Accumulated Other Comprehensive Income (Loss) (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss)	$ (3,904)	$ 15,854
Accumulated foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCIL beginning of period	(99,415)
Other comprehensive income (loss) before reclassifications	(9,387)
Amounts reclassified from AOCIL	0
Other comprehensive income (loss)	(9,387)
AOCIL end of period	(108,802)
Accumulated retirement liability
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCIL beginning of period	(272,317)
Other comprehensive income (loss) before reclassifications	414
Amounts reclassified from AOCIL	4,405
Other comprehensive income (loss)	4,819
AOCIL end of period	(267,498)
Accumulated gain (loss) on derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCIL beginning of period	(449)
Other comprehensive income (loss) before reclassifications	494
Amounts reclassified from AOCIL	170
Other comprehensive income (loss)	664
AOCIL end of period	215
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCIL beginning of period	(372,181)
Other comprehensive income (loss) before reclassifications	(8,479)
Amounts reclassified from AOCIL	4,575
Other comprehensive income (loss)	(3,904)	$ 15,854
AOCIL end of period	$ (376,085)