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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
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Accrued expenses and Other Current Liabilities [Abstract] |  |
Ongoing accrued expenses | $ 206,905 | $ 217,133
Project-related provisions | 125,612 | 121,658
Taxes payable | 34,717 | 25,739
Dividends payable | 44,956 | 43,084
Derivative instruments | 3,281 | 4,902
Other | 196,832 | 181,092
Total accrued expenses and other current liabilities | $ 612,303 | $ 593,608

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- Definition Carrying value as of the balance sheet date of short-term obligations incurred and payable, pertaining to costs incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. + References No definition available. + Details
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