Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Revenue Recognition
Net sales	$ 1,645	$ 1,663	$ 5,136	$ 5,028
Transferred at point in time | Net sales
Revenue Recognition
Concentration risk percentage	85.00%	85.00%	85.00%	85.00%
Products
Revenue Recognition
Net sales	$ 1,362	$ 1,359	$ 4,333	$ 4,117
Other
Revenue Recognition
Net sales	26	34	57	97
Pork
Revenue Recognition
Net sales	466	423	1,380	1,318
Pork | Products
Revenue Recognition
Net sales	391	381	1,205	1,165
Pork | Transportation
Revenue Recognition
Net sales	2		6	7
Pork | Energy
Revenue Recognition
Net sales	65	35	145	122
Pork | Other
Revenue Recognition
Net sales	8	7	24	24
CT&M
Revenue Recognition
Net sales	880	913	2,917	2,744
CT&M | Products
Revenue Recognition
Net sales	877	906	2,906	2,731
CT&M | Other
Revenue Recognition
Net sales	3	7	11	13
Marine
Revenue Recognition
Net sales	244	256	705	769
Marine | Transportation
Revenue Recognition
Net sales	244	256	705	769
Sugar and Alcohol
Revenue Recognition
Net sales	31	36	71	91
Sugar and Alcohol | Products
Revenue Recognition
Net sales	26	32	65	86
Sugar and Alcohol | Energy
Revenue Recognition
Net sales	5	4	6	5
Power
Revenue Recognition
Net sales	21	30	51	92
Power | Energy
Revenue Recognition
Net sales	21	30	51	92
All Other
Revenue Recognition
Net sales	3	5	12	14
All Other | Products
Revenue Recognition
Net sales	3	5	12	13
All Other | Transportation
Revenue Recognition
Net sales				1
Segment Totals
Revenue Recognition
Net sales	1,645	1,663	5,136	5,028
Segment Totals | Products
Revenue Recognition
Net sales	1,297	1,324	4,188	3,995
Segment Totals | Transportation
Revenue Recognition
Net sales	246	256	711	777
Segment Totals | Energy
Revenue Recognition
Net sales	91	69	202	219
Segment Totals | Other
Revenue Recognition
Net sales	$ 11	$ 14	$ 35	$ 37