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Receivables (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 30, 2018	Sep. 29, 2018
Accounts, Notes, Loans and Financing Receivable
Amounts billed under over-time contracts	$ 222,075		$ 156,414
Unbilled Contracts Receivable	$ 468,824	$ 405,610	316,489
Percent of unbilled amounts excepted to be collected within one year	99.00%
Government | United States
Accounts, Notes, Loans and Financing Receivable
Amounts billed under over-time contracts	$ 7,573		6,106
Unbilled Contracts Receivable	48,004		25,915
Boeing
Accounts, Notes, Loans and Financing Receivable
Receivables from customers	$ 245,892		$ 178,798

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Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract.

+ 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
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-Section 50
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Amount due from customers for fees and charges arising from transactions related to the entity's brokerage activities and operations.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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