Accumulated Other Comprehensive Income (Loss) (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated foreign currency translation at beginning of period	$ (83,166)
Other comprehensive income (loss) before reclassifications - Foreign currency translation	10,364
Amounts reclassified from AOCIL - Foreign currency translation	0
Other comprehensive income (loss) - Foreign currency translation	10,364
Accumulated foreign currency translation at end of period	(72,802)
Accumulated retirement liability at beginning of period	(251,865)
Other comprehensive income (loss) before reclassifications - Retirement liability	(363)
Amounts reclassified from AOCIL - Retirement liability	4,619	$ 6,009
Other comprehensive income (loss) retirement liability	4,256	8,572
Accumulated retirement liability at end of period	(247,609)
Accumulated loss on derivatives at beginning of period	(460)
Other comprehensive income (loss) before reclassification - Derivatives	905	(714)
Amounts reclassified from AOCIL - Derivatives	329	1,288
Other comprehensive income (loss) - Derivatives	1,234	574
Accumulated loss on derivatives at end of period	774
Accumulated other comprehensive loss at beginning of period	(335,491)
Other comprehensive income (loss) before reclassifications - Total	10,906
Amounts reclassified from AOCIL - Total	4,948
Other comprehensive income (loss), net of tax	15,854	$ (32,363)
Accumulated other comprehensive loss at end of period	$ (319,637)