Inventory Disclosure [Abstract]
Inventory Disclosure [Text Block]
Inventory Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Revolving Credit Facility [Member]
Revolving Credit Facility [Member]
Term Loan A [Member]
Term Loan A [Member]
Term Loan A [Member]
Term Loan B [Member]
Term Loan B [Member]
Term Loan B [Member]
7.75% Notes [Member]
7.75% Notes [Member]
7.75% Notes [Member]
6.625% Notes [Member]
6.625% Notes [Member]
6.625% Notes [Member]
6.50% Notes [Member]
6.50% Notes [Member]
6.50% Notes
6.25% Notes Due 2026 [Member]
6.25% Notes Due 2026 [Member]
6.25% Notes Due 2026 [Member]
6.25% Notes due 2025 [Member]
6.25% Notes due 2025 [Member]
6.25% Notes due 2025
6.25% Notes Due 2021 [Member]
6.25% Notes Due 2021 [Member]
6.25% Notes Due 2021 [Member]
5.125% Notes [Member]
5.125% Notes [Member]
5.125% Notes
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Reported Value Measurement [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Estimate of Fair Value Measurement [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 2 [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]
Line of Credit Facility, Amount Outstanding
Long-term Line of Credit
Long-term Debt
Long-term Debt
Supplemental Guarantor Condensed Consolidating Financial Statements [Abstract]
Supplemental Guarantor Condensed Consolidating Financial Statements [Abstract]
Supplemental Guarantor Disclosure [Text Block]
Supplemental Guarantor Disclosure [Text Block]
The entire Supplemental Guarantor disclosure. [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Metaldyne Performance Group, Inc. [Member]
Metaldyne Performance Group, Inc. [Member]
Metaldyne Performance Group, Inc. [Member]
USM Mexico Manufacturing LLC [Member]
USM Mexico Manufacturing LLC [Member]
USM Mexico Manufacturing LLC [Member]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Driveline [Member]
Driveline [Member]
Driveline [Member]
Metal Forming [Member]
Metal Forming [Member]
Metal Forming [Member]
Powertrain [Member]
Powertrain [Member]
Powertrain [Member]
Casting [Member]
Casting [Member]
Casting [Member]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Goodwill [Line Items]
Goodwill [Line Items]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Goodwill
Goodwill
Goodwill, Acquired During Period
Goodwill, Acquired During Period
Goodwill, Written off Related to Sale of Business Unit
Goodwill, Written off Related to Sale of Business Unit
Goodwill, Foreign Currency Translation Gain (Loss)
Goodwill, Translation and Purchase Accounting Adjustments
Goodwill
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Other Operating Income (Expense) [Member]
Other Operating Income (Expense) [Member]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Supplemental Executive Retirement Plan (SERP) [Member]
Supplemental Executive Retirement Plan (SERP) [Member]
Supplemental Executive Retirement Plan (SERP) [Member]
Pension Plan [Member]
Pension Plan [Member]
Other Postretirement Benefits Plan [Member]
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment
Components of net periodic benefit cost other than service cost
Components of net periodic benefit cost other than service cost
Components of net periodic benefit cost other than service cost
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Expected asset return
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Amortized loss
Defined Benefit Plan, Amortization of Gain (Loss)
Curtailment
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement
Amortized prior service credit
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Net periodic benefit cost (credit)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Net periodic benefit cost
Other Postretirement Benefits Cost (Reversal of Cost)
Reclassifications out of Accumulated Other Comprehensive Income (Loss) [Abstract]
Reclassifications out of Accumulated Other Comprehensive Income (Loss) [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Statement [Line Items]
Statement [Line Items]
Defined benefit plans - Beginning balance
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
Defined benefit plans, other comprehensive income (loss), before reclassifications
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax
Income tax effect of other comprehensive income (loss) before reclassifications
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax
Defined benefit plans, amounts reclassified from accumulated other comprehensive income (loss)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Income taxes reclassified into net income
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax
Defined benefit plans, net current period other comprehensive income (loss)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Defined benefit plans - Ending balance
Foreign currency translation adjustments - Beginning balance
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Foreign currency translation adjustments, other comprehensive income (loss) arising during period
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Foreign currency translation adjustments, amounts reclassified from accumulated other comprehensive income (loss)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax
Foreign currency translation adjustments, net current period other comprehensive income (loss)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Foreign currency translation adjustments - Ending balance
Unrecognized gain (loss) on cash flow hedges - Beginning balance
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Unrecognized gain (loss) on cash flow hedges, other comprehensive income (loss) arising during period
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax
Other comprehensive income (loss), derivatives qualifying as hedges, tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
Unrecognized gain (loss) on cash flow hedges, amounts reclassified from accumulated other comprehensive income (loss)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Unrecognized loss on cash flow hedges - Ending balance
Accumulated other comprehensive income (loss), net of tax - Beginning balance
Accumulated Other Comprehensive Income (Loss), Net of Tax
Other comprehensive income (loss) arising during period, total
Other Comprehensive Income (Loss) Arising During Period, Total, Before Tax
Other Comprehensive Income (Loss) Arising During Period, Total, Before Tax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Other comprehensive income (loss), reclassification before tax
Other Comprehensive Income (Loss), Reclassification Adjustments, Total, Before Tax
Represents the total of reclassification adjustments out of Accumulated Other Comprehensive Income (Loss) into net income (loss) during the period, before tax.
