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Pension and Other Post-retirement Benefits Accumulated Benefit Obligations (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Asset Retirement Obligation Disclosure [Abstract] |  |
Defined Benefit Plan, Accumulated Benefit Obligation | $ 617.5 | $ 623.1

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- References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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