Pension and Other Postretirement Benefit Plans - Summary of Changes in the Fair Value of Plans' Level 3 Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2020	Sep. 27, 2019
U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	$ 390,210	$ 390,829
Effect of exchange rate changes	0	2,271
Fair value of plan assets at the end of the year	382,250	390,210
U.S. Plans | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	0
Fair value of plan assets at the end of the year	0	0
Non-U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	1,916,637	1,867,481
Effect of exchange rate changes	(101,316)	109,681
Fair value of plan assets at the end of the year	2,043,356	1,916,637
Non-U.S. Plans | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	300,527
Fair value of plan assets at the end of the year	344,861	300,527
Non-U.S. Plans | Real estate investments
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	137,472
Fair value of plan assets at the end of the year	115,805	137,472
Non-U.S. Plans | Real estate investments | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	97,539	99,587
Purchases, sales, and settlements	(475)	(17,902)
Realized and unrealized gains (losses)	3,337	21,838
Disposition of ECR Assets		0
Effect of exchange rate changes	5,021	(5,984)
Fair value of plan assets at the end of the year	105,422	97,539
Non-U.S. Plans | Insurance contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	77,266
Fair value of plan assets at the end of the year	90,020	77,266
Non-U.S. Plans | Insurance contracts | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	72,788	95,782
Purchases, sales, and settlements	(7,375)	(5,126)
Realized and unrealized gains (losses)	(1,399)	9,134
Disposition of ECR Assets		(22,885)
Effect of exchange rate changes	3,695	(4,117)
Fair value of plan assets at the end of the year	67,709	72,788
Non-U.S. Plans | Hedge funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	137,356
Fair value of plan assets at the end of the year	178,883	137,356
Non-U.S. Plans | Hedge funds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the year	130,200	135,786
Purchases, sales, and settlements	29,999	(26,591)
Realized and unrealized gains (losses)	5,435	29,161
Disposition of ECR Assets		0
Effect of exchange rate changes	6,096	(8,156)
Fair value of plan assets at the end of the year	$ 171,730	$ 130,200