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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
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

X

- Definition

Amount of ongoing expenses incurred but not yet paid, due within one year or the normal operating cycle, if longer.

+ References

No definition available.

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X

- 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.

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- Definition

Derivative instruments.

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No definition available.

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- Definition

Cumulative provision related to costs associated with projects accumulated on the balance sheet.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Section 45
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-URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6935-107765

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- Definition

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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