Reclassification from AOCI, Current Period, Tax
Reclassification from AOCI, Current Period, Tax
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Accumulated other comprehensive income (loss), net of tax - Ending balance
Disclosure of Reclassification Amount [Text Block]
Disclosure of Reclassification Amount [Text Block]
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Numerator
Numerator [Abstract]
Numerator [Abstract]
Net income attributable to AAM
Net Income (Loss) Attributable to Parent
Less: Net income attributable to participating securities
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic
Net income attributable to common shareholders - Basic and Dilutive
Net Income (Loss) Available to Common Stockholders, Diluted
Denominators
Denominator [Abstract]
Denominator [Abstract]
Basic - Weighted-average shares outstanding
weighted average common shares and participating securities outstanding - basic
weighted average common shares and participating securities outstanding - basic
Basic - Less: Participating securities
Participating securities - basic
Participating securities - basic
Basic - Weighted-average common shares outstanding
Weighted Average Number of Shares Outstanding, Basic
Effect of dilutive securities - dilutive stock-based compensation
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Diluted - Adjusted weighted-average shares after assumed conversions
Weighted Average Number of Shares Outstanding, Diluted
Basic EPS
Earnings Per Share, Basic
Diluted EPS
Earnings Per Share, Diluted
Supplemental Guarantor Condensed Consolidated Financial Statements [Abstract]
Supplemental Guarantor Condensed Consolidated Financial Statements [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Unsecured Debt [Member]
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Ownership in Subsidiary, Percentage
Ownership in Subsidiary, Percentage
Represents the percentage ownership in subsidiary by the parent company.
Debt Instrument, Interest Rate, Stated Percentage
Debt Instrument, Interest Rate, Stated Percentage
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]
Schedule of Long-term Debt Instruments [Table Text Block]
Disaggregation of Revenue [Abstract]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Domain]
Contract with Customer, Basis of Pricing [Domain]
Contract with Customer, Duration [Axis]
Contract with Customer, Duration [Axis]
Contract with Customer, Duration [Domain]
Contract with Customer, Duration [Domain]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Domain]
Timing of Transfer of Good or Service [Domain]
Contract with Customer, Sales Channel [Axis]
Contract with Customer, Sales Channel [Axis]
Contract with Customer, Sales Channel [Domain]
Contract with Customer, Sales Channel [Domain]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table 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]
Computer Software, Intangible Asset [Member]
Computer Software, Intangible Asset [Member]
In Process Research and Development [Member]
In Process Research and Development [Member]
Customer Platforms - Intangible Assets [Member]
Customer Platforms - Intangible Assets [Member]
Customer Platforms - Intangible Assets [Member]
Customer Relationships - Intangible Assets [Member]
Customer Relationships - Intangible Assets [Member]
Customer Relationships - Intangible Assets [Member]
Technology-Based Intangible Assets [Member]
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit
Intangible Assets, Written off Related to Sale of Business Unit, Net
Intangible Assets, Written off Related to Sale of Business Unit, Net
Intangible Assets, Written off Related to Sale of Business Unit, Accumulated Amortization
Intangible Assets, Written off Related to Sale of Business Unit, Accumulated Amortization
Intangible Assets, Written off Related to Sale of Business Unit, Accumulated Amortization
Finite-Lived Intangible Assets, Gross
Finite-Lived Intangible Assets, Gross
Finite-Lived Intangible Assets, Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Finite-Lived Intangible Assets, Net
Finite-Lived Intangible Assets, Net
Amortization of Intangible Assets
Amortization of Intangible Assets
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year
Finite-Lived Intangible Assets, Amortization Expense, Year Two
Finite-Lived Intangible Assets, Amortization Expense, Year Two
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Inventory, Current [Table]
Inventory, Current [Table]
Inventory [Axis]
Inventory [Axis]
Inventory [Domain]
Inventory [Domain]
Inventory [Line Items]
Inventory [Line Items]
Raw materials and work-in-progress
Inventory, Work in Process and Raw Materials
Finished goods
Inventory, Finished Goods, Gross
Gross inventories
Inventory, Gross
Inventory valuation reserves
Inventory Valuation Reserves
Inventories, net
Inventory, Net
Income Statement [Abstract]
Senior Notes [Member]
Senior Notes [Member]
Capital Lease Obligations [Member]
Capital Lease Obligations [Member]
Statement, Scenario [Axis]
Net sales
Revenues
Cost of goods sold
Cost of Goods and Services Sold
Gross profit
Gross Profit
Selling, general and administrative expenses
Selling, General and Administrative Expense
Amortization of intangible assets
Restructuring and acquisition-related costs
Restructuring and acquisition-related costs
Costs incurred for restructuring initiatives as well as expenses directly related to acquisition activity.
