Summary Of Significant Accounting Policies [Line Items]

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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.

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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.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	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