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Document and Entity Information Document (USD $)
 6 Months Ended
Jun. 30, 2012
Jul. 25, 2012
Entity Registrant Name AMERICAN AXLE & MANUFACTURING HOLDINGS INC  
Entity Central Index Key 0001062231  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q2  
Document Period End Date Jun. 30, 2012  
Amendment Flag false  
Document Type 10-Q  
Entity Well-known Seasoned Issuer Yes  
Entity Public Float $ 718,696,062  
Entity Common Stock, Shares Outstanding   74,839,567
Entity Current Reporting Status Yes  
Entity Voluntary Filers No