Lines of Credit, Long-Term Debt, Commitments and Contingencies (Details) $ in Millions									6 Months Ended
	Nov. 11, 2022 employee	Sep. 23, 2022 claim	Sep. 30, 2021 USD ($)	Jul. 21, 2021 item	Jun. 28, 2018 plaintiff	May 15, 2018 USD ($)	Apr. 27, 2018 USD ($) employee	Mar. 20, 2018 USD ($) subsidiary	Dec. 31, 2018 plaintiff	Apr. 01, 2023 USD ($)	Mar. 28, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 22, 2022 claim
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Other long-term debt										$ 38		$ 38
Total debt at face value										708		710
Current maturities of long-term debt and unamortized discount										(9)		(8)
Long-term debt, less current maturities										699		702
Contingencies
Total liabilities										2,786		2,888
Assets										$ 7,795		$ 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
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%
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 | Cereoil Bankruptcy Trustee - Case One | Pending Litigation
Contingencies
Damages sought								$ 22
Number of subsidiaries | subsidiary								2
Cereoil | Cereoil Bankruptcy Trustee - Case Two | Pending Litigation
Contingencies
Damages sought							$ 23
Number of individuals employed by Seaboard serving as directors | employee							2
Total liabilities							$ 53
Assets							$ 30
Nolston | Nolston Bankruptcy Trustee | Pending Litigation
Contingencies
Damages sought						$ 8
Total liabilities						29
Assets						$ 15
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)										7.24%		7.03%
Committed and uncommitted bank lines | Denominated in foreign currencies
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding										$ 158		$ 194
Committed and uncommitted bank lines | South African Rand
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding										139		174
Committed bank lines
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding										190		131
Maximum capacity											$ 450
Uncommitted bank lines
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Lines of credit outstanding										269		326
Term loan due 2028
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Debt at face value										$ 668		$ 670
Effective interest rate (as a percent)										6.47%		6.01%
Foreign subsidiary obligations
Lines of Credit, Long-Term Debt, Commitments and Contingencies
Debt at face value										$ 2		$ 2