Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Net sales:
Total net sales	$ 1,645	$ 1,663	$ 5,136	$ 5,028
Cost of sales and operating expenses:
Total cost of sales and operating expenses	1,527	1,589	4,792	4,768
Gross income	118	74	344	260
Selling, general and administrative expenses	89	80	241	247
Operating income (loss)	29	(6)	103	13
Other income (expense):
Interest expense	(6)	(9)	(17)	(27)
Interest income	6	10	17	25
Loss from affiliates	(6)	(15)	(27)	(49)
Other investment income (loss), net	56	2	(41)	152
Foreign currency gains (losses), net	(5)	1	(21)	3
Miscellaneous, net	1	(1)	3	(1)
Total other income (expense), net	46	(12)	(86)	103
Earnings (loss) before income taxes	75	(18)	17	116
Income tax benefit (expense)	72	11	1	(8)
Net earnings (loss)	147	(7)	18	108
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to Seaboard	$ 147	$ (7)	$ 18	$ 108
Earnings (loss) per common share	$ 126.17	$ (6.00)	$ 15.14	$ 92.97
Average number of shares outstanding (in shares)	1,160,779	1,165,081	1,161,792	1,166,073
Other comprehensive income (loss), net of income tax expense of $2, $0, $3 and $0:
Foreign currency translation adjustment	$ 5	$ 2	$ (11)	$ (9)
Unrecognized pension cost	5	1	7	7
Other comprehensive income (loss), net of tax	10	3	(4)	(2)
Comprehensive income (loss)	157	(4)	14	106
Less: Comprehensive loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income (loss) attributable to Seaboard	157	(4)	14	106
Products
Net sales:
Total net sales	1,362	1,359	4,333	4,117
Cost of sales and operating expenses:
Total cost of sales and operating expenses	1,294	1,329	4,090	3,981
Services
Net sales:
Total net sales	257	270	746	814
Cost of sales and operating expenses:
Total cost of sales and operating expenses	215	239	656	717
Other
Net sales:
Total net sales	26	34	57	97
Cost of sales and operating expenses:
Total cost of sales and operating expenses	$ 18	$ 21	$ 46	$ 70