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Document and Entity Information Document (USD $)
 9 Months Ended
Sep. 30, 2012
Oct. 24, 2012
Jun. 30, 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 Q3    
Document Period End Date Sep. 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