Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 5,714,691
Other comprehensive income (loss)	$ 34,625	$ 96,673	5,120	$ 43,114
Ending balance	5,835,813		5,835,813
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(916,812)
Other comprehensive income (loss)			(3,775)
Reclassifications from other comprehensive income (loss)			8,895
Ending balance	(911,692)		(911,692)
Change in Pension Liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(436,749)
Other comprehensive income (loss)			3,554
Reclassifications from other comprehensive income (loss)			7,853
Ending balance	(425,342)		(425,342)
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(480,045)
Other comprehensive income (loss)			8,377
Reclassifications from other comprehensive income (loss)			0
Ending balance	(471,668)		(471,668)
Gain/(Loss) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(18)
Other comprehensive income (loss)			(15,706)
Reclassifications from other comprehensive income (loss)			1,042
Ending balance	$ (14,682)		$ (14,682)