Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015	Apr. 01, 2017
Summary Of Significant Accounting Policies
Fiscal Period Duration - Weeks	1 year	1 year	1 year 7 days
Percentage of sales accounted for using percentage of completion	38.00%	34.00%	33.00%
Percent of sales as units are delivered or services are performed	62.00%	66.00%	67.00%
Vesting period	3 years
Goodwill impairment charge	$ 0	$ 4,800	$ 0
Tangible Asset Impairment Charges	1,378
Impairment charges of long-lived assets			2,432
Debt Issuance Costs, Net	3,468	5,457
Deferred Tax Assets, Net	$ 13,238	64,774
Accounting Standards Update 2015-03
Summary Of Significant Accounting Policies
Debt Issuance Costs, Net		5,457
Accounting Standards Update 2015-07
Summary Of Significant Accounting Policies
Investments Measured at Net Asset Value per Share		302,713
Accounting Standards Update 2015-17
Summary Of Significant Accounting Policies
Deferred Tax Assets, Net		92,620
New Accounting Pronouncement, Early Adoption, Effect
Summary Of Significant Accounting Policies
Restricted Cash and Cash Equivalents, Current				$ 37,366
Minimum
Summary Of Significant Accounting Policies
Standard Product Warranty Description	twelve
Maximum
Summary Of Significant Accounting Policies
Standard Product Warranty Description	sixty
Buildings and Improvements | Minimum
Summary Of Significant Accounting Policies
Estimated useful lives of property plant and equipment, years	15
Buildings and Improvements | Maximum
Summary Of Significant Accounting Policies
Estimated useful lives of property plant and equipment, years	40
Machinery And Equipment | Minimum
Summary Of Significant Accounting Policies
Estimated useful lives of property plant and equipment, years	5
Machinery And Equipment | Maximum
Summary Of Significant Accounting Policies
Estimated useful lives of property plant and equipment, years	15
Computer Equipment and Software | Minimum
Summary Of Significant Accounting Policies
Estimated useful lives of property plant and equipment, years	3
Computer Equipment and Software | Maximum
Summary Of Significant Accounting Policies
Estimated useful lives of property plant and equipment, years	7
Other Restructuring
Summary Of Significant Accounting Policies
Restructuring costs and asset impairment charges		$ 4,913
Other Restructuring | Finite-Lived Intangible Assets
Summary Of Significant Accounting Policies
Restructuring costs and asset impairment charges			$ 472
Performance-based Restricted Stock Units (PSUs)
Summary Of Significant Accounting Policies
Vesting period	3 years