Gain on sale of business
Gain (Loss) on Disposition of Business
Operating income
Operating Income (Loss)
Interest expense
Interest Expense
Investment income
Investment Income, Interest
Debt refinancing and redemption costs
Gain (Loss) on Extinguishment of Debt
Gain on settlement of capital lease
Gain (loss) on settlement of capital lease
Gain (loss) on settlement of capital lease
Other income (expense), net
Other Nonoperating Income (Expense)
Income tax expense
Income Tax Expense (Benefit)
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net income attributable to AAM
Basic earnings per share
Diluted earnings per share
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Contractual purchase price
Payments to Acquire Businesses, Gross
Adjustment to contractual purchase price for working capital settlement
Adjustments to Contractual Purchase Price for Working Capital Settlement
Adjustments to Contractual Purchase Price for Working Capital Settlement
Adjustment to contractual purchase price for capital equipment
Adjustments to Contractual Purchase Price for Capital Equipment
Adjustments to contractual purchase price for capital equipment
Adjustment to contractual purchase price for settlement of existing accounts payable balance
Adjustment to Contractual Purchase Price - Existing Payable Balance
Adjustment to Contractual Purchase Price - Existing Payable Balance
Cash acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Adjusted purchase price, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Accounts receivable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
Inventories
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory
Prepaid expenses and other
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Property, plant and equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Total assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Accounts payable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable
Accrued expenses and other
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other
Deferred income tax liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent
Net assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Goodwill
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Foreign Exchange Forward [Member]
Foreign Exchange Forward [Member]
Foreign Exchange Option [Member]
Foreign Exchange Option [Member]
Interest Rate Swap [Member]
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) by Income Statement Location [Axis]
Income Statement and Other Comprehensive Income (Loss) Location [Domain]
Cost of Sales [Member]
Cost of Sales [Member]
Nonoperating Income (Expense) [Member]
Other Nonoperating Income (Expense) [Member]
Interest Expense [Member]
Interest Expense [Member]
Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Cash Flow Hedging [Member]
Cash Flow Hedging [Member]
Scenario, Forecast [Member]
Scenario, Forecast [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Income Statement Location Gain (Loss) Reclassified from Accumulated OCI
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Interest expense
Cash flow hedge gain (loss) to be reclassified within twelve months
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months
Description of Location of Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments in Financial Statements
Description of Location of Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments in Financial Statements
Derivative Instruments Not Designated as Hedging Instruments, Gain
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net
Schedule of Inventory, Current [Table Text Block]
Schedule of Inventory, Current [Table Text Block]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
North America [Member]
North America [Member]
Asia [Member]
Asia [Member]
Europe [Member]
Europe [Member]
South America [Member]
South America [Member]
Revenue, Performance Obligation, Description of Payment Terms
Revenue, Performance Obligation, Description of Payment Terms
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs [Table Text Block]
Restructuring and Related Costs [Table Text Block]
Business Combination, Separately Recognized Transactions [Table Text Block]
Business Combination, Separately Recognized Transactions [Table Text Block]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Total consideration transferred
Business Combination, Consideration Transferred
Net debt acquired
Business Combination, Net Debt to be Assumed by Acquiring Entity
Business Combination, Net Debt to be Assumed by Acquiring Entity. Gross Debt Assumed Less Cash Acquired.
