Inventories (Details) - USD ($) $ in Millions	Sep. 29, 2018	Dec. 31, 2017
At lower of LIFO cost or market:
Live hogs and materials	$ 345	$ 313
Fresh pork and materials	38	28
Inventories at lower of LIFO cost or market, Gross	383	341
LIFO adjustment	(39)	(31)
Total inventories at lower of LIFO cost or market	344	310
At lower of FIFO cost and net realizable value:
Grains, oilseeds and other commodities	292	253
Sugar produced and in process	29	38
Other	63	90
Total inventories at lower of FIFO cost and net realizable value	384	381
Grain, flour and feed at lower of weighted average cost and net realizable value	146	89
Total inventories	$ 874	$ 780