This element represents the income or loss from continuing operations attributable to the economic entity after income or loss from equity method investments, income taxes and royalties and dividends, but before extraordinary items and noncontrolling interest.

No definition available.

Supplemental Guarantor Condensed Consolidating Financial Statements 2012 and 2011 Income Statements (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net sales
External									$ 3,207.3	$ 2,930.9	$ 2,585.0
Intercompany									0	0	0
Total net sales	831.3	820.8	799.6	755.6	736.7	702.9	739.8	751.5	3,207.3	2,930.9	2,585.0
Cost of goods sold									2,728.6	2,531.2	2,129.9
Gross profit	126.9	125.3	122.2	104.3	84.0	90.7	85.8	139.2	478.7	399.7	455.1
Selling, general and administrative expenses									238.4	243.3	231.7
Operating income									240.3	156.4	223.4
Non-operating income (expense), net									(154.0)	(124.9)	(85.3)
Income (loss) before income taxes									86.3	31.5	138.1
Income tax expense (benefit)									(8.2)	(335.2)	1.0
Earnings (loss) from equity in subsidiaries									0	0	0
Net income (loss) before royalties and dividends									94.5	366.7	137.1
Royalties and dividends									0	0	0
Net income (loss) after royalties and dividends									94.5	366.7	137.1
Net loss attributable to noncontrolling interests									0	1.0	5.7
Net income attributable to AAM	29.8	31.6	25.8	7.3	319.9	(8.1)	4.7	51.2	94.5	367.7	142.8
Other comprehensive income (loss), net of tax									48.4	(60.5)	(97.6)
Foreign currency translation adjustments attributable to noncontrolling interests									0	0.3	0.2
Comprehensive income attributable to AAM									142.9	306.9	45.0
Holdings [Member]
Net sales
External									0	0	0
Intercompany									0	0	0
Total net sales									0	0	0
Cost of goods sold									0	0	0
Gross profit									0	0	0
Selling, general and administrative expenses									0	0	0
Operating income									0	0	0
Non-operating income (expense), net									0	0	0
Income (loss) before income taxes									0	0	0
Income tax expense (benefit)									0	0	0
Earnings (loss) from equity in subsidiaries									94.5	367.7	142.8
Net income (loss) before royalties and dividends									94.5	367.7	142.8
Royalties and dividends									0	0	0
Net income (loss) after royalties and dividends									94.5	367.7	142.8
Net loss attributable to noncontrolling interests									0	0	0
Net income attributable to AAM									94.5	367.7	142.8
Other comprehensive income (loss), net of tax									48.4	(60.5)	(97.6)
Foreign currency translation adjustments attributable to noncontrolling interests										0.3	0.2
Comprehensive income attributable to AAM									142.9	306.9	45.0
AAM Inc. [Member]
Net sales
External									773.6	704.8	777.7
Intercompany									15.3	18.6	25.1
Total net sales									788.9	723.4	802.8
Cost of goods sold									769.4	709.8	727.0
Gross profit									19.5	13.6	75.8
Selling, general and administrative expenses									182.4	186.5	192.0
Operating income									(162.9)	(172.9)	(116.2)
Non-operating income (expense), net									(155.1)	(135.2)	(91.8)
Income (loss) before income taxes									(318.0)	(308.1)	(208.0)
Income tax expense (benefit)									(24.9)	(343.9)	(5.2)
Earnings (loss) from equity in subsidiaries									167.0	79.0	165.5
Net income (loss) before royalties and dividends									(126.1)	114.8	(37.3)
Royalties and dividends									220.6	252.9	180.1
Net income (loss) after royalties and dividends									94.5	367.7	142.8
Net loss attributable to noncontrolling interests									0	0	0
Net income attributable to AAM									94.5	367.7	142.8
Other comprehensive income (loss), net of tax									48.4	(60.5)	(97.6)
Foreign currency translation adjustments attributable to noncontrolling interests										0.3	0.2
Comprehensive income attributable to AAM									142.9	306.9	45.0
Guarantor Subsidiaries of Certain Notes [Member]
Net sales
External									226.0	214.4	195.3
Intercompany									226.1	226.8	189.8
Total net sales									452.1	441.2	385.1
Cost of goods sold									389.0	389.8	334.2
Gross profit									63.1	51.4	50.9
Selling, general and administrative expenses									0.1	0	0
Operating income									63.0	51.4	50.9
Non-operating income (expense), net									10.7	(2.2)	1.0
Income (loss) before income taxes									73.7	49.2	51.9
Income tax expense (benefit)									0.9	(5.5)	1.2
Earnings (loss) from equity in subsidiaries									(21.7)	(49.2)	(37.7)
Net income (loss) before royalties and dividends									51.1	5.5	13.0
Royalties and dividends									0	0	0
Net income (loss) after royalties and dividends									51.1	5.5	13.0
Net loss attributable to noncontrolling interests									0	0	0
Net income attributable to AAM									51.1	5.5	13.0
Other comprehensive income (loss), net of tax									(7.2)	(10.1)	(29.0)
Foreign currency translation adjustments attributable to noncontrolling interests										0	0
Comprehensive income attributable to AAM									43.9	(4.6)	(16.0)
Non-Guarantor Subsidiaries [Member]
Net sales
External									2,207.7	2,011.7	1,612.0
Intercompany									14.0	25.2	12.7
Total net sales									2,221.7	2,036.9	1,624.7
Cost of goods sold									1,825.6	1,702.2	1,296.3
Gross profit									396.1	334.7	328.4
Selling, general and administrative expenses									55.9	56.8	39.7
Operating income									340.2	277.9	288.7
Non-operating income (expense), net									(9.6)	12.5	5.5
Income (loss) before income taxes									330.6	290.4	294.2
Income tax expense (benefit)									15.8	14.2	5.0
Earnings (loss) from equity in subsidiaries									0	0	0
Net income (loss) before royalties and dividends									314.8	276.2	289.2
Royalties and dividends									(220.6)	(252.9)	(180.1)
Net income (loss) after royalties and dividends									94.2	23.3	109.1
Net loss attributable to noncontrolling interests									0	1.0	5.7
Net income attributable to AAM									94.2	24.3	114.8
Other comprehensive income (loss), net of tax									(10.8)	(3.6)	(35.6)
Foreign currency translation adjustments attributable to noncontrolling interests										0.3	0.2
Comprehensive income attributable to AAM									83.4	20.4	79.0
Consolidation, Eliminations [Member]
Net sales
External									0	0	0
Intercompany									(255.4)	(270.6)	(227.6)
Total net sales									(255.4)	(270.6)	(227.6)
Cost of goods sold									(255.4)	(270.6)	(227.6)
Gross profit									0	0	0
Selling, general and administrative expenses									0	0	0
Operating income									0	0	0
Non-operating income (expense), net									0	0	0
Income (loss) before income taxes									0	0	0
Income tax expense (benefit)									0	0	0
Earnings (loss) from equity in subsidiaries									(239.8)	(397.5)	(270.6)
Net income (loss) before royalties and dividends									(239.8)	(397.5)	(270.6)
Royalties and dividends									0	0	0
Net income (loss) after royalties and dividends									(239.8)	(397.5)	(270.6)
Net loss attributable to noncontrolling interests									0	0	0
Net income attributable to AAM									(239.8)	(397.5)	(270.6)
Other comprehensive income (loss), net of tax									(30.4)	74.2	162.2
Foreign currency translation adjustments attributable to noncontrolling interests										(0.6)	(0.4)
Comprehensive income attributable to AAM									$ (270.2)	$ (322.7)	$ (108.0)