Debt acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt
Business acquisition, share price
Business Acquisition, Share Price
Business acquisition, equity interest issued or issuable, number of shares
AAM Common Stock Issued per MPG Common Stock as Part of the Merger Consideration
AAM Common Stock Issued per MPG Common Stock as Part of the Merger Consideration
Proceeds from Notes Payable
Proceeds from Notes Payable
Proceeds from Issuance of Long-term Debt
Proceeds from Issuance of Long-term Debt
Goodwill, purchase accounting adjustments
Goodwill, Purchase Accounting Adjustments
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Business Acquisition, Pro Forma Revenue
Business Acquisition, Pro Forma Revenue
Business Acquisition, Pro Forma Net Income (Loss)
Business Acquisition, Pro Forma Net Income (Loss)
Business Acquisition, Pro Forma Earnings Per Share, Diluted
Business Acquisition, Pro Forma Earnings Per Share, Diluted
MPG Pro Forma Net Income Adjustment
MPG Pro Forma Net Income Adjustment
MPG Pro Forma Net Income Adjustment
Product Warranties Disclosures [Abstract]
Product Liability Contingency [Table]
Product Liability Contingency [Table]
Product Liability Contingency [Line Items]
Product Liability Contingency [Line Items]
Product Warranty Rollforward
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance
Standard and Extended Product Warranty Accrual
Accruals
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued
Payments
Standard and Extended Product Warranty Accrual, Decrease for Payments
Adjustment to prior period accruals
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties
Foreign currency translation
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss)
Ending balance
Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]
Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]
Product Warranty Disclosure [Text Block]
Product Warranty Disclosure [Text Block]
Acquisition-related costs
Business Combination, Acquisition Related Costs
Severance costs
Severance Costs
Integration expenses
Business Combination, Integration Related Costs
Acquisition-related costs and integration expenses
Business Combination, Acquisition, Severance & Integration Related Costs
Business Combination, Acquisition, Severance & Integration Related Costs
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]
Segment Reporting Disclosure [Text Block]
Business Combination Disclosure [Text Block]
Business Combination Disclosure [Text Block]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]
Revenue from Contract with Customer [Text Block]
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]
Derivative Instruments, Gain (Loss) [Table Text Block]
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Asset and Liability [Table Text Block]
Contract with Customer, Asset and Liability [Table Text Block]
Pension and Other Postretirement Benefits Disclosure [Text Block]
Pension and Other Postretirement Benefits Disclosure [Text Block]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Subsegments [Axis]
Subsegments [Axis]
Subsegments [Domain]
Subsegments [Domain]
Subsegments Consolidation Items [Axis]
Subsegments Consolidation Items [Axis]
Subsegments Consolidation Items [Domain]
Subsegments Consolidation Items [Domain]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Total Segment Adjusted EBITDA
Segment Adjusted EBITDA
Segment Adjusted EBITDA is defined as earnings before interest, income taxes,
depreciation and amortization for our reportable segments, excluding the impact of restructuring and acquisition-related costs, debt refinancing and redemption costs and non-recurring items
Interest expense
Depreciation and amortization
Depreciation, Depletion and Amortization
Restructuring and acquisition-related costs
Gain on sale of business
Gain (Loss) on Sale of Capital Leases, Net
Gain (Loss) on Sale of Capital Leases, Net
Acquisition-related fair value inventory adjustment
Fair Value Inventory Adjustment from Acquisition of MPG
Fair Value Inventory Adjustment from Acquisition of MPG - Inventory in process written up to fair value in purchase accounting that was sold in the period. Cost of goods sold (inventory) artificially high due to fair value mark up.
Impact of change in accounting principle
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results
Debt refinancing and redemption costs
Write off of Deferred Debt Issuance Cost
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Accounts receivable, net
Receivables, Net, Current
Deferred revenue, current
Deferred Revenue, Current
Deferred revenue, noncurrent
Deferred Revenue, Noncurrent
Increase (decrease) in accounts receivable
Increase (Decrease) in Receivables
Contract liability, current, increase (decrease)
Contract Liability Increase (Decrease), Current
Contract Liability Increase (Decrease), Current
Contract liability, noncurrent, increase (decrease)
Contract Liabilities Increase (Decrease), Noncurrent, Net of Contract Liabilities Amortized into Revenue
Contract Liabilities Increase (Decrease), Noncurrent, Net of Contract Liabilities Amortized into Revenue
Contract liability, additions
Deferred Revenue, Additions
Contract with customer, liability, revenue recognized
Contract with Customer, Liability, Revenue Recognized
Document and Entity Information [Abstract]
Document and Entity Information [Abstract]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
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 Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Document Period End Date
Document Period End Date
Amendment Flag
Amendment Flag
Document Type
Document Type
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Current Reporting Status
Entity Current Reporting Status
Entity Voluntary Filers
Entity Voluntary Filers
Ownership [Axis]
Ownership [Axis]
Ownership [Domain]
Ownership [Domain]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Cash consideration
Share consideration
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
Total consideration transferred
Fair value of MPG noncontrolling interests
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value
Total fair value of MPG
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Cash acquired
Postretirement benefits and other long-term liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other
Statement of Comprehensive Income [Abstract]
Net income
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Defined benefit plans, net of tax (a)
Foreign currency translation adjustments
Changes in cash flow hedges, net of tax (b)
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive income attributable to AAM
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Schedule of Product Warranty Liability [Table Text Block]
Schedule of Product Warranty Liability [Table Text Block]
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales
Sales Revenue, Goods, Net, Inclusive of Intersegment Sales
Sales Revenue, Goods, Net, Intersegment Sales
Sales Revenue, Goods, Net, Intersegment Sales
Sales Revenue, Goods, Net, Intersegment Sales. Sales between operating segments.
