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Investment in Joint Ventures (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Feb. 29, 2012
Payments to acquire interest in joint venture	$ 4.0
Investment in joint ventures, ownership percentage formerly held by joint venture partner		33.00%

X

- Definition

Represents the ownership percentage of e-AAM held by SAAB prior to the buyout of SAAB's shares by AAM during the period.

+ References

No definition available.

+ Details

Name:	axl_InvestmentInJointVenturesOwnershipPercentageFormerlyHeldByJointVenturePartner
Namespace Prefix:	axl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 17

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration