Postretirement Benefits Other Than Pensions - Components Of Comprehensive OPEB (Income) Expense (Details) - Other Postretirement Benefit Plan, Defined Benefit - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Service Cost Earned During the Year | $ 0.1 | $ 0.1 | $ 0.1 |
| Interest Cost on Accumulated Postretirement Benefit Obligation | 0.3 | 0.3 | 0.4 |
| Amortization of Prior Service Credit | (0.5) | (1.3) | (1.3) |
| Amortization of Accumulated Unrecognized OPEB Gain | (1.6) | (1.5) | (1.8) |
| Pension (Income) Expense Recognized in Consolidated Statements of Income (Loss) | (1.7) | (2.4) | (2.6) |
| Unrecognized OPEB Gain Arising During the Year | (0.2) | (1.0) | (0.1) |
| Prior Service Cost Arising During the Year | 0.5 | 1.3 | 1.3 |
| Amortization of Accumulated Unrecognized OPEB Gain | 1.6 | 1.5 | 1.8 |
| Comprehensive OPEB Expense (Income) | $ 0.2 | $ (0.6) | $ 0.4 |
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- Definition Defined Benefit Plan, Comprehensive Other Postretirement Employment Benefit Expense (Income) No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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