Revenues
Total Segment Adjusted EBITDA
Secured Debt [Member]
Secured Debt [Member]
New Multi-Currency Credit Facility [Member]
New Multi-Currency Credit Facility [Member]
New Multi-Currency Credit Facility [Member]
Term Loan A & Term Loan B [Domain]
Term Loan A & Term Loan B [Domain]
Term Loan A & Term Loan B [Domain]
Long-term Line of Credit
Payment for Debt Extinguishment or Debt Prepayment Cost
Payment for Debt Extinguishment or Debt Prepayment Cost
Long-term Debt, Current Maturities
Long-term Debt, Current Maturities
Line of Credit Facility, Remaining Borrowing Capacity
Line of Credit Facility, Remaining Borrowing Capacity
Line of Credit Facility, Standby Letters of Credit Issued Against the Facility
Line of Credit Facility, Standby Letters of Credit Issued Against the Facility
The amount of total standby letters of credit issued against the revolving credit facility at the reporting date, which represents a reduction of the available borrowing capacity.
Fair Value Disclosures [Text Block]
Fair Value Disclosures [Text Block]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting, Policy [Policy Text Block]
Basis of Accounting, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Income Tax Disclosure [Abstract]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Foreign Tax Authority [Member]
Foreign Tax Authority [Member]
Effective income tax rate, continuing operations
Effective Income Tax Rate Reconciliation, Percent
Unrecognized tax benefit liability, including penalties and accrued interest
Unrecognized tax benefit liability, including penalties and accrued interest
Unrecognized tax benefit liability, including penalties and accrued interest
Change in Liability for Unrecognized Tax Benefits and Related Interest and Penalties
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Reconciliation of Total Segment Adjusted EBITDA to Income Before Income Taxes [Table Text Block]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Selling, General and Administrative Expenses [Member]
Selling, General and Administrative Expenses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Defined benefit plans, amounts reclassified from accumulated other comprehensive income (loss)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Foreign Credit Facilities [Member]
Foreign Line of Credit [Member]
Debt Instrument, Repurchase Amount
Debt Instrument, Repurchase Amount
Interest Paid, Including Capitalized Interest, Operating and Investing Activities
Interest Paid, Including Capitalized Interest, Operating and Investing Activities
Write off of Deferred Debt Issuance Cost
Redemption Premium
Redemption Premium
Debt refinancing and redemption costs
Debt Instrument, Tender Premiums
Gain (Loss) on Extinguishment of Debt, before Write off of Debt Issuance Cost
Debt Instrument, Unused Borrowing Capacity, Amount
Debt Instrument, Unused Borrowing Capacity, Amount
Long-term Debt, Weighted Average Interest Rate, at Point in Time
Long-term Debt, Weighted Average Interest Rate, at Point in Time
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and Intangible Assets Disclosure [Text Block]
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
2016 Restructuring Plan - Employee Severance [Member]
2016 Restructuring Plan - Employee Severance [Member]
2016 Restructuring Plan - Employee Severance [Member]
2016 Restructuring Plan - Other Restructuring [Member]
2016 Restructuring Plan - Other Restructuring [Member]
2016 Restructuring Plan - Other Restructuring [Member]
Employee Severance [Member]
Employee Severance [Member]
Other Restructuring [Member]
Other Restructuring [Member]
Facility Closing [Member]
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges
Restructuring Charges
Restructuring and Related Cost, Expected Cost Remaining
Restructuring and Related Cost, Expected Cost Remaining
Restructuring and Related Cost, Total Expected Cost to be Incurred Current Year
Restructuring and Related Cost, Total Expected Cost to be Incurred Current Year
Restructuring and Related Cost, Total Expected Cost to be Incurred in Current Year
Income Tax Disclosure [Text Block]
Income Tax Disclosure [Text Block]
Tranche [Axis]
Tranche [Axis]
Tranche
Class [Domain]
Class [Domain]
Class [Domain]
Total Debt Instruments excluding Revolving Credit Facility [Member]
Total Debt Instruments excluding Revolving Credit Facility [Member]
Total Debt Instruments excluding Revolving Credit Facility [Member]
Capital lease obligations
Capital Lease Obligations
Debt, Long-term and Short-term, Combined Amount
Debt, Long-term and Short-term, Combined Amount
Current portion of long-term debt
Long-term debt
Long-term Debt and Capital Lease Obligations
Unamortized Debt Issuance Expense
Unamortized Debt Issuance Expense
Long-term debt, net
Long-Term Debt, net of Issuance Costs
Long-Term Debt, net of Issuance Costs based on application of ASU 2015-03.
Long-term Debt [Text Block]
Long-term Debt [Text Block]
Supplemental Guarantor Condensed Consolidating Statements of Cash Flows [Abstract]
Supplemental Guarantor Condensed Consolidating Statements of Cash Flows [Abstract]
Consolidation, Eliminations [Member]
Consolidation, Eliminations [Member]
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
Holdings [Member]
Parent Company [Member]
AAM Inc. [Member]
Subsidiary Issuer [Member]
Guarantor Subsidiaries [Member]
Guarantor Subsidiaries [Member]
Non-Guarantor Subsidiaries [Member]
Non-Guarantor Subsidiaries [Member]
Cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Net cash provided by (used in) operating activities
Net Cash Provided by (Used in) Operating Activities
Investing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Proceeds from sale of property, plant and equipment
Proceeds from Sale of Property, Plant, and Equipment
Purchase buyouts of leased equipment
Payments to Acquire Equipment on Lease
Acquisition of business, net of cash acquired
Intercompany Activity - Investing
Intercompany Activity - Investing
The net cash inflow or outflow related to capital contributions or loans made to intercompany partners.
