Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Net sales:
Total net sales	$ 2,276	$ 1,645	$ 6,765	$ 5,136
Cost of sales and operating expenses:
Total cost of sales and operating expenses	2,076	1,517	6,134	4,784
Gross income	200	128	631	352
Selling, general and administrative expenses	88	89	262	241
Operating income	112	39	369	111
Other income (expense):
Interest expense	(11)	(6)		(17)
Interest expense			(7)
Interest income	5	6	16	17
Loss from affiliates	(1)	(6)		(27)
Other investment income (loss), net	(9)	56	108	(41)
Foreign currency gains (losses), net	5	(5)	7	(21)
Miscellaneous, net	3	1	10	3
Total other income (expense), net	(8)	46	134	(86)
Earnings before income taxes	104	85	503	25
Income tax benefit (expense)	(10)	69	(54)	(1)
Net earnings	94	154	449	24
Less: Net loss (earnings) attributable to noncontrolling interests	0	0	0	0
Net earnings attributable to Seaboard	$ 94	$ 154	$ 449	$ 24
Earnings per common share (in dollars per share)	$ 81.50	$ 132.58	$ 387.09	$ 20.08
Average number of shares outstanding (in shares)	1,160,779	1,160,779	1,160,779	1,161,792
Other comprehensive income (loss), net of income tax expense of $1, $2, $2 and $3:
Foreign currency translation adjustment	$ 8	$ 5	$ 8	$ (11)
Unrecognized pension cost	1	5	6	7
Other comprehensive income (loss), net of tax	9	10	14	(4)
Comprehensive income	103	164	463	20
Less: Comprehensive loss (income) attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Seaboard	103	164	463	20
Products
Net sales:
Total net sales	1,908	1,362	5,728	4,333
Cost of sales and operating expenses:
Total cost of sales and operating expenses	1,782	1,284	5,282	4,082
Services
Net sales:
Total net sales	355	257	998	746
Cost of sales and operating expenses:
Total cost of sales and operating expenses	282	215	812	656
Other
Net sales:
Total net sales	13	26	39	57
Cost of sales and operating expenses:
Total cost of sales and operating expenses	$ 12	$ 18	$ 40	$ 46