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Pension Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 28, 2024
Sep. 28, 2024
Components of net periodic benefit costs included in operating expenses [Abstract]    
Estimated obligation due to full withdrawal multi employer pension plans $ 19,662 $ 20,026
Pension Plans Defined Benefit [Member]    
Components of net periodic benefit costs included in operating expenses [Abstract]    
Defined benefit plan expected future benefit payments 4,000  
Postretirement Benefits [Member]    
Components of net periodic benefit costs included in operating expenses [Abstract]    
Defined benefit plan expected future benefit payments 342  
Postretirement Benefits [Member] | Other, Net [Member]    
Components of net periodic benefit costs included in operating expenses [Abstract]    
Employer contribution for postretirement health care and life insurance $ 67