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Litigation (Details) - USD ($) $ in Millions | Nov. 03, 2016 | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016
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Loss Contingencies [Line Items] |  |  |  |
Potential liabilities related to litigation and environmental matters |  | $ 33.7 | $ 31.8 | $ 27.4
Litigation [Domain] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, damages awarded, value | $ 44.8 |  |  |

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