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Commitments and Contingencies - Asbestos Narrative (Details) $ in Millions | 3 Months Ended | 315 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2017 claimants cases | Mar. 31, 2017 USD ($) claimants cases | Dec. 31, 2016 claimants | Dec. 31, 2015 claimants
Minimum [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimated Time until Primary Insurance is Exhausted | 6 months |  |  |
Maximum [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimated Time until Primary Insurance is Exhausted | 18 months |  |  |
Asbestos [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Pending Claims, Number |  |  | 5,339 | 6,242
Total settlement costs | $ |  | $ 8.4 |  |
Percentage of settlement and defense costs covered by insurance |  | 40.00% |  |
Asbestos [Member] | Pending Litigation [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Pending Claims, Number | cases | 629 | 629 |  |
Number of pending claims | 5,310 |  |  |
Punitive Only Damages [Member] | Asbestos [Member] | Pending Litigation [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of pending claims seeking specific amounts of damages | 0 | 0 |  |
Compensatory Only Damages [Member] | Asbestos [Member] | Pending Litigation [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of pending claims seeking specific amounts of damages | 60 | 60 |  |

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