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Schedule of Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill [Line Items] |
Schedule of Goodwill [Table Text Block] | Goodwill The following table provides a reconciliation of changes in goodwill for the year ended December 31, 2018 and the year ended December 31, 2017:
| Driveline |  | Metal Forming |  | Powertrain |  | Casting |  | Consolidated
| (in millions)
Balance as of January 1, 2017 | $ | 130.1 |  |  | $ | 23.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 154.0 |
Acquisition of MPG | — |  |  | 515.3 |  |  | 471.6 |  |  | 405.5 |  |  | 1,392.4 |
Acquisition of USM Mexico | 80.4 |  |  | — |  |  | — |  |  | — |  |  | 80.4 |
Foreign currency translation | 0.6 |  |  | 19.7 |  |  | 7.2 |  |  | — |  |  | 27.5 |
Balance as of December 31, 2017 | $ | 211.1 |  |  | $ | 558.9 |  |  | $ | 478.8 |  |  | $ | 405.5 |  |  | $ | 1,654.3 |
Acquisition of MPG | — |  |  | 0.9 |  |  | — |  |  | — |  |  | 0.9 |
Acquisition of USM Mexico | 1.3 |  |  | — |  |  | — |  |  | — |  |  | 1.3 |
Impairment charge | — |  |  | — |  |  | (80.0 | ) |  | (405.5 | ) |  | (485.5 | )
Sale of business | — |  |  | — |  |  | (15.1 | ) |  | — |  |  | (15.1 | )
Foreign currency translation | (0.3 | ) |  | (7.4 | ) |  | (6.4 | ) |  | — |  |  | (14.1 | )
Balance as of December 31, 2018 | $ | 212.1 |  |  | $ | 552.4 |  |  | $ | 377.3 |  |  | $ | — |  |  | $ | 1,141.8 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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Namespace Prefix: | us-gaap_
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