Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
At lower of LIFO cost or market:
Live hogs and materials	$ 296	$ 273
Fresh pork and materials	32	34
Inventories at lower of LIFO cost or market, Gross	328	307
LIFO adjustment	(23)	(21)
Total inventories at lower of LIFO cost or market	305	286
At lower of FIFO cost or market:
Grains, oilseeds and other commodities	330	279
Sugar produced and in process	33	30
Other	72	62
Total inventories at lower of FIFO cost or market	435	371
Grain, flour and feed at lower of weighted average cost or market	88	105
Total inventories	$ 828	$ 762