Segment Information - Specific Financial Information About Each Segment (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Information
Sales to External Customers	$ 1,812	$ 1,663	$ 1,822	$ 1,543	$ 1,662	$ 1,651	$ 1,691	$ 1,579	$ 6,840	$ 6,583	$ 5,809
Operating Income (Loss)	91	$ (6)	$ 53	$ (34)	43	$ 37	$ 32	$ 97	104	209	240
Loss from affiliates									(41)	(44)	(7)
Depreciation and amortization									138	134	118
Total Assets	6,285				5,307				6,285	5,307
Investment in and Advances to Affiliates	735				804				735	804
Capital expenditures									349	162	173
Pork
Segment Information
Sales to External Customers									1,851	1,774	1,609
Operating Income (Loss)									54	117	193
Loss from affiliates									(22)	(30)	(10)
Depreciation and amortization									75	73	69
Total Assets	1,802				1,304				1,802	1,304
Investment in and Advances to Affiliates	183				192				183	192
Capital expenditures									164	86	100
CT&M
Segment Information
Sales to External Customers									3,672	3,428	2,945
Operating Income (Loss)									62	46	25
Loss from affiliates									(5)	(11)	7
Depreciation and amortization									25	22	10
Total Assets	1,621				1,423				1,621	1,423
Investment in and Advances to Affiliates	237				255				237	255
Capital expenditures									23	29	15
Marine
Segment Information
Sales to External Customers									1,061	1,057	956
Operating Income (Loss)									4	25	21
Loss from affiliates									3	2	(7)
Depreciation and amortization									23	24	24
Total Assets	554				345				554	345
Investment in and Advances to Affiliates	32				28				32	28
Capital expenditures									26	18	37
Sugar and Alcohol
Segment Information
Sales to External Customers									121	184	186
Operating Income (Loss)									(16)	9	21
Loss from affiliates									1	1	1
Depreciation and amortization									6	6	7
Total Assets	139				138				139	138
Investment in and Advances to Affiliates	5				4				5	4
Capital expenditures									15	5	20
Power
Segment Information
Sales to External Customers									117	122	97
Operating Income (Loss)									27	21	9
Loss from affiliates									3	10	6
Depreciation and amortization									8	8	8
Total Assets	283				203				283	203
Investment in and Advances to Affiliates	3				30				3	30
Capital expenditures									121	23	1
Turkey
Segment Information
Loss from affiliates									(21)	(16)	(4)
Total Assets	275				295				275	295
Investment in and Advances to Affiliates	275				295				275	295
All Other
Segment Information
Sales to External Customers									18	18	16
Operating Income (Loss)									2	2	2
Total Assets	10				8				10	8
Segment Totals
Segment Information
Sales to External Customers									6,840	6,583
Operating Income (Loss)									133	220	271
Depreciation and amortization									137	133	118
Total Assets	4,684				3,716				4,684	3,716
Capital expenditures									349	161	173
Corporate Items
Segment Information
Operating Income (Loss)									(29)	(11)	$ (31)
Depreciation and amortization									1	1
Total Assets	$ 1,601				$ 1,591				$ 1,601	1,591
Capital expenditures										$ 1