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Restructuring and Acquisition-Related Costs (Tables) | 9 Months Ended
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Sep. 30, 2017
Restructuring and Related Activities [Abstract] |
Restructuring and Related Costs [Table Text Block] | In the fourth quarter of 2016, AAM initiated actions under a global restructuring program focused on creating a more streamlined organization in addition to reducing our cost structure and preparing for acquisition integration activities. A summary of this activity for the first nine months of 2017 is shown below:
| Severance Charges |  | Implementation Costs |  | Total
| (in millions)
Accrual as of December 31, 2016 | $ | 0.6 |  |  | $ | 9.2 |  |  | $ | 9.8 |
Charges | 1.7 |  |  | 13.5 |  |  | 15.2 |
Cash utilization | (2.3 | ) |  | (17.8 | ) |  | (20.1 | )
Non-cash utilization | — |  |  | — |  |  | — |
Accrual adjustments | — |  |  | — |  |  | — |
Accrual as of September 30, 2017 | $ | — |  |  | $ | 4.9 |  |  | $ | 4.9 |
Business Combination, Separately Recognized Transactions [Table Text Block] | On March 1, 2017, we completed the acquisition of USM Mexico Manufacturing LLC (USM Mexico) and on April 6, 2017, we completed the acquisition of MPG. During the nine months ended September 30, 2017, we incurred the following charges related to these acquisitions:
| Acquisition-Related Costs |  | Severance Charges |  | Integration Expenses |  | Total
| (in millions)
Charges | $ | 40.7 |  |  | $ | 5.6 |  |  | $ | 29.0 |  |  | $ | 75.3 |
Total restructuring and acquisition-related charges | $ | 90.5 |

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- Definition Tabular disclosure of transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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