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Income Taxes Noncurrent Deferred Tax Assets and Liabilities Recognized in the Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets (liabilities), net, noncurrent	$ 359.7us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent	$ 332.0us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent
Domestic [Member]
Deferred tax assets (liabilities), net, noncurrent	362.2us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent / us-gaap_StatementGeographicalAxis = axl_DomesticMember	337.2us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent / us-gaap_StatementGeographicalAxis = axl_DomesticMember
Foreign [Member]
Deferred tax assets (liabilities), net, noncurrent	$ (2.5)us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent / us-gaap_StatementGeographicalAxis = axl_ForeignMember	$ (5.2)us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent / us-gaap_StatementGeographicalAxis = axl_ForeignMember

X

- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed after one year (or the normal operating cycle, if longer).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31917-109318



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318

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