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Accounts Receivable, Net - Additional Information (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Sep. 30, 2023
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Receivables [Abstract] |  |
Accounts receivable | $ 420.8 | $ 442.3
Allowance for doubtful accounts | 9.0 | 5.1
Amounts of retention on incomplete project | $ 60.8 | $ 58.7

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