v3.7.0.1

Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract] |
Carrying value of goodwill by segment | The carrying values of goodwill by segment throughout fiscal years ended December 31, 2016 and 2015 were as follows:
|  | HHI Segment |  |  | Metaldyne Segment |  |  | Grede Segment |  |  | Total |
|  | (In millions) |
Balance December 31, 2013 |  | $ | 309.4 |  |  |  | 348.5 |  |  |  | — |  |  |  | 657.9 |
Goodwill resulting from Grede Transaction |  |  | — |  |  |  | — |  |  |  | 261.6 |  |  |  | 261.6 |
Impairment |  |  | (11.8 | ) |  |  | — |  |  |  | — |  |  |  | (11.8 | )
Balance December 31, 2014 |  |  | 297.6 |  |  |  | 348.5 |  |  |  | 261.6 |  |  |  | 907.7 |
Balance December 31, 2015 |  |  | 297.6 |  |  |  | 348.5 |  |  |  | 261.6 |  |  |  | 907.7 |
Balance December 31, 2016 |  | $ | 297.6 |  |  |  | 348.5 |  |  |  | 261.6 |  |  |  | 907.7 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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