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Earnings Per Share Antidilutive Shares (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	0.5us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2.0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3.3us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Earnings per share, range of exercise prices of stock options excluded from the calculation of diluted EPS, lower end of range	$ 19.54axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsLowerEndOfRange	$ 19.54axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsLowerEndOfRange	$ 15.58axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsLowerEndOfRange
Earnings per share, range of exercise prices of stock options excluded from the calculation of diluted EPS, upper end of range	$ 26.65axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsUpperEndOfRange	$ 40.83axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsUpperEndOfRange	$ 40.83axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsUpperEndOfRange

X

- Definition

Represents the lower end of the range of exercise prices of stock options excluded from the calculation of diluted EPS during the period because the exercise price of these stock options was greater than the average annual market price of our stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	axl_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the upper end of the range of exercise prices of stock options excluded from the calculation of diluted EPS during the period because the exercise price of these stock options was greater than the average annual market price of our stock.

+ References

No definition available.

+ Details

Name:	axl_EarningsPerShareRangeOfExercisePricesOfStockOptionsExcludedFromCalculationOfDilutedEpsUpperEndOfRange
Namespace Prefix:	axl_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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