Proceeds from sale of business, net
Proceeds from Divestiture of Businesses, Net of Cash Divested
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Financing activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net debt activity
Proceeds from (Repayments of) Debt
Debt issuance costs
Payments of Debt Issuance Costs
Employee stock option exercises
Proceeds from Stock Options Exercised
Purchase of treasury stock
Payments for Repurchase of Common Stock
Purchase of noncontrolling interest
Payments to Noncontrolling Interests
Intercompany Activity - Financing
Intercompany Activity - Financing
Intercompany Activity - Financing
Net cash provided by (used in) financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of exchange rate changes on cash
Effect of Exchange Rate on Cash and Cash Equivalents
Net increase (decrease) in cash, cash equivalents and restricted cash
Cash and Cash Equivalents, Period Increase (Decrease)
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Fair Value, Financial Instruments not Carried at Fair Value [Table Text Block]
Fair Value, by Balance Sheet Grouping [Table Text Block]
Impairments of Long-Lived Assets Measured at Fair Value [Table Text Block]
Fair Value Measurements, Nonrecurring [Table Text Block]
Supplemental Guarantor Condensed Consolidating Statements of Income [Abstract]
Supplemental Guarantor Condensed Consolidating Statements of Income [Abstract]
Net sales
Revenues [Abstract]
Intercompany
Revenue from Related Parties
Nonoperating Income (Expense)
Nonoperating Income (Expense)
Income (loss) before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income tax expense (benefit)
Earnings from equity in subsidiaries
Income (Loss) from Equity Method Investments
Net income (loss) before royalties
Net Income (Loss) Before Royalties and Dividends
This element represents the income or loss from continuing operations attributable to the economic entity after income or loss from equity method investments and income taxes, but before royalties and dividends, extraordinary items and noncontrolling interest.
Royalties
Royalties and Dividends
Represents income (expense) from royalties and dividends during the period.
Net income after royalties
Net Income (loss) After Royalties and Dividends
This element represents the income or loss from continuing operations attributable to the economic entity after income or loss from equity method investments, income taxes and royalties and dividends, but before extraordinary items and noncontrolling interest.
Net income attributable to noncontrolling interests
Other comprehensive income, net of tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest
Schedule of Franchisor Disclosure [Table]
Schedule of Franchisor Disclosure [Table]
Franchisor Disclosure [Axis]
Franchisor Disclosure [Axis]
Franchisor Disclosure [Domain]
Franchisor Disclosure [Domain]
Franchisor Disclosure [Line Items]
Franchisor Disclosure [Line Items]
Entity Number of Employees
Entity Number of Employees
Number of Facilities
Number of Facilities
Number of Facilities
Number of Countries in which Entity Operates
Number of Countries in which Entity Operates
Divestiture of Business - Selling Price
Divestiture of Business - Selling Price
Divestiture of Business - Selling Price
Proceeds from Divestiture of Businesses
Proceeds from Divestiture of Businesses
Restricted Cash
Restricted Cash
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Pension Plan, Noncurrent
Liability, Defined Benefit Pension Plan, Noncurrent
Liability, Other Postretirement Defined Benefit Plan, Noncurrent
Liability, Other Postretirement Defined Benefit Plan, Noncurrent
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year
Schedule of Goodwill [Table Text Block]
Schedule of Goodwill [Table Text Block]
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Statement of Cash Flows [Abstract]
Debt refinancing, redemption costs and gain from settlement of capital lease [Member]
Debt refinancing, redemption costs and gain from settlement of capital lease [Member]
Debt refinancing, redemption costs and gain from settlement of capital lease [Member]
Operating activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Impairment of long-lived assets
Asset Impairment Charges
Deferred income taxes
Increase (Decrease) in Deferred Income Taxes
Stock-based compensation
Share-based Compensation
Pensions and other postretirement benefits, net of contributions
Pensions and other postretirement benefits, net of contributions
The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments), net of contributions made to defined benefit plans during the period.
