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Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended | 9 Months Ended | 3 Months Ended | 0 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 item | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Dec. 31, 2010
Operations of Seaboard Corporation and its Subsidiaries |  |  |  |  |  |  |
Percentage of ownership interest held by Seaboard Flour LLC and SFC Preferred LLC (Parent Companies) | 76.40%seb_PercentageOfOwnershipInterestByParent |  |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |  |  |
Goodwill | $ 14,846,000 us-gaap_Goodwill | $ 43,218,000 us-gaap_Goodwill |  |  |  |  |
Impairment charges | 0 us-gaap_GoodwillAndIntangibleAssetImpairment |  |  |  |  |  |
Changes in the asset retirement obligation |  |  |  |  |  |  |
Beginning balance | 15,578,000 us-gaap_AssetRetirementObligation | 14,315,000 us-gaap_AssetRetirementObligation |  | 15,578,000 us-gaap_AssetRetirementObligation |  |  |
Accretion Expense | 1,263,000 us-gaap_AssetRetirementObligationAccretionExpense | 1,177,000 us-gaap_AssetRetirementObligationAccretionExpense |  |  |  |  |
Disposals | (114,000)us-gaap_AssetRetirementObligationLiabilitiesSettled |  |  |  |  |  |
Liability for additional lagoons placed in service |  | 86,000 us-gaap_AssetRetirementObligationLiabilitiesIncurred |  |  |  |  |
Ending balance | 16,727,000 us-gaap_AssetRetirementObligation | 15,578,000 us-gaap_AssetRetirementObligation | 14,315,000 us-gaap_AssetRetirementObligation |  |  |  |
Reclassifications |  |  |  |  |  |  |
Increase in accounts payable due to reclassification |  | 10,552,000 us-gaap_IncreaseDecreaseInAccountsPayable |  |  |  |  |
Cash and Cash Equivalents |  |  |  |  |  |  |
Interest | 20,177,000 us-gaap_InterestPaidNet | 11,119,000 us-gaap_InterestPaidNet | 11,674,000 us-gaap_InterestPaidNet |  |  |  |
Income taxes (net of refunds) | 135,393,000 us-gaap_IncomeTaxesPaidNet | 59,899,000 us-gaap_IncomeTaxesPaidNet | 69,760,000 us-gaap_IncomeTaxesPaidNet |  |  |  |
Supplemental Non-Cash Transactions |  |  |  |  |  |  |
Gain on sale of controlling interest in subsidiary | 65,955,000 us-gaap_GainOrLossOnSaleOfStockInSubsidiary |  |  |  |  |  |
Net proceeds from sale of controlling interest in subsidiary | 74,142,000 us-gaap_ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates |  |  |  |  |  |
Non-cash, pay-in-kind interest income and accretion of discount recognized on a note receivable from an affiliate | 15,837,000 seb_PaidInKindInterestIncome | 13,642,000 seb_PaidInKindInterestIncome | 11,936,000 seb_PaidInKindInterestIncome |  |  |  |
Foreign Currency Transactions and Translation |  |  |  |  |  |  |
Number of consolidated subsidiaries using local currency as their functional currency | 2 seb_NumberOfConsolidatedSubsidiariesUsingLocalCurrencyAsFunctionalCurrency |  |  |  |  |  |
Number of non-controlled, non-consolidated affiliates using local currency as their functional currency | 8 seb_NumberOfNonControlledNonConsolidatedAffiliatesUsingLocalCurrencyAsFunctionalCurrency |  |  |  |  |  |
Minimum |  |  |  |  |  |  |
Principles of Consolidation and Investments in Affiliates |  |  |  |  |  |  |
Time lag for reporting financial information of certain foreign subsidiaries and affiliates | 1 month |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |
Useful Lives | 3 years |  |  |  |  |  |
Maximum |  |  |  |  |  |  |
Principles of Consolidation and Investments in Affiliates |  |  |  |  |  |  |
Time lag for reporting financial information of certain foreign subsidiaries and affiliates | 3 months |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |
Useful Lives | 30 years |  |  |  |  |  |
Divestiture of a 50% interest in Daily's |  |  |  |  |  |  |
Supplemental Non-Cash Transactions |  |  |  |  |  |  |
