Pension and Other Postretirement Benefit Plans - Schedule of Change in Plans' Combined Net Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net benefit obligation at the beginning of the year	$ 448,540	$ 448,402
Service cost	409	2,784	$ 4,765
Interest cost	12,673	16,697	13,778
Participants’ contributions	0	243
Actuarial (gains)/losses	15,584	52,720
Benefits paid	(22,836)	(30,648)
Curtailments/settlements/plan amendments	(16,450)	(39,388)
Disposition of ECR Plans	0	0
Effect of exchange rate changes and other, net	0	(2,270)
Net benefit obligation at the end of the year	437,920	448,540	448,402
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net benefit obligation at the beginning of the year	2,258,129	2,149,246
Service cost	5,710	7,171	8,269
Interest cost	39,469	52,627	49,324
Participants’ contributions	167	367
Actuarial (gains)/losses	35,626	314,889
Benefits paid	(64,395)	(72,453)
Curtailments/settlements/plan amendments	(4,782)	30,124
Disposition of ECR Plans	0	(99,504)
Effect of exchange rate changes and other, net	118,153	(124,338)
Net benefit obligation at the end of the year	$ 2,388,077	$ 2,258,129	$ 2,149,246