Pension and Other Postretirement Benefit Plans - Reconciliation of Combined Funded Status of Plans and Recognized in Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net benefit obligation at the end of the year	$ 437,920	$ 448,540	$ 448,402
Fair value of plan assets at the end of the year	382,250	390,210	390,829
Underfunded amount recognized at the end of the year	55,670	58,330
Non-U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net benefit obligation at the end of the year	2,388,077	2,258,129	2,149,246
Fair value of plan assets at the end of the year	2,043,356	1,916,637	$ 1,867,481
Underfunded amount recognized at the end of the year	$ 344,721	$ 341,492