Financial Instruments and Fair Value Measurements (Narrative) (Details) - Measurement Input, Discount Rate [Member] |
Jun. 30, 2026 |
Sep. 30, 2025 |
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| Long-Term Debt [Member] | Weighted Average [Member] | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] | ||
| Interest rate used to measure long-term debt | 4.5 | 4.2 |
| Long Term Notes Receivable from Municipalities [Member] | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] | ||
| Interest rate used to measure municipal notes | 3.1 | 3 |
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Value of input used to measure long-term debt. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Value of input used to measure municipal notes No definition available.
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