Lines of Credit, Long-Term Debt, Commitments and Contingencies (Details) $ in Millions							3 Months Ended	6 Months Ended	9 Months Ended
	Nov. 11, 2022 employee	Sep. 23, 2022 claim	Sep. 30, 2021 USD ($)	Jul. 21, 2021 item	Jun. 28, 2018 plaintiff	Mar. 20, 2018 USD ($) subsidiary	Jul. 01, 2023 USD ($)	Dec. 31, 2018 plaintiff	Sep. 30, 2023 USD ($)	Mar. 28, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 22, 2022 claim	May 15, 2018 USD ($)	Apr. 27, 2018 USD ($) employee
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Other long-term debt									$ 38		$ 38
Total debt at face value									704		710
Current maturities of long-term debt and unamortized discount									(8)		(8)
Long-term debt, less current maturities									696		702
Contingencies
Total liabilities									2,413		2,888
Assets									7,596		$ 7,902
Pork Product Purchasers | Pending Litigation
Contingencies
Number of plaintiffs | plaintiff					12			3
Pork Compensation Antitrust | Pending Litigation
Contingencies
Number of plaintiffs | employee	3
Cereoil Bankruptcy Trustee - Case One | Pending Litigation
Contingencies
Damages sought						$ 22
Damages sought, including interest									35
Number of subsidiaries | subsidiary						2
Cereoil Bankruptcy Trustee - Case Two | Pending Litigation
Contingencies
Number of individuals employed by Seaboard serving as directors | employee														2
Total liabilities									45					$ 53
Assets														$ 30
Cereoil Bankruptcy Trustee - Case Two | Pending Litigation | Maximum
Contingencies
Assets									17
Nolston Bankruptcy Trustee | Pending Litigation
Contingencies
Total liabilities									1				$ 29
Assets									$ 0				$ 15
Odette Blanco De Fernandez | Pending Litigation
Contingencies
Number of siblings added as plaintiffs | item				4
Term of concession to develop port facilities				70 years
Claimed ownership percentage of companies that owned concession and land				20.00%
DPP Class | Pending Litigation
Contingencies
Settlement amount							$ 10
HSBC | Pending Litigation
Contingencies
Number of claims | claim		1										7
Number of claims that were dismissed by a court | claim		6
Number of claims dismissed that can be refiled | claim		3
Number of claims dismissed that cannot be refiled unless successfully appealed | claim		3
Damages sought			$ 10
Interest and other relief sought			$ 3
Cereoil
Contingencies
Percentage of ownership									45.00%
Nolston
Contingencies
Percentage of ownership									45.00%
Committed and uncommitted bank lines
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Weighted average interest rate (as a percent)									10.02%		7.03%
Committed and uncommitted bank lines | Denominated in foreign currencies
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding									$ 82		$ 194
Committed and uncommitted bank lines | South African Rand
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding									73		174
Committed bank lines
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding									0		131
Maximum capacity										$ 450
Uncommitted bank lines
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding									170		326
Term loan due 2028
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Total debt at face value									$ 665		$ 670
Effective interest rate (as a percent)									7.04%		6.01%
Foreign subsidiary obligations
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Total debt at face value									$ 1		$ 2