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Commitments and Contingencies (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) claims | Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items] |  |  |
Number of claims dismissed | claims |  | 143 |
Number of claims settled (claim) | claims |  | 20 |
Claims settlements amount |  | $ 5.9 |
Asbestos-related claims | $ 75.2 | $ 75.2 | $ 76.2
Recorded third-party environmental recoveries receivable |  |  | $ 69.2
Primary coverage period |  | 8 years |
Excess coverage period |  | 2 years |
Indemnity and defense costs | 0.5 | $ 1.0 |
Connecticut Voluntary Corrective Action Program |  |  |
Loss Contingencies [Line Items] |  |  |
Environmental remediation expense |  | 0.7 |
Estimated total cleanup costs, accrual | 1.7 | 1.7 |
PCB Contamination Proceedings |  |  |
Loss Contingencies [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 0.2 | $ 0.2 |

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