Pension and Postretirement Benefit Costs - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Defined Benefit Plan Disclosure [Line Items] | |||||
| Net periodic benefit credit, excluding service cost | $ (12.1) | $ (7.5) | $ (12.8) | $ (22.3) | |
| Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 5.50% | 5.50% | 5.15% | ||
| Defined Benefit Plan, Amortization of Gain (Loss) | $ 11.5 | ||||
| Defined benefit plan, remaining amortization period | 3 months | 3 months | |||
| Defined Benefit Plan, Net Mark-To-Market Adjustment on Actuarially Determined Liabilities | $ (3.3) | $ 0.0 | $ (3.3) | $ 0.0 | |
| Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment | (22.9) | ||||
| Pension Plan | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year | 2.0 | 2.0 | |||
| Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 0.7 | $ 1.3 | |||
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- Definition Defined Benefit Plan, Net Mark-To-Market Adjustment on Actuarially Determined Liabilities No definition available.
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- Definition Defined benefit plan, remaining amortization period No definition available.
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- Definition Amount of increase (decrease) in accumulated benefit obligation from change in existing term of defined benefit plan or initiation of new defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. 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 contributions received and expected to be received by defined benefit plan from employer in current fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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- Details
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