becoming An Independent Company [Member] Costs Associated With Becoming An Independent Company [Member] Restructuring Related Charges Restructuring Related Charges [Member] Restructuring Related Charges [Member] SS&M Seating, Seat Structures and Mechanisms [Member] Seating, Seat Structures and Mechanisms [Member] Becoming Adient Costs - non cash Noncash Costs Associated With Becoming An Independent Company Noncash Costs Associated With Becoming An Independent Company Stock base compensation excluded Depreciation expense excluded Futuris integration cost Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed US tax reform impact at YFAI Prior period adjustments Prior Period Reclassification Adjustment Non-recurring consulting fee Professional Fees Other pension income Schedule of Financial Information for Reportable Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Adjustments to reconcile net income (loss) to cash provided (used) by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Pension and postretirement benefit expense (benefit) Pension and Other Postretirement Benefits Cost (Reversal of Cost) Pension and postretirement contributions, net Increase (decrease) Pension & OPEB Increase (decrease) Pension & OPEB: Amount of payment or receipts for pension and other postretirement benefits. Equity in earnings of partially-owned affiliates, net of dividends received (includes purchase accounting amortization of $0, and $11, respectively) Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Deferred income taxes Deferred Income Taxes and Tax Credits Non-cash impairment charges Equity-based compensation Share-based Compensation Other Other Noncash Income (Expense) Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Other assets Increase (Decrease) in Other Operating Assets Restructuring reserves Increase (Decrease) in Restructuring Reserve Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Accrued income taxes Increase (Decrease) in Accrued Taxes Payable Cash provided (used) by operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Changes in long-term investments Payments for (Proceeds from) Investments Other Payments for (Proceeds from) Other Investing Activities Cash provided (used) by investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Increase (decrease) in short-term debt Proceeds from (Repayments of) Short-term Debt Repayment of long-term debt Repayments of Long-term Debt Debt financing costs Payments of Financing Costs Cash dividends Dividends paid to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Formation of consolidated joint venture Other Proceeds from (Payments for) Other Financing Activities Cash provided (used) by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of period Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Settlement (gain) loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Schedule of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Equity and Noncontrolling Interests Stockholders' Equity Note Disclosure [Text Block] Purchase accounting amortization Finite-Lived Intangible Assets, Purchase Accounting Adjustments Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated other comprehensive income (loss), end of period Foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Realized and unrealized gains (losses) on derivatives Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Pension and postretirement plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Aggregate adjustment for the period, net of tax Current period changes in fair value, net of tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Reclassification to income, net of tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net reclassifications to AOCI Schedule of Stockholders Equity Schedule of Stockholders Equity [Table Text Block] Schedule of AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Changes in Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Gross profit Selling, general and administrative expenses Selling, General and Administrative Expense Net financing charges Net income (loss) Income (loss) attributable to noncontrolling interests Net income (loss) attributable to Adient Shares used in computing earnings per share, Basic (in shares) Shares used in computing earnings per share, Diluted (in shares) Related Party Transactions Related Party Transactions Disclosure [Text Block] Other Other Restructuring [Member] Currency Translation Foreign Currency Gain (Loss) [Member] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring Reserve Beginning Balance Utilized—cash Payments for Restructuring Utilized—noncash Restructuring Reserve, Settled without Cash Noncash adjustment—underspend Restructuring Reserve Ending Balance Schedule of Inventories Schedule of Inventory, Current [Table Text Block]