Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Net sales:
Total net sales	$ 1,808	$ 1,822	$ 3,491	$ 3,365
Cost of sales and operating expenses:
Total cost of sales and operating expenses	1,717	1,686	3,265	3,179
Gross income	91	136	226	186
Selling, general and administrative expenses	80	83	152	167
Operating income	11	53	74	19
Other income (expense):
Interest expense	(6)	(12)	(11)	(18)
Interest income	4	8	11	15
Loss from affiliates	(17)	(16)	(21)	(34)
Other investment income (loss), net	128	37	(97)	150
Foreign currency gains (losses), net	(5)	(1)	(16)	2
Miscellaneous, net	1		2
Total other income (expense), net	105	16	(132)	115
Earnings (loss) before income taxes	116	69	(58)	134
Income tax expense	(142)	(11)	(71)	(19)
Net earnings (loss)	(26)	58	(129)	115
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to Seaboard	$ (26)	$ 58	$ (129)	$ 115
Earnings (loss) per common share	$ (22.35)	$ 50.13	$ (110.88)	$ 98.92
Average number of shares outstanding (in shares)	1,160,779	1,165,740	1,162,307	1,166,575
Other comprehensive income (loss), net of income tax expense of $1, $0, $1 and $0:
Foreign currency translation adjustment	$ (19)	$ (9)	$ (16)	$ (11)
Unrecognized pension cost		3	2	6
Other comprehensive loss, net of tax	(19)	(6)	(14)	(5)
Comprehensive income (loss)	(45)	52	(143)	110
Less: Comprehensive loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income (loss) attributable to Seaboard	(45)	52	(143)	110
Products
Net sales:
Total net sales	1,589	1,513	2,971	2,758
Cost of sales and operating expenses:
Total cost of sales and operating expenses	1,518	1,422	2,796	2,652
Services
Net sales:
Total net sales	206	275	489	544
Cost of sales and operating expenses:
Total cost of sales and operating expenses	185	238	441	478
Other
Net sales:
Total net sales	13	34	31	63
Cost of sales and operating expenses:
Total cost of sales and operating expenses	$ 14	$ 26	$ 28	$ 49