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Commitments and Contingencies Asbestos Narrative (Details) - Asbestos [Member] | 3 Months Ended | 6 Months Ended | 12 Months Ended | 30 Months Ended | 351 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) claimants cases | Jun. 30, 2020 USD ($) claimants cases | Dec. 31, 2018 USD ($) claimants | Jun. 30, 2020 USD ($) claimants cases | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) claimants
Loss Contingencies [Line Items] |  |  |  |  |  |
Liabilities Subject to Compromise, Asbestos Obligations | $ 30,300,000 | $ 30,300,000 |  | $ 30,300,000 |  |
Loss Contingency, Pending Cases, Number | cases | 352 | 352 |  | 352 |  |
Loss Contingency, Pending Claims, Number | claimants | 4,732 | 4,732 | 4,820 | 4,732 |  | 4,759
Total settlement costs |  |  |  |  | $ 9,800,000 |
Loss Contingency, New Claims Filed, Number | claimants |  | 110 | 143 |  |  |
Percentage of settlement and defense costs covered by insurance |  |  |  |  | 40.00% |
Legal Fees |  | $ 1,090,000 | $ 2,250,000 |  |  |
Minimum [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Liabilities Subject to Compromise, Asbestos Obligations |  |  |  |  |  | $ 31,500,000
Loss Contingency, New Claims Filed, Number | claimants |  |  |  | 143 |  |
Legal Fees |  |  |  | $ 2,200,000 |  |
Maximum [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Liabilities Subject to Compromise, Asbestos Obligations |  |  |  |  |  | $ 43,300,000
Loss Contingency, New Claims Filed, Number | claimants |  |  |  | 173 |  |
Legal Fees |  |  |  | $ 2,300,000 |  |
Compensatory Only Damages [Member] | Pending Litigation [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of pending claims seeking specific amounts of damages | claimants | 55 | 55 |  | 55 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Impact of change in accounting principle | $ 23,400,000 |  |  |  |  |

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