Retirement Plans (Schedule of Net Periodic Pension and Postretirement Benefit (Credit) 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, Net Periodic Benefit Cost (Credit) [Abstract] | ||||
| Service cost | $ 0.6 | $ 0.7 | $ 1.6 | $ 1.9 |
| Interest cost | 4.5 | 4.6 | 13.5 | 13.6 |
| Expected return on plan assets | (5.8) | (5.5) | (17.6) | (16.2) |
| Recognized net actuarial loss (gain) | 0.6 | 0.6 | 2.0 | 1.8 |
| Net periodic benefit cost (credit) | $ (0.1) | $ 0.4 | $ (0.5) | $ 1.1 |
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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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- 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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