Segment Information-Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019	Dec. 31, 2019
Segment Information
Net sales	$ 1,645	$ 1,663	$ 5,136	$ 5,028
Operating Income (Loss)	29	(6)	103	13
Income (loss) from affiliates	(6)	(15)	(27)	(49)
Total assets	5,976		5,976		$ 6,285
Investment in and Advances to Affiliates	698		698		735
Pork
Segment Information
Net sales	466	423	1,380	1,318
Operating Income (Loss)	4	(22)	47	(31)
Income (loss) from affiliates		(5)	(3)	(19)
Investment in and Advances to Affiliates	178		178		183
CT&M
Segment Information
Net sales	880	913	2,917	2,744
Operating Income (Loss)	28	14	82	50
Income (loss) from affiliates	(3)	(1)	(2)	(6)
Investment in and Advances to Affiliates	230		230		237
Marine
Segment Information
Net sales	244	256	705	769
Operating Income (Loss)	14	(2)	(3)	2
Income (loss) from affiliates	1	1	3	2
Investment in and Advances to Affiliates	32		32		32
Sugar and Alcohol
Segment Information
Net sales	31	36	71	91
Operating Income (Loss)	(1)	(1)	(4)	(9)
Income (loss) from affiliates				1
Investment in and Advances to Affiliates	5		5		5
Power
Segment Information
Net sales	21	30	51	92
Operating Income (Loss)	3	9	4	21
Income (loss) from affiliates		1		3
Investment in and Advances to Affiliates	3		3		3
Turkey
Segment Information
Income (loss) from affiliates	(4)	(11)	(25)	(30)
Investment in and Advances to Affiliates	250		250		275
All Other
Segment Information
Net sales	3	5	12	14
Operating Income (Loss)		1	1	2
Segment Totals
Segment Information
Net sales	1,645	1,663	5,136	5,028
Operating Income (Loss)	48	(1)	127	35
Income (loss) from affiliates	(6)	(15)	(27)	(49)
Total assets	4,574		4,574		4,684
Segment Totals | Pork
Segment Information
Total assets	1,765		1,765		1,802
Segment Totals | CT&M
Segment Information
Total assets	1,607		1,607		1,621
Segment Totals | Marine
Segment Information
Total assets	504		504		554
Segment Totals | Sugar and Alcohol
Segment Information
Total assets	147		147		139
Segment Totals | Power
Segment Information
Total assets	296		296		283
Segment Totals | Turkey
Segment Information
Total assets	250		250		275
Segment Totals | All Other
Segment Information
Total assets	5		5		10
Corporate
Segment Information
Operating Income (Loss)	(19)	$ (5)	(24)	$ (22)
Total assets	$ 1,402		$ 1,402		$ 1,601