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Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis - Additional Information (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Sep. 30, 2023
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Cash |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash deposits | $ 142.8 | $ 113.2

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