Accumulated Other Comprehensive Income (Loss) (Reclassification from AOCIL) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 28, 2019	Sep. 29, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss)
Prior service cost (credit)	$ (302)	$ (344)
Actuarial losses	23,682	29,610
Reclassification from AOCIL into earnings - Retirement liability	23,380	29,266
Tax effect	(5,780)	(8,066)
Net reclassification from AOCIL into earnings	17,600	21,200
Reclassification from AOCIL into earnings	73	1,086
Tax effect	(9)	(377)
Net reclassification from AOCIL into earnings	64	709
Foreign currency contracts \| Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss)
Derivatives Gain (Loss) Reclassified from AOCIL into earnings	106	(388)
Foreign currency contracts \| Cost of sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss)
Derivatives Gain (Loss) Reclassified from AOCIL into earnings	1,108	2,171
Interest rate swaps \| Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Loss)
Derivatives Gain (Loss) Reclassified from AOCIL into earnings	$ (1,141)	$ (697)

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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