Segment Information - Disaggregation of sales (Details) $ in Millions	3 Months Ended
	Apr. 03, 2021 USD ($) segment	Mar. 28, 2020 USD ($)
Revenue Recognition
Number of reportable segments | segment	6
Net sales	$ 2,059	$ 1,683
Products
Revenue Recognition
Net sales	1,731	1,382
Other
Revenue Recognition
Net sales	15	18
Pork
Revenue Recognition
Net sales	565	455
Pork | Products
Revenue Recognition
Net sales	495	405
Pork | Transportation
Revenue Recognition
Net sales	1	2
Pork | Energy
Revenue Recognition
Net sales	63	40
Pork | Other
Revenue Recognition
Net sales	6	8
CT&M
Revenue Recognition
Net sales	1,151	914
CT&M | Products
Revenue Recognition
Net sales	1,146	910
CT&M | Other
Revenue Recognition
Net sales	5	4
Marine
Revenue Recognition
Net sales	300	269
Marine | Transportation
Revenue Recognition
Net sales	300	269
Sugar and Alcohol
Revenue Recognition
Net sales	26	22
Sugar and Alcohol | Products
Revenue Recognition
Net sales	24	21
Sugar and Alcohol | Energy
Revenue Recognition
Net sales	2	1
Power
Revenue Recognition
Net sales	13	17
Power | Energy
Revenue Recognition
Net sales	13	17
All Other
Revenue Recognition
Net sales	4	6
All Other | Products
Revenue Recognition
Net sales	3	6
All Other | Transportation
Revenue Recognition
Net sales	1
Segment Totals
Revenue Recognition
Net sales	2,059	1,683
Segment Totals | Products
Revenue Recognition
Net sales	1,668	1,342
Segment Totals | Transportation
Revenue Recognition
Net sales	302	271
Segment Totals | Energy
Revenue Recognition
Net sales	78	58
Segment Totals | Other
Revenue Recognition
Net sales	$ 11	$ 12