Loss (Gain) on disposal of property, plant and equipment, net
Gain (Loss) on Disposition of Property Plant Equipment
Debt refinancing and redemption costs and (gain) on settlement of capital lease
(Gain) Loss on Extinguishment of Debt and Capital Lease Obligation
(Gain) Loss on Extinguishment of Debt and Capital Lease Obligation
Changes in operating assets and liabilities, net of amounts acquired or disposed
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Inventories
Increase (Decrease) in Inventories
Accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Deferred revenue
Deferred Revenue, Period Increase (Decrease)
Other assets and liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net cash provided by operating activities
Purchases of property, plant and equipment
Acquisition of business, net of cash acquired
Payments of long-term debt and capital lease obligations
Repayments of Long-term Debt
Proceeds from issuance of long-term debt
Net increase (decrease) in cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Cash, cash equivalents and restricted cash at beginning of period
Cash, cash equivalents and restricted cash at end of period
Supplemental cash flow information
Supplemental Cash Flow Information [Abstract]
Interest paid
Interest Paid, Excluding Capitalized Interest, Operating Activities
Income taxes paid, net of refunds
Income Taxes Paid, Net
Non-cash investing activities: AAM common shares issued for acquisition of MPG
Stock Issued During Period, Value, Acquisitions
Fair Value of Impaired Assets [Abstract]
Fair Value of Impaired Assets [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Member]
Other Assets and Deferred Charges [Member]
Other Assets and Deferred Charges [Member]
Other Assets and Deferred Charges [Member]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Impaired Long Lived Assets, Fair Value
Impaired Long Lived Assets, Fair Value
Impaired Long Lived Assets, Fair Value
Impairment of Long-Lived Assets to be Disposed of
Impairment of Long-Lived Assets to be Disposed of
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Designated as Hedging Instrument [Member]
Designated as Hedging Instrument [Member]
Not Designated as Hedging Instrument [Member]
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value, by Balance Sheet Location [Axis]
Prepaid expenses and other [Member]
Prepaid Expenses and Other Current Assets [Member]
Other Noncurrent Assets [Member]
Other Noncurrent Assets [Member]
Accrued expenses and other [Member]
Accrued Liabilities [Member]
Postretirement benefits and other long-term liabilities [Member]
Other Noncurrent Liabilities [Member]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Cash Equivalents, at Carrying Value
Other Cash Equivalents, at Carrying Value
Cash Equivalents, at Fair Value
Cash and Cash Equivalents, Fair Value Disclosure
Foreign Currency Contract, Asset, Fair Value Disclosure
Foreign Currency Contract, Asset, Fair Value Disclosure
Interest Rate Derivative Assets, at Fair Value
Interest Rate Derivative Assets, at Fair Value
Foreign Currency Contract, Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure
Interest Rate Derivative Liabilities, at Fair Value
Interest Rate Derivative Liabilities, at Fair Value
Supplemental Guarantor Consolidating Income Statement [Table Text Block]
Supplemental Guarantor Consolidating Income Statement [Table Text Block]
Tabular disclosure of the Condensed Consolidating Statement of Operations prepared under the equity method of accounting whereby the investments in subsidiaries are recorded at cost and adjusted for the parent's share of the subsidiaries' cumulative results of operations, capital contributions and distributions and other changes in equity. [Table Text Block]
Supplemental Guarantor Consolidating Balance Sheet [Table Text Block]
Supplemental Guarantor Consolidating Balance Sheet [Table Text Block]
Tabular disclosure of the Condensed Consolidating Statement of Financial Position prepared under the equity method of accounting whereby the investments in subsidiaries are recorded at cost and adjusted for the parent's share of the subsidiaries' cumulative results of operations, capital contributions and distributions and other changes in equity. [Table Text Block]
Supplemental Guarantor Consolidating Statement of Cash Flows [Table Text Block]
Supplemental Guarantor Consolidating Statement of Cash Flows [Table Text Block]
Tabular disclosure of the Condensed Consolidating Statement of Cash Flows prepared under the equity method of accounting whereby the investments in subsidiaries are recorded at cost and adjusted for the parent's share of the subsidiaries' cumulative results of operations, capital contributions and distributions and other changes in equity. [Table Text Block]
Derivative Instruments and Hedging Activities Disclosures [Table]
Derivative Instruments and Hedging Activities Disclosures [Table]
Debt [Member]
Debt [Member]
Foreign Currency Forward & Foreign Currency Option Contracts [Member]
Foreign Currency Forward & Foreign Currency Option Contracts [Member]
Foreign Currency Forward & Foreign Currency Option Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount
Derivative, Notional Amount
Derivative, Gain on Derivative
Derivative, Liquidation Proceeds, Monetary Amount
Derivative, Liquidation Proceeds, Monetary Amount
Derivative, Amount of Hedged Item, Through May 2019
Derivative, Amount of Hedged Item, Through May 2019
Derivative, Amount of Hedged Item, Through May 2019
Derivative, Amount of Hedged Item, Through May 2020
Derivative, Amount of Hedged Item, Through May 2020
Derivative, Amount of Hedged Item, Through May 2020
Derivative, Amount of Hedged Item, Through May 2021
Derivative, Amount of Hedged Item, Through May 2021
Derivative, Amount of Hedged Item, Through May 2021
Derivative, Amount of Hedged Item, Through May 2022
Derivative, Amount of Hedged Item, Through May 2022
Derivative, Amount of Hedged Item, Through May 2022
Derivative, Amount of Hedged Item, Through May 2023
Derivative, Amount of Hedged Item, Through May 2023
Derivative, Amount of Hedged Item, Through May 2023
Statement of Financial Position, Stock, Parenthetical [Abstract]
Root abstract to be used for parenthetical relating to common stock par value and amount of treasury shares reported within line items on the Statement of Financial Position.
