Segment Information - Specific Financial Information About Each Segment (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Information
Sales to External Customers									$ 7,126	$ 6,840	$ 6,583
Operating Income (Loss)	$ 134	$ 39	$ 9	$ 63	$ 89	$ (8)	$ 63	$ (34)	245	110	236
Income (Loss) from affiliates									(18)	(41)	(44)
Depreciation and amortization									172	138	134
Total assets	6,399				6,349				6,399	6,349
Investment in and Advances to Affiliates	698				735				698	735
Capital expenditures									259	349	162
Pork
Segment Information
Sales to External Customers									1,941	1,851	1,774
Operating Income (Loss)									131	60	144
Income (Loss) from affiliates									(9)	(22)	(30)
Depreciation and amortization									106	75	73
Total assets	1,927				1,866				1,927	1,866
Investment in and Advances to Affiliates	172				183				172	183
Capital expenditures									207	164	86
CT&M
Segment Information
Sales to External Customers									3,994	3,672	3,428
Operating Income (Loss)									118	62	46
Income (Loss) from affiliates									(2)	(5)	(11)
Depreciation and amortization									28	25	22
Total assets	1,585				1,621				1,585	1,621
Investment in and Advances to Affiliates	222				237				222	237
Capital expenditures									8	23	29
Marine
Segment Information
Sales to External Customers									1,005	1,061	1,057
Operating Income (Loss)									21	4	25
Income (Loss) from affiliates									2	3	2
Depreciation and amortization									23	23	24
Total assets	508				554				508	554
Investment in and Advances to Affiliates	30				32				30	32
Capital expenditures									10	26	18
Sugar and Alcohol
Segment Information
Sales to External Customers									106	121	184
Operating Income (Loss)									2	(16)	9
Income (Loss) from affiliates									1	1	1
Depreciation and amortization									7	6	6
Total assets	153				139				153	139
Investment in and Advances to Affiliates	6				5				6	5
Capital expenditures									5	15	5
Power
Segment Information
Sales to External Customers									64	117	122
Operating Income (Loss)									3	27	21
Income (Loss) from affiliates										3	10
Depreciation and amortization									8	8	8
Total assets	302				283				302	283
Investment in and Advances to Affiliates	3				3				3	3
Capital expenditures									27	121	23
Turkey
Segment Information
Income (Loss) from affiliates									(10)	(21)	(16)
Total assets	265				275				265	275
Investment in and Advances to Affiliates	265				275				265	275
All Other
Segment Information
Sales to External Customers									16	18	18
Operating Income (Loss)									1	2	2
Total assets	6				10				6	10
Capital expenditures									2
Segment Totals
Segment Information
Sales to External Customers									7,126	6,840
Operating Income (Loss)									276	139	247
Depreciation and amortization									172	137	133
Total assets	4,746				4,748				4,746	4,748
Capital expenditures									259	349	161
Corporate
Segment Information
Operating Income (Loss)									(31)	(29)	(11)
Depreciation and amortization										1	1
Total assets	$ 1,653				$ 1,601				$ 1,653	$ 1,601
Capital expenditures											$ 1