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Investment in Joint Ventures	9 Months Ended
	Sep. 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.

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The entire disclosure regarding an entity's investment in joint ventures. [Text Block]

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