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Accumulated Other Comprehensive Income (Loss) (Changes in AOCIL by Component) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year $ 1,436,813 $ 1,400,144  
Other comprehensive income (loss), net of tax 56,433 (63,482) $ 37,893
End of year 1,636,087 1,436,813 1,400,144
Accumulated foreign currency translation      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (182,024) (92,989)  
OCI before reclassifications 41,089 (101,906)  
Amounts reclassified from AOCIL 449 12,871  
Other comprehensive income (loss), net of tax 41,538 (89,035)  
End of year (140,486) (182,024) (92,989)
Accumulated retirement liability      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (125,231) (153,210)  
OCI before reclassifications (6,716) 13,845  
Amounts reclassified from AOCIL 18,342 14,134  
Other comprehensive income (loss), net of tax 11,626 27,979  
End of year (113,605) (125,231) (153,210)
Accumulated gain (loss) on derivatives      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (3,787) (1,361)  
OCI before reclassifications 1,021 (4,031)  
Amounts reclassified from AOCIL 2,248 1,605  
Other comprehensive income (loss), net of tax 3,269 (2,426)  
End of year (518) (3,787) (1,361)
Total      
AOCIL Attributable to Parent, Net of Tax [Roll Forward]      
Beginning of year (311,042) (247,560) (285,453)
OCI before reclassifications 35,394 (92,092)  
Amounts reclassified from AOCIL 21,039 28,610  
Other comprehensive income (loss), net of tax 56,433 (63,482) 37,893
End of year $ (254,609) $ (311,042) $ (247,560)