Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated foreign currency translation	$ 9,254	$ 40,572	$ 33,493
Other comprehensive income (loss), before reclassifications - Foreign currency translation	(31,318)	7,079
Amounts reclassified from AOCI - Foreign currency translation	0	0
Other comprehensive income (loss) - Foreign currency translation	(31,318)	7,079	144
Accumulated retirement liability	(214,984)	(173,695)	(280,424)
Other comprehensive income (loss) before reclassification - Retirement liability	(53,224)	88,274
Amounts reclassified from AOCI - Retirement liability	11,935	18,455
Other comprehensive income (loss) - Retirement liability	(41,289)	106,729	(46,296)
Accumulated gain (loss) on derivatives	(1,108)	(1,035)	220
Other comprehensive income (loss) before reclassification - Derivatives	(1,377)	(1,110)
Amounts reclassified from AOCI - Derivatives	1,304	(145)
Other comprehensive income (loss) - Derivatives	(73)	(1,255)	385
Accumulated other comprehensive loss	(206,838)	(134,158)	(246,711)
Other comprehensive income (loss) before reclassifications - Total	(85,919)	94,243
Amounts reclassified from AOCI - Total	13,239	18,310
Other comprehensive income (loss) - Total	$ (72,680)	$ 112,553