Common stock, par or stated value per share
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized
Common Stock, Shares Authorized
Treasury stock, shares
Treasury Stock, Shares
Common stock, shares, issued
Common Stock, Shares, Issued
Supplemental Guarantor Condensed Consolidating Balance Sheets [Abstract]
Supplemental Guarantor Condensed Consolidating Balance Sheets [Abstract]
Assets
Assets [Abstract]
Current assets
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Intercompany receivables
Intercompany receivables
Intercompany receivables
Inventories, net
Prepaid expenses and other
Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, net
Property, Plant and Equipment, Net
Intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Intercompany notes and accounts receivable
Intercompany notes receivable
Intercompany notes receivable
Other assets and deferred charges
Other Assets, Noncurrent, Condensed
Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the condensed balance sheet that is included in the Supplemental Guarantor disclosure. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). In addition to the items included in Other Assets and Deferred Charges on the Consolidated Balance Sheet, for purposes of the Supplemental Guarantor disclsoure, this line item also includes Deferred Taxes, Noncurrent and the Noncurrent portion of the GM Postretirment Cost Sharing Asset.
Investment in subsidiaries
Equity Method Investments
Total assets
Assets
Liabilities and stockholders' equity
Liabilities and Equity [Abstract]
Current liabilities
Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Current
Intercompany payables
Intercompany payables
Intercompany payables
Accrued expenses and other
Other Liabilities, Current, Condensed
Aggregate carrying amount, as of the balance sheet date, of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately included in the Supplemental Guarantor disclosure. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). In addition to the items included in Other Accrued Expenses on the Consolidated Balance Sheet, for purposes of the Supplemental Guarantor disclsoure, this line item also includes Accrued Compensation and Benefits, Deferred Revenue and Deferred Taxes, Current.
Total current liabilities
Liabilities, Current
Intercompany notes and accounts payable
Intercompany Payable (Receivable)
This element represents the net payables/(receivables) arising from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's' management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.
Other long-term liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Stockholders' Equity Attributable to Parent
Stockholders' Equity Attributable to Parent
Noncontrolling interests in subsidiaries
Stockholders' Equity Attributable to Noncontrolling Interest
Total stockholders' equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Total liabilities and stockholders' equity
Liabilities and Equity
Schedule of Net Benefit (Credits) Costs [Table Text Block]
Schedule of Net Benefit Costs [Table Text Block]
Restructuring Reserve [Roll Forward]
Restructuring Reserve [Roll Forward]
Restructuring reserve
Restructuring Reserve
Charges
Cash utilization
Payments for Restructuring
Non-cash utilization
Restructuring Reserve, Settled without Cash
Restructuring reserve
Statement of Financial Position [Abstract]
Prepaid expenses and other
Prepaid Expense and Other Assets, Current
Deferred income taxes
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent
GM postretirement cost sharing asset
GM Postretirement Cost Sharing Asset, Noncurrent
Amounts estimated to be received from General Motors Company (GM), beyond one year of the balance sheet date, that relate to an agreement between us and GM to share proportionally in the cost of other postretirement employee benefits for eligible retirees based on the length of service an employee had with us and GM.
Other assets and deferred charges
Other Assets, Noncurrent
Liabilities and Stockholders’ Equity
Accrued compensation and benefits
Employee-related Liabilities, Current
Deferred revenue
Accrued expenses and other
Other Liabilities, Current
Deferred revenue
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Postretirement benefits and other long-term liabilities
Postretirement benefits and other longterm liabilities
This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans, as well as, the aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet due to materiality considerations. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).
Stockholders' equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, par value $0.01 per share; 150.0 million shares authorized; 118.8 million shares issued as of June 30, 2018 and 118.2 million shares issued as of December 31, 2017
Common Stock, Value, Outstanding
Paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Treasury stock at cost, 7.1 million shares as of June 30, 2018 and 6.9 million shares as of December 31, 2017
Treasury Stock, Value
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Defined benefit plans, net of tax
Foreign currency translation adjustments
Unrecognized income (loss) on cash flow hedges, net of tax
Total AAM stockholders' equity
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Earnings Per Share [Text Block]
Earnings Per Share [Text Block]
Other Comprehensive Income (Loss), Tax, Parenthetical Disclosures [Abstract]
Other comprehensive income (loss), pension and other postretirement benefit plans, tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax
Other comprehensive income (loss), derivatives qualifying as hedges, tax
Long-term Debt
Payments of Debt Issuance Costs