Other Postretirement Benefit Plans (Details) - Postretirement Plan - 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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| Components of net periodic benefit credit: | ||||
| Service cost | $ 0.0 | $ 0.1 | $ 0.0 | $ 0.1 |
| Interest cost | 0.5 | 0.5 | 1.3 | 1.4 |
| Amortization of prior service credit | (2.1) | (2.1) | (6.2) | (6.2) |
| Net periodic benefit cost | $ (1.6) | $ (1.5) | $ (4.9) | $ (4.7) |
| X | ||||||||||
- 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 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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- References No definition available.
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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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