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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
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Accrued expenses and Other Current Liabilities [Abstract] |  |
Ongoing accrued expenses | $ 217,133 | $ 259,661
Project-related provisions | 121,658 | 140,701
Taxes payable | 25,739 | 28,335
Dividends payable | 43,084 | 38,413
Derivative instruments | 4,902 | 5,053
Other | 181,092 | 175,494
Total accrued expenses and other current liabilities | $ 593,608 | $ 647,657

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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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