Inventories (Details) - USD ($) $ in Millions	Sep. 28, 2019	Dec. 31, 2018
At lower of LIFO cost or market:
Hogs and materials	$ 376	$ 361
Fresh pork and materials	35	36
LIFO adjustment	(66)	(58)
Total inventories at lower of LIFO cost or market	345	339
At lower of FIFO cost and net realizable value:
Grains, oilseeds and other commodities	306	229
Sugar produced and in process	25	17
Other	78	81
Total inventories at lower of FIFO cost and net realizable value	409	327
Grain, flour and feed at lower of weighted average cost and net realizable value	162	149
Total inventories	$ 916	$ 815