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Business And Summary Of Significant Accounting Policies (Schedule Of Inventories Of Processed Products, Livestock, And Supplies Valued At Lower Of Cost Or Market) (Details) - USD ($)
$ in Millions
Oct. 03, 2020
Jun. 27, 2020
Mar. 28, 2020
Dec. 28, 2019
Sep. 28, 2019
Jun. 29, 2019
Mar. 30, 2019
Dec. 29, 2018
Inventory Disclosure [Abstract]                
Processed products $ 2,223       $ 2,362      
Livestock 977       971      
Supplies and other 659       596      
Total inventory $ 3,859 $ 3,680 $ 3,792 $ 4,057 $ 3,929 $ 3,966 $ 3,706 $ 3,627