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Revenue from Contracts with Customers Revenue from Contracts with Customers (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020	Oct. 03, 2020
Disaggregation of Revenue [Line Items]
Revenue for adjustments made to performance obligations satisified in prior year	$ 1,962	$ (6,023)	$ 14,497	$ 3,655
Contract loss and contract-related reserves	65,988		65,988		$ 72,412
Revenue recognized due to contract liabilities	40,082		138,181
Remaining performance obligation, amount	$ 4,600,000		$ 4,600,000
Remaining performance obligation, percentage	43.00%		43.00%
Transferred over time
Disaggregation of Revenue [Line Items]
Revenue, net percent	63.00%		63.00%
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue, net percent	37.00%		37.00%
Minimum
Disaggregation of Revenue [Line Items]
Payment terms - days			30
Maximum
Disaggregation of Revenue [Line Items]
Payment terms - days			60 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-04-03
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	12 months		12 months

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- Definition

Percentage of total revenue from sale of goods and services rendered during the reporting period.

+ References

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

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- Definition

Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12A
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL108322424-203045

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Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
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Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
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Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue.

+ References

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