Pension and Postretirement Benefit Plans (Net Pension And Postretirement Cost) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Pension benefits | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 1.5 | $ 2.0 | $ 4.5 | $ 5.7 |
| Interest cost | 6.6 | 7.0 | 19.8 | 20.3 |
| Expected return on plan assets | (7.5) | (6.7) | (22.4) | (19.5) |
| Amortization of net actuarial losses | 2.3 | 2.3 | 6.8 | 6.7 |
| Amortization of prior service cost | 0.5 | 0.4 | 1.3 | 1.2 |
| Net periodic cost | 3.4 | 5.0 | 10.0 | 14.4 |
| Postretirement benefits | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 0.0 | 0.0 | 0.1 | 0.0 |
| Interest cost | 0.4 | 0.4 | 1.3 | 1.1 |
| Amortization of net actuarial losses | 0.0 | 0.0 | 0.0 | (0.1) |
| Amortization of prior service cost | 0.0 | 0.1 | 0.2 | 0.3 |
| Net periodic cost | $ 0.4 | $ 0.5 | $ 1.6 | $ 1.3 |
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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 expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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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- Details
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