Inventories (Details) - USD ($) $ in Millions	Jul. 01, 2017	Dec. 31, 2016
At lower of LIFO cost or market:
Live hogs and materials	$ 278	$ 273
Fresh pork and materials	27	34
Inventories at lower of LIFO cost or market, Gross	305	307
LIFO adjustment	(25)	(21)
Total inventories at lower of LIFO cost or market	280	286
At lower of FIFO cost or market:
Grains, oilseeds and other commodities	255	279
Sugar produced and in process	39	30
Other	65	62
Total inventories at lower of FIFO cost or market	359	371
Grain, flour and feed at lower of weighted average cost or market	83	105
Total inventories	$ 722	$ 762