XML 16 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Feb. 09, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-14303    
Entity Registrant Name AMERICAN AXLE & MANUFACTURING HOLDINGS, INC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 38-3161171    
Entity Address, Address Line One One Dauch Drive    
Entity Address, City or Town Detroit    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 48211-1198    
City Area Code 313    
Local Phone Number 758-2000    
Title of 12(b) Security Common Stock, Par Value $0.01 Per Share    
Trading Symbol AXL    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 850.4
Entity Common Stock, Shares Outstanding   113,295,610  
Documents Incorporated by Reference Portions of the registrant's Annual Report to Stockholders for the year ended December 31, 2020 and Proxy Statement for use in connection with its Annual Meeting of Stockholders to be held on May 6, 2021, to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after December 31, 2020, are incorporated by reference in Part I (Items 1, 1A, 1B, 2, 3 and 4), Part II (Items 5, 6, 7, 7A, 8, 9, 9A and 9B), Part III (Items 10, 11, 12, 13 and 14) and Part IV (Item 15) of this Report.    
Entity Central Index Key 0001062231    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false