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Segment and Geographic Information Segment and Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 939.5us-gaap_SalesRevenueGoodsNet	$ 950.8us-gaap_SalesRevenueGoodsNet	$ 946.9us-gaap_SalesRevenueGoodsNet	$ 858.8us-gaap_SalesRevenueGoodsNet	$ 831.3us-gaap_SalesRevenueGoodsNet	$ 820.8us-gaap_SalesRevenueGoodsNet	$ 799.6us-gaap_SalesRevenueGoodsNet	$ 755.6us-gaap_SalesRevenueGoodsNet	$ 3,696.0us-gaap_SalesRevenueGoodsNet	$ 3,207.3us-gaap_SalesRevenueGoodsNet	$ 2,930.9us-gaap_SalesRevenueGoodsNet
Long-lived assets	1,750.9us-gaap_NoncurrentAssets				1,689.4us-gaap_NoncurrentAssets				1,750.9us-gaap_NoncurrentAssets	1,689.4us-gaap_NoncurrentAssets	1,627.8us-gaap_NoncurrentAssets
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									2,073.6us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_US	1,682.0us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_US	1,576.6us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_US
Long-lived assets	885.9us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US				850.0us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US				885.9us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US	850.0us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US	865.3us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									64.6us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_CA	74.4us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_CA	75.0us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_CA
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,055.5us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_MX	865.6us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_MX	755.1us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = country_MX
Long-lived assets	513.2us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_MX				469.3us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_MX				513.2us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_MX	469.3us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_MX	417.7us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_MX
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									156.5us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember	201.1us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember	216.4us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember
Long-lived assets	80.5us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember				100.2us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember				80.5us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember	100.2us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember	113.3us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									238.6us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember	255.2us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember	214.5us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Long-lived assets	177.3us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember				176.7us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember				177.3us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember	176.7us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember	159.0us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Europe and other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									107.2us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = axl_SegmentGeographicalOtherMember	129.0us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = axl_SegmentGeographicalOtherMember	93.3us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = axl_SegmentGeographicalOtherMember
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 94.0us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember				$ 93.2us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember				$ 94.0us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember	$ 93.2us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember	$ 72.5us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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