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Commitments and Contingencies Expenses for asbestos- related litigation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Asbestos related litigation [Abstract] |  |  |  |
Liability for Asbestos and Environmental Claims, Net, Incurred Loss | $ 1.7 | $ 1.2 | $ 2.8 | $ (0.5)

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- Definition Asbestos related litigation [Abstract] + References No definition available. + Details
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- Definition Amount, after effects of reinsurance, of expense for claims incurred and costs incurred in the claim settlement process attributable to asbestos and environmental claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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