Inventories (Details) - USD ($) $ in Millions	Mar. 30, 2019	Dec. 31, 2018
At lower of LIFO cost or market:
Hogs and materials	$ 374	$ 361
Fresh pork and materials	41	36
LIFO adjustment	(58)	(58)
Total inventories at lower of LIFO cost or market	357	339
At lower of FIFO cost and net realizable value:
Grains, oilseeds and other commodities	361	229
Sugar produced and in process	26	17
Other	85	81
Total inventories at lower of FIFO cost and net realizable value	472	327
Grain, flour and feed at lower of weighted average cost and net realizable value	159	149
Total inventories	$ 988	$ 815