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Stock Based Compensation Performance Awards (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Stock-based Compensation [Abstract] |  |  |
Performance awards, liability at period end | $ 3.7 axl_PerformanceAwardsLiabilityAtPeriodEnd |  |
Allocated Share-based Compensation Expense, Net of Tax | $ 1.4 us-gaap_AllocatedShareBasedCompensationExpense | $ 7.9 us-gaap_AllocatedShareBasedCompensationExpense | $ 3.0 us-gaap_AllocatedShareBasedCompensationExpense

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- Definition Represents the liability recognized in the Balance Sheet at period end associated with Performance Awards outstanding that were granted under either the AAM 2009 Long-term Incentive Plan or the 2012 AAM Omnibus Incentive Plan. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | axl_StockbasedCompensationAbstract
Namespace Prefix: | axl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration