Segment Information - Disaggregation of sales (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 28, 2024 USD ($)	Jun. 29, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 28, 2024 USD ($) segment item	Sep. 30, 2023 USD ($)
Revenue Recognition
Number of reportable segments | segment				6
Proceeds from sale				$ 13.0
Net sales	$ 2,218.0		$ 2,388.0	6,618.0	$ 7,280.0
Products
Revenue Recognition
Net sales	1,805.0		1,966.0	5,399.0	5,907.0
Other
Revenue Recognition
Net sales	69.0		73.0	177.0	188.0
Pork
Revenue Recognition
Net sales	493.0		483.0	1,532.0	1,370.0
Pork | Products
Revenue Recognition
Net sales	477.0		471.0	1,486.0	1,334.0
Pork | Transportation
Revenue Recognition
Net sales	5.0		3.0	12.0	9.0
Pork | Other
Revenue Recognition
Net sales	11.0		9.0	34.0	27.0
Liquid Fuels
Revenue Recognition
Net sales	182.0		208.0	387.0	530.0
Liquid Fuels | Products
Revenue Recognition
Net sales	182.0		208.0	387.0	530.0
Commodity Trading and Milling
Revenue Recognition
Net sales	1,115.0		1,253.0	3,436.0	3,932.0
Commodity Trading and Milling | Disposed of by Sale
Revenue Recognition
Ownership percentage sold		20.00%
Proceeds from sale		$ 13.0
Commodity Trading and Milling | Products
Revenue Recognition
Net sales	1,111.0		1,249.0	3,423.0	3,922.0
Commodity Trading and Milling | Other
Revenue Recognition
Net sales	4.0		4.0	13.0	10.0
Marine
Revenue Recognition
Net sales	324.0		333.0	981.0	1,137.0
Marine | Transportation
Revenue Recognition
Net sales	324.0		333.0	$ 981.0	1,137.0
Power
Revenue Recognition
Number of power of generating barges | item				2
Net sales	66.0		71.0	$ 173.0	186.0
Power | Energy
Revenue Recognition
Net sales	66.0		71.0	173.0	186.0
All Other
Revenue Recognition
Net sales	38.0		40.0	109.0	125.0
All Other | Products
Revenue Recognition
Net sales	35.0		38.0	103.0	121.0
All Other | Transportation
Revenue Recognition
Net sales				2.0	2.0
All Other | Energy
Revenue Recognition
Net sales	3.0		2.0	4.0	2.0
Segment Totals
Revenue Recognition
Net sales	2,218.0		2,388.0	6,618.0	7,280.0
Segment Totals | Products
Revenue Recognition
Net sales	1,805.0		1,966.0	5,399.0	5,907.0
Segment Totals | Transportation
Revenue Recognition
Net sales	329.0		336.0	995.0	1,148.0
Segment Totals | Energy
Revenue Recognition
Net sales	69.0		73.0	177.0	188.0
Segment Totals | Other
Revenue Recognition
Net sales	15.0		13.0	47.0	37.0
Segment Totals | Pork
Revenue Recognition
Net sales	502.0		495.0	1,560.0	1,405.0
Segment Totals | Liquid Fuels
Revenue Recognition
Net sales	182.0		208.0	387.0	530.0
Segment Totals | Commodity Trading and Milling
Revenue Recognition
Net sales	1,115.0		1,253.0	3,436.0	3,932.0
Segment Totals | Marine
Revenue Recognition
Net sales	325.0		334.0	984.0	1,140.0
Segment Totals | Power
Revenue Recognition
Net sales	66.0		71.0	173.0	186.0
Segment Totals | All Other
Revenue Recognition
Net sales	38.0		40.0	109.0	125.0
Intersegment Eliminations
Revenue Recognition
Net sales	(10.0)		(13.0)	(31.0)	(38.0)
Intersegment Eliminations | Pork
Revenue Recognition
Net sales	9.0		12.0	28.0	35.0
Intersegment Eliminations | Marine
Revenue Recognition
Net sales	$ 1.0		$ 1.0	$ 3.0	$ 3.0