Inventories (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 31, 2019
At lower of LIFO cost or market:
Hogs and materials	$ 394	$ 387
Fresh pork and materials	29	46
LIFO adjustment	(71)	(64)
Total inventories at lower of LIFO cost or market	352	369
At lower of FIFO cost and net realizable value:
Grains, oilseeds and other commodities	424	353
Sugar produced and in process	26	17
Other	118	109
Total inventories at lower of FIFO cost and NRV	568	479
Grain, flour and feed at lower of weighted average cost and NRV	142	174
Total inventories	$ 1,062	$ 1,022