Pension And Other Postretirement Benefits (Components Of The Plans' Net Periodic Benefits Cost) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Pension Plan | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service Cost | $ 4.9 | $ 5.5 | $ 9.8 | $ 10.9 |
| Interest cost | 16.0 | 16.3 | 32.0 | 32.6 |
| Expected return on assets | (23.1) | (23.8) | (46.2) | (47.6) |
| Amortization of prior service credit | 0.0 | 0.0 | 0.0 | 0.0 |
| Recognized actuarial loss | 6.4 | 7.2 | 12.8 | 14.4 |
| Total Net Periodic Benefits Cost | 4.2 | 5.2 | 8.4 | 10.3 |
| Other Postretirement Benefit Plan | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service Cost | 1.0 | 1.3 | 2.0 | 2.6 |
| Interest cost | 5.6 | 5.5 | 11.2 | 10.9 |
| Expected return on assets | (4.2) | (4.0) | (8.4) | (8.0) |
| Amortization of prior service credit | (0.4) | (0.4) | (0.8) | (0.8) |
| Recognized actuarial loss | 0.4 | 0.8 | 0.8 | 1.6 |
| Total Net Periodic Benefits Cost | $ 2.4 | $ 3.2 | $ 4.8 | $ 6.3 |
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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. No definition available.
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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/exampleRef
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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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