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Retirement Plan And Other Post-Retirement Benefits (Narrative) (Details) $ in Millions | 6 Months Ended
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Mar. 31, 2024 USD ($)
Retirement Plan |
Defined Benefit Plan Disclosure [Line Items] |
Company's contributions | $ 0.0
Retirement Plan | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Estimated future contributions in remainder of fiscal year | 0.0
Retirement Plan | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Estimated future contributions in remainder of fiscal year | 5.0
VEBA Trusts |
Defined Benefit Plan Disclosure [Line Items] |
Company's contributions | 0.0
Estimated future contributions in remainder of fiscal year | $ 0.0

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