Decrease in net working capital |  |  |  | 21,070,000 seb_WorkingCapitalDecreaseFromDeconsolidation / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Decrease (increase) in investments in and advances to affiliates |  |  |  | (74,142,000)seb_IncreaseDecreaseInInvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Decrease in fixed assets |  |  |  | 16,038,000 seb_TangibleAssetsDecreaseFromDeconsolidation / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Decrease in goodwill |  |  |  | 28,372,000 us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Decrease in other intangible assets, net (not subject to amortization) |  |  |  | 17,000,000 seb_IndefiniteIntangibleAssetsDecreaseFromDeconsolidation / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Decrease in noncontrolling interest |  |  |  | (151,000)us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Gain on sale of controlling interest in subsidiary |  |  |  | 65,955,000 us-gaap_GainOrLossOnSaleOfStockInSubsidiary / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Net proceeds from sale of controlling interest in subsidiary |  |  |  | 74,142,000 us-gaap_ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember |  |  |
Bakery business | Democratic Republic of Congo |  |  |  |  |  |  |
Supplemental Non-Cash Transactions |  |  |  |  |  |  |
Decrease (increase) in investments in and advances to affiliates |  |  |  |  | 26,290,000 seb_IncreaseDecreaseInInvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / invest_InvestmentGeographicRegionAxis = country_CD / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = seb_BakeryBusinessMember |  |
Increase in long-term notes receivable from affiliates |  | 26,290,000 seb_IncreaseDecreaseInNotesReceivableFromAffiliatesNoncurrent / invest_InvestmentGeographicRegionAxis = country_CD / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = seb_BakeryBusinessMember |  |  | 26,290,000 seb_IncreaseDecreaseInNotesReceivableFromAffiliatesNoncurrent / invest_InvestmentGeographicRegionAxis = country_CD / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = seb_BakeryBusinessMember |  |
Percentage of ownership |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / invest_InvestmentGeographicRegionAxis = country_CD / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = seb_BakeryBusinessMember |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / invest_InvestmentGeographicRegionAxis = country_CD / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = seb_BakeryBusinessMember
Pork segment |  |  |  |  |  |  |
Goodwill and Other Intangible Assets |  |  |  |  |  |  |
Goodwill | 12,256,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember | 12,256,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |  |  |  |  |
Supplemental Non-Cash Transactions |  |  |  |  |  |  |
Percentage of ownership | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |
Pork segment | Triumph |  |  |  |  |  |  |
Supplemental Non-Cash Transactions |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  |  | 50.00%seb_PercentageOfOwnershipInterestSold / dei_LegalEntityAxis = seb_TriumphFoodsLlcMember / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |  | 50.00%seb_PercentageOfOwnershipInterestSold / dei_LegalEntityAxis = seb_TriumphFoodsLlcMember / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |
Pork segment | Triumph | Divestiture of a 50% interest in Daily's |  |  |  |  |  |  |
Supplemental Non-Cash Transactions |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  |  | 50.00%seb_PercentageOfOwnershipInterestSold / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember / dei_LegalEntityAxis = seb_TriumphFoodsLlcMember / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |  | 50.00%seb_PercentageOfOwnershipInterestSold / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember / dei_LegalEntityAxis = seb_TriumphFoodsLlcMember / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |
Gain on sale of controlling interest in subsidiary |  |  |  |  |  | 65,955,000 us-gaap_GainOrLossOnSaleOfStockInSubsidiary / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember / dei_LegalEntityAxis = seb_TriumphFoodsLlcMember / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |
Net proceeds from sale of controlling interest in subsidiary |  |  |  |  |  | $ 74,142,000 us-gaap_ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = seb_DivestitureOfPortionOfDailysPremiumMeatsMember / dei_LegalEntityAxis = seb_TriumphFoodsLlcMember / us-gaap_StatementBusinessSegmentsAxis = seb_PorkSegmentMember |

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