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Pension and Other Postretirement Pension Plans (Accumulated Benefit Obligation) (Details) - USD ($)
$ in Thousands
Sep. 29, 2017
Sep. 30, 2016
U.S. Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation at the end of the year $ 169,942 $ 185,664
Non-U.S. Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation at the end of the year $ 1,291,600 $ 1,331,884