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v3.26.1

Debt - Credit Agreement - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025 | Jan. 31, 2023
Debt Instrument [Line Items] |  |  |  |  |
Amount borrowed from credit facility foreign subsidiary | $ 46.3 |  | $ 46.3 |  |
Interest expense | $ 15.3 | $ 19.6 | $ 32.6 | $ 41.7 |
Interest rate during period | 4.70% | 4.90% | 4.70% | 4.80% |
Line of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unused commitments under revolving credit facility | $ 1,006.3 |  | $ 1,006.3 |  |
Amounts available for borrowing | $ 989.2 |  | $ 989.2 |  |
Line of Credit | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit facility commitment fees percentage |  |  | 0.175% |  |
Line of Credit | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit facility commitment fees percentage |  |  | 0.325% |  |
Secured Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit facility amount |  |  |  |  | $ 500.0
Annual rate for borrowings outstanding | 5.10% |  | 5.10% |  |
Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit facility amount |  |  |  |  | $ 1,250.0

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