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Other Financial Information (Components of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 29, 2017	Sep. 30, 2016
Other Financial Information [Abstract]
Accrued payroll and related liabilities	$ 572,946	$ 561,652
Project-related accruals	71,815	102,400
Non project-related accruals	68,025	87,813
Insurance liabilities	67,546	54,984
Sales and other similar taxes	32,163	37,029
Deferred rent	60,593	69,059
Dividends payable	18,180
Other	48,419	25,441
Total	$ 939,687	$ 938,378

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Insurance liabilities

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Other Financial Information [Abstract]

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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-Subparagraph (SX 210.5-02.20)
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For a classified balance sheet, the cumulative difference as of the balance sheet date between the payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, within one year of the balance sheet date.

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-Publisher FASB
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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).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

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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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