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Investment in Joint Ventures	6 Months Ended
Investment in Joint Ventures	Jun. 30, 2012
Investment in Joint Ventures [Abstract]
Investment in Joint Ventures [Text Block]	11. INVESTMENT IN JOINT VENTURES In the first quarter of 2012, we paid $4.0 million to acquire the remaining shares of e-AAM Driveline Systems AB (e-AAM). e-AAM, previously a joint venture between AAM and Saab Automobile AB (Saab), was created to design and commercialize electric all-wheel-drive (eAWD) systems designed to improve fuel efficiency, reduce CO₂ emissions and provide all-wheel-drive capability. Under the purchase agreement, Saab's bankruptcy estate sold its minority ownership (33% of the shares) in the joint venture to AAM. e-AAM is now a wholly-owned subsidiary of AAM and continues to be a fully consolidated entity. As a result, AAM has 100% ownership and control of the business operation and will continue the full scope of engineering, developing and commercializing eAWD hybrid driveline systems for passenger cars and crossover vehicles.