Segment Information - Disaggregation of sales (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021 USD ($)	Jun. 27, 2020 USD ($)	Jul. 03, 2021 USD ($) segment	Jun. 27, 2020 USD ($)
Revenue Recognition
Number of reportable segments | segment			6
Net sales	$ 2,430	$ 1,808	$ 4,489	$ 3,491
Products
Revenue Recognition
Net sales	2,089	1,589	3,820	2,971
Other
Revenue Recognition
Net sales	11	13	26	31
Pork
Revenue Recognition
Net sales	693	459	1,258	914
Pork | Products
Revenue Recognition
Net sales	596	409	1,091	814
Pork | Transportation
Revenue Recognition
Net sales	2	2	3	4
Pork | Energy
Revenue Recognition
Net sales	89	40	152	80
Pork | Other
Revenue Recognition
Net sales	6	8	12	16
CT&M
Revenue Recognition
Net sales	1,377	1,123	2,528	2,037
CT&M | Products
Revenue Recognition
Net sales	1,374	1,119	2,520	2,029
CT&M | Other
Revenue Recognition
Net sales	3	4	8	8
Marine
Revenue Recognition
Net sales	319	192	619	461
Marine | Transportation
Revenue Recognition
Net sales	319	192	619	461
Sugar and Alcohol
Revenue Recognition
Net sales	26	18	52	40
Sugar and Alcohol | Products
Revenue Recognition
Net sales	26	18	50	39
Sugar and Alcohol | Energy
Revenue Recognition
Net sales			2	1
Power
Revenue Recognition
Net sales	11	13	24	30
Power | Energy
Revenue Recognition
Net sales	11	13	24	30
All Other
Revenue Recognition
Net sales	4	3	8	9
All Other | Products
Revenue Recognition
Net sales	4	3	7	9
All Other | Transportation
Revenue Recognition
Net sales			1
Segment Totals
Revenue Recognition
Net sales	2,430	1,808	4,489	3,491
Segment Totals | Products
Revenue Recognition
Net sales	2,000	1,549	3,668	2,891
Segment Totals | Transportation
Revenue Recognition
Net sales	321	194	623	465
Segment Totals | Energy
Revenue Recognition
Net sales	100	53	178	111
Segment Totals | Other
Revenue Recognition
Net sales	$ 9	$ 12	$ 20	$ 24