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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Payables and Accruals [Abstract] |  |  |
Ongoing accrued expenses |  | $ 332,321 | $ 445,253
Project-related provisions |  | 26,143 | 42,719
Dividends payable | [1] | 57,156 | 54,081
Taxes payable |  | 34,131 | 47,697
Derivative instruments | [2] | 13,642 | 16,305
Other |  | 159,355 | 172,884
Accrued expenses and other current liabilities |  | $ 622,748 | $ 778,939
[1] | The amounts payable as a result of the August 6, 2025 and the August 7, 2024 dividend declarations, please see Note 20 t o the consolidated financial statements.
[2] | Includes derivatives that are designated as hedging instruments and derivatives that are not designated as hedging instruments, please see Note 7 t o the consolidated financial statements.

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