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Employee Benefit Plans | 6 Months Ended
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Jun. 30, 2012
Employee Benefit Plans [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | EMPLOYEE BENEFIT PLANS The components of net periodic benefit cost (credit) are as follows:
|  | Pension Benefits
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2012 |  | 2011 |  | 2012 |  | 2011
|  | (in millions)
Service cost |  | $ | 0.8 |  |  | $ | 1.1 |  |  | $ | 1.6 |  |  | $ | 2.2 |
Interest cost |  | 8.8 |  |  | 9.2 |  |  | 17.6 |  |  | 18.4 |
Expected asset return |  | (8.0 | ) |  | (7.9 | ) |  | (16.0 | ) |  | (15.8 | )
Amortized loss |  | 1.8 |  |  | 1.1 |  |  | 3.6 |  |  | 2.2 |
Net periodic benefit cost |  | $ | 3.4 |  |  | $ | 3.5 |  |  | $ | 6.8 |  |  | $ | 7.0 |
|  | Other Postretirement Benefits
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2012 |  | 2011 |  | 2012 |  | 2011
|  | (in millions)
Service cost |  | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | 0.2 |  |  | $ | 0.4 |
Interest cost |  | 3.9 |  |  | 4.3 |  |  | 7.8 |  |  | 8.6 |
Amortized loss |  | 0.2 |  |  | 0.1 |  |  | 0.4 |  |  | 0.2 |
Amortized prior service credit |  | (0.5 | ) |  | (0.8 | ) |  | (1.0 | ) |  | (1.6 | )
Curtailment |  | — |  |  | — |  |  | (21.8 | ) |  | — |
Settlement |  | (5.2 | ) |  | — |  |  | (5.2 | ) |  | — |
Net periodic benefit cost (credit) |  | $ | (1.5 | ) |  | $ | 3.8 |  |  | $ | (19.6 | ) |  | $ | 7.6 |
In the first quarter of 2012, we recorded a gain of $21.8 million in cost of goods sold for the curtailment of certain other postretirement benefits (OPEB). This resulted primarily from the reduction in the expected future OPEB related to the DMC and CKMF hourly associates who have terminated employment from AAM as a result of our plant closures. These curtailment gains resulted in an increase in our accumulated other comprehensive loss of $21.8 million. In the second quarter of 2012, we notified hourly associates of the termination of a benefit plan, which provided legal services to certain eligible hourly associates represented by the International UAW. As a result of terminating this plan, we recorded a settlement gain of $5.2 million in cost of goods sold in the second quarter of 2012. Recognition of this settlement gain reduced our postretirement benefits and other long-term liabilities by $4.7 million and also reduced our accumulated other comprehensive loss by $0.5 million. Our regulatory pension funding requirements in 2012 are approximately $35 million. This funding requirement does not include any potential funding relief provided by the July 2012 enactment of the Moving Ahead for Progress in the 21st Century Act (MAP-21), or any additional regulatory funding required as a result of the closure of our Detroit Manufacturing Complex and Cheektowaga Manufacturing Facility. We expect our cash outlay for other postretirement benefit obligations in 2012, net of GM cost sharing, to be approximately $16 million.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph q -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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