Inventories (Details) - USD ($) $ in Millions	Jun. 29, 2019	Dec. 31, 2018
At lower of LIFO cost or market:
Hogs and materials	$ 375	$ 361
Fresh pork and materials	32	36
LIFO adjustment	(67)	(58)
Total inventories at lower of LIFO cost or market	340	339
At lower of FIFO cost and net realizable value:
Grains, oilseeds and other commodities	277	229
Sugar produced and in process	32	17
Other	63	81
Total inventories at lower of FIFO cost and net realizable value	372	327
Grain, flour and feed at lower of weighted average cost and net realizable value	159	149
Total inventories	$ 871	$ 815