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Retirement Plans and Post Retirement Benefits Defined Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2016
Retirement Benefits [Abstract] |  |
Maximum benefit amortization period | 20 years |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment | $ 3.1 | $ 0.1
Approximate percentage of assets represented by most significant plans | 81.00% |
Approximate percentage of benefit obligations represented by most significant plans | 83.00% |
Rate of eligible compensation increase | 4.00% |

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- Definition Defined Benefit Plan, Maximum Amortization Period + References No definition available. + Details
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- Definition Defined Benefit Plan, Significant Plans, Approximate Percentage of Beneift Obligation Accounted for + References No definition available. + Details
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- Definition Defined Benefit Plan, Significant Plans, Approximate Percentage of Plan Assets Accounted for + References No definition available. + Details
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- Definition Defined Benefit Plan, Significant Plans, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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