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Commitments and Contingencies Metaldyne Corporation (Details) $ in Millions | Dec. 31, 2017 USD ($)
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Loss Contingencies [Line Items] |
Loss Contingency, Estimate of Possible Loss | $ 8.0
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 2.4
Maximum [Member] |
Loss Contingencies [Line Items] |
Loss Contingency, Estimate of Possible Loss | $ 10.4

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