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Litigation Employee Benefit Plans Components of Net Periodic Benefit Cost (Credit) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2012 | Sep. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Pension and OPEB, Period Expense, Other | $ 28.1 | $ 28.7

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- Definition Represents pension and other postretirement benefits expense recorded to cost of goods sold as a result of our election to apply the provisions of Moving Ahead for Progress in the 21st Century Act (MAP-21) and other actions taken by us. + References No definition available. + Details
Name: | axl_PensionAndOpebPeriodExpenseOther
Namespace Prefix: | axl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration