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Accumulated Other Comprehensive Income (Loss) (Changes in AOCIL by Component) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year $ 1,243,083 $ 1,322,481  
Other comprehensive income (loss), net of tax 37,893 130,024 $ (42,685)
End of year 1,400,144 1,243,083 1,322,481
Accumulated foreign currency translation      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (102,994) (129,399)  
Other comprehensive income (loss) before reclassifications 12,559 26,898  
Amounts reclassified from AOCIL (2,554) (493)  
Other comprehensive income (loss), net of tax 10,005 26,405  
End of year (92,989) (102,994) (129,399)
Accumulated retirement liability      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (183,653) (285,734)  
Other comprehensive income (loss) before reclassifications 21,958 (13,659)  
Amounts reclassified from AOCIL 8,485 115,740  
Other comprehensive income (loss), net of tax 30,443 102,081  
End of year (153,210) (183,653) (285,734)
Accumulated gain (loss) on derivatives      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year 1,194 (344)  
Other comprehensive income (loss) before reclassifications (1,277) 2,245  
Amounts reclassified from AOCIL (1,278) (707)  
Other comprehensive income (loss), net of tax (2,555) 1,538  
End of year (1,361) 1,194 (344)
Accumulated Other Comprehensive (Loss) Income      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (285,453) (415,477) (372,792)
Other comprehensive income (loss) before reclassifications 33,240 15,484  
Amounts reclassified from AOCIL 4,653 114,540  
Other comprehensive income (loss), net of tax 37,893 130,024 (42,685)
End of year $ (247,560) $ (285,453) $ (415,477)