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Commitments and Contingencies Purchase Obligations (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-term Purchase Commitment [Line Items]
Purchase Commitments	$ 127.5	$ 94.4

X

- Definition

Represents the amount of obligated purchase commitments for capital expenditures and related project expenses as of the reporting date.

+ References

No definition available.

+ Details

Name:	axl_PurchaseCommitments
Namespace Prefix:	axl_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration