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Restructuring (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Restructuring Cost and Reserve
Restructuring Charges	$ 0	$ 15,393	$ 15,449
Restructuring reserve	1,168	7,846	14,546	$ 11,389
Employee Severance
Restructuring Cost and Reserve
Restructuring Costs		9,117
Other Restructuring
Restructuring Cost and Reserve
Restructuring costs and asset impairment charges		4,913
Facility Closing
Restructuring Cost and Reserve
Restructuring Costs		$ 1,363
Contract Termination
Restructuring Cost and Reserve
Restructuring Charges			3,773
Finite-Lived Intangible Assets \| Other Restructuring
Restructuring Cost and Reserve
Restructuring costs and asset impairment charges			$ 472
2016 Plan
Restructuring Cost and Reserve
Restructuring reserve	$ 1,168