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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Summary Of Significant Accounting Policies |  |  |
Fiscal Period Duration - Weeks | 1 year | 1 year | 1 year
Goodwill impairment charge | $ 0 | $ 0 | $ 0
Restructuring costs and asset impairment charges | $ 4,464 | $ 14,382 |
Tangible Asset Impairment Charges |  |  | $ 1,378
Stock Appreciation Rights (SARs) |  |  |
Summary Of Significant Accounting Policies |  |  |
Vesting period | 3 years |  |
Performance-based Restricted Stock Units (PSUs) |  |  |
Summary Of Significant Accounting Policies |  |  |
Vesting period | 3 years |  |
Minimum |  |  |
Summary Of Significant Accounting Policies |  |  |
Warranty period - months | twelve |  |
Minimum | Buildings and Improvements |  |  |
Summary Of Significant Accounting Policies |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Minimum | Machinery And Equipment |  |  |
Summary Of Significant Accounting Policies |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Minimum | Computer Equipment and Software |  |  |
Summary Of Significant Accounting Policies |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Maximum |  |  |
Summary Of Significant Accounting Policies |  |  |
Warranty period - months | sixty |  |
Maximum | Buildings and Improvements |  |  |
Summary Of Significant Accounting Policies |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |
Maximum | Machinery And Equipment |  |  |
Summary Of Significant Accounting Policies |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Maximum | Computer Equipment and Software |  |  |
Summary Of Significant Accounting Policies |  |  |
Property, Plant and Equipment, Useful Life | 7 years |  |

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- Definition Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266 + Details
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