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Contingencies (Narrative) (Details) - Asbestos Issue [Member] $ in Millions | Sep. 30, 2020 USD ($) claims | Dec. 31, 2019 claims | Dec. 31, 2018 claims | Dec. 31, 2017 claims | Dec. 31, 2016 claims | Dec. 31, 2015 claims | Dec. 31, 2014 claims
--- | --- | --- | --- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of claims | 3,616 | 3,708 | 3,684 | 3,730 | 3,745 | 3,791 | 3,821
Total resolved claims, by means of settlement or dismissal | 37,930 |  |  |  |  |  |
Total cost of resolution | $ | $ 10.4 |  |  |  |  |  |
Confirmed insurance coverage | $ | $ 140.0 |  |  |  |  |  |
Resolution costs paid by insurance carrier | 100.00% |  |  |  |  |  |
Brandon Drying Fabrics, Inc. [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Total resolved claims, by means of settlement or dismissal | 7,710 |  |  |  |  |  |
Resolution costs paid by insurance carrier | 100.00% |  |  |  |  |  |

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