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v3.25.3

Long-Term Debt (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Debt Instrument |  |  |  |
Debt, long-term and short-term, combined amount, total | $ 1,090.0 | $ 840.0 |  |
Unamortized debt issuance expense | (5.7) | (6.9) |  |
Long-term debt | 1,084.3 | 833.1 |  |
Long-Term Debt, Maturity, Year Five | 1,090.0 |  |  |
Estimated future interest payments on debt | 342.7 |  |  |
Estimated future interest payments on debt, next 12 months | 74.8 |  |  |
Letter of Credit |  |  |  |
Debt Instrument |  |  |  |
Maximum borrowing capacity on line of credit | 20.0 |  |  |
Revolving Credit Facility |  |  |  |
Debt Instrument |  |  |  |
Debt, long-term and short-term, combined amount, total | 250.0 | 0.0 |  |
Maximum borrowing capacity on line of credit | 500.0 | 250.0 |  |
Payments of Financing Costs | 2.1 |  |  | $ 1.5
Proceeds from borrowing under line of credit | 700.0 | 0.0 | $ 115.0 |
Repayments of lines of credit | (450.0) | (25.0) | $ (189.0) |
Remaining borrowing capacity on line of credit | 247.6 | 250.0 |  |
Letters of credit outstanding, amount | 2.4 |  |  |
7.00% Senior Notes Maturing in March 2030 |  |  |  |
Debt Instrument |  |  |  |
Debt, long-term and short-term, combined amount, total | $ 840.0 | $ 840.0 |  |
Senior Notes [Member] | 7.00% Senior Notes Maturing in March 2030 |  |  |  |
Debt Instrument |  |  |  |
Long-term Debt, Gross |  |  |  | 840.0
Payments of debt issuance costs and deferred financing fees |  |  |  | $ (10.2)

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