XML 103 R89.htm IDEA: XBRL DOCUMENT v3.22.4
Postretirement and Postemployment Benefits - Fair Value Hierarchy of Benefit Plan Assets (Details) - USD ($)
$ in Thousands
Sep. 25, 2022
Sep. 26, 2021
Sep. 27, 2020
NAV | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets $ 32,515 $ 3,235  
Level 1 | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Level 2 | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Level 3 | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 23,903 26,802 $ 25,706
Other Postretirement Benefits Plan | NAV | Cash and cash equivalents      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | NAV | Domestic equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 791 904  
Other Postretirement Benefits Plan | NAV | Emerging equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | NAV | International equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | NAV | Debt Securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | NAV | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 2,782    
Other Postretirement Benefits Plan | Level 1 | Cash and cash equivalents      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 26 25  
Other Postretirement Benefits Plan | Level 1 | Domestic equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 1,910 2,643  
Other Postretirement Benefits Plan | Level 1 | Emerging equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 456 603  
Other Postretirement Benefits Plan | Level 1 | International equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 573 747  
Other Postretirement Benefits Plan | Level 1 | Debt Securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 17,248 18,363  
Other Postretirement Benefits Plan | Level 1 | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0    
Other Postretirement Benefits Plan | Level 2 | Cash and cash equivalents      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 2 | Domestic equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 2 | Emerging equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 2 | International equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 480 660  
Other Postretirement Benefits Plan | Level 2 | Debt Securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 2 | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0    
Other Postretirement Benefits Plan | Level 3 | Cash and cash equivalents      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 3 | Domestic equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 3 | Emerging equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 3 | International equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 0  
Other Postretirement Benefits Plan | Level 3 | Debt Securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets 0 $ 0  
Other Postretirement Benefits Plan | Level 3 | Hedge fund investments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Postretirement assets $ 0