Retirement Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Defined Benefit Plan, Service Cost | $ 0.1 | $ 0.2 | $ 0.4 | $ 0.5 |
| Defined Benefit Plan, Interest Cost | 3.0 | 3.0 | 9.0 | 9.0 |
| Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (3.4) | (3.6) | (10.3) | (10.8) |
| Amortization of actuarial net loss | 0.5 | 0.6 | 1.4 | 1.7 |
| Defined Benefit Plan, Net Periodic Benefit Cost other than Service Cost | 0.1 | 0.0 | 0.1 | (0.1) |
| Net periodic benefit cost | 0.2 | 0.2 | 0.5 | 0.4 |
| Other comprehensive income (loss), pension income tax effects | $ (0.2) | $ (0.1) | $ (0.3) | $ (0.4) |
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- Definition Defined Benefit Plan, Net Periodic Benefit Cost other than Service Cost 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 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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- Definition Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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