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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) | Dec. 31, 2021 | Sep. 30, 2021
--- | --- | ---
Debt instrument | $ 452,000,000.0 | $ 452,200,000
Deferred financing costs | (5,100,000) | (5,300,000)
Current portion of long-term debt | (1,000,000.0) | (1,000,000.0)
Long-term debt | 445,900,000 | 445,900,000
Line of Credit Facility, Remaining Borrowing Capacity | 133.8 |
Unsecured Debt [Member] |  |
5.5% Senior Notes | 450,000,000.0 | 450,000,000.0
Other [Member] |  |
Debt instrument | $ 2,000,000.0 | $ 2,200,000

X
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