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Document and Entity Information Document (USD $)
 12 Months Ended
Dec. 31, 2014
Feb. 19, 2015
Jun. 30, 2014
Document Information [Line Items]      
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 2014    
Document Fiscal Period Focus FY    
Document Period End Date Dec. 31, 2014    
Amendment Flag false    
Document Type 10-K    
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 1,426,087,818dei_EntityPublicFloat
Entity Common Stock, Shares Outstanding   75,761,739dei_EntityCommonStockSharesOutstanding  
Entity Current Reporting Status Yes    
Entity Voluntary Filers No