Amendment Description Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Entity by Location [Axis] Location [Domain] Derivative, Nonmonetary Notional Amount Nonmonetary notional amount Notional amounts Derivative, Notional Amount Investments Investment [Line Items] Investment [Axis] Investment [Domain] Investment [Table] Investment [Table Text Block] Summary of the amortized cost and estimated fair value of short-term investments for both available-for-sale and trading securities Investment Geographic Region [Axis] Investment Geographic Region [Domain] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization customer relationships Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated other comprehensive loss Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation and amortization Payments to Acquire Businesses, Net of Cash Acquired Acquisition of business, net of cash acquired Total cash paid for majority interest acquired in commodity origination, storage and processing business in Canada Dividends received from affiliates Equity Method Investment, Dividends or Distributions Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts: Inventory Valuation Reserve [Member] Reserve for LIFO Valuation: Amortization of Intangible Assets Amortization expense of amortizable intangible assets Asset-backed Securities [Member] Asset backed debt securities Asset Retirement Obligation [Abstract] Asset Retirement Obligation Asset Retirement Obligation, Accretion Expense Accretion Expense Liability for additional lagoons placed in service Asset Retirement Obligation, Liabilities Incurred Adjustment to existing lagoons Asset Retirement Obligation, Revision of Estimate Asset Retirement Obligation Ending balance Beginning balance Consolidated Balance Sheets Business Acquisition, Cost of Acquired Entity, Purchase Price Consideration for majority interest acquired in commodity origination, storage and processing business in Canada Business Acquisition, Percentage of Voting Interests Acquired Percentage ownership acquired Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents Cash acquired Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets Increase in other long-term assets Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment Increase in fixed assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Interest Paid, Net Interest (net of amounts capitalized) Increase (Decrease) in Inventories Inventories Increase (Decrease) in Receivables Receivables, net of allowance Proceeds from (Repayments of) Short-term Debt Notes payable to banks, net Collateralized Mortgage Obligations [Member] Collateralized mortgage obligations Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock, Shares Authorized Common stock, authorized shares Common Stock, Shares, Outstanding Common stock, outstanding shares Common Stock, Value, Issued Common stock of $1 par value. Authorized 1,250,000 shares; issued and outstanding 1,210,597 and 1,215,879 shares Components of Deferred Tax Assets and Liabilities [Abstract] Components of the net deferred income tax liability Concentration Risk, Percentage Percentage of revenues Concentration Risk by Type [Axis] Concentration Risk Concentration Risk [Line Items] Concentration Risk [Table] Cost of Goods Sold Products Inventory Write-down Inventory write-downs Cost of Revenue [Abstract] Cost of sales and operating expenses: Cost of Revenue Total cost of sales and operating expenses Cost of Services Services Liabilities, Current [Abstract] Current liabilities: Liabilities, Current Total current liabilities Long-term Debt and Capital Lease Obligations, Current Current maturities of long-term debt Current maturities of long-term debt Long-term Debt and Capital Lease Obligations Long-term debt, less current maturities Debt Instrument, Face Amount Cash fee for providing financing Debt Instrument, Interest Rate, Stated Percentage Interest rate on debt instrument (as a percent) Interest rate (as a percent) Debt Instrument [Axis] Debt Instrument Debt Instrument [Line Items] Notes Payable Notes Payable and Long Term Debt Schedule of Long-term Debt Instruments [Table] Deferred Compensation Plan Assets Deferred compensation plan assets included in other current assets Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Costs, Current Deferred costs Deferred Tax Assets, Gross Aggregate deferred income tax assets Deferred Tax Assets (Liabilities), Net Net deferred income tax liability Deferred Tax Assets, Other Other Deferred Tax Assets, Tax Credit Carryforwards Tax credit carry-forwards Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Reserves/accruals Deferred Tax Assets, Valuation Allowance Valuation allowance Deferred Tax Liabilities Aggregate deferred income tax liabilities Deferred Tax Liabilities, Other Other Deferred Revenue, Current Deferred revenue Defined Contribution Plan, Cost Recognized Contribution expense Derivative, Number of Instruments Held Number of derivative agreements entered Derivative Assets Derivatives Asset Derivatives Derivative, by Nature [Axis] Derivative [Line Items] Derivative commodity instruments Derivative [Table] Maximum exposure for guarantees outstanding Guarantor Obligations, Maximum Exposure, Undiscounted Equity Method Investments Disclosure [Text Block] Investments in and Advances to Affiliates and Notes Receivable from Affiliates Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Axis] Income (Loss) from Equity Method Investments Income from affiliates Income from affiliates Proportionate share of income from affiliates Income From Affiliates: Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate change on cash Effective Income Tax Rate, Continuing Operations Effective income tax rate for components of accumulated other comprehensive loss (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Federal income tax rate (as a percent) Income tax rate for foreign currency translation gains and losses (as a percent) Carrying value after write downs in prior years Equity Method Investments Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Excess of carrying value of investment in affiliates over entity's share of affiliates' book value Equity Method Investment, Ownership Percentage Percentage ownership Excess of Replacement or Current Costs over Stated LIFO Value Amount that inventories would have been higher by if the FIFO method had been used FIFO Inventory Amount Total inventories at lower of FIFO cost or market Finite-Lived Intangible Assets [Abstract] Intangibles subject to amortization: Fixed Income Securities [Member] Fixed Income Foreign Currency Transaction [Abstract] Foreign Currency Transactions and Translation Foreign Government Debt Securities [Member] Foreign government debt securities Foreign Foreign Country [Member] Furniture and Fixtures [Member] Office furniture and fixtures Future Amortization Expense, Year Five Future amortization expense year five Future Amortization Expense, Year Four Future amortization expense year four Future Amortization Expense, Year One Future amortization expense year one Future Amortization Expense, Year Three Future amortization expense year three Future Amortization Expense, Year Two Future amortization expense year two Gain (Loss) on Disposition of Assets Loss (gain) from sale of fixed assets Gain on sale of power generating facilities Gain (Loss) on Sale of Property Plant Equipment Gain on sale of assets Geographic Concentration Risk [Member] Individual foreign country Gross Profit Gross income Guarantee of Indebtedness of Others [Member] Debt guarantees of non-consolidated affiliates and third party Impairment of Long-Lived Assets Held-for-use Impairment charge Fixed asset impairment charge Consolidated Statement of Earnings Total income taxes Income Tax Expense (Benefit), Continuing Operations Income Tax Holiday, Income Tax Benefits Per Share Tax savings per diluted earnings per common share (in dollars per share) Income Tax Disclosure [Text Block] Income Taxes Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Accrued interest and penalties on uncertain tax positions Income Taxes Receivable Income taxes receivable Domestic manufacturing deduction Income Tax Reconciliation, Deductions, Qualified Production Activities Income Tax Reconciliation, Foreign Income Tax Rate Differential Foreign tax differences Income Tax Reconciliation, Other Adjustments Other Income Tax Reconciliation, State and Local Income Taxes State income taxes, net of federal benefit Income Tax Reconciliation, Tax Credits Federal tax credits Income Tax Reconciliation, Tax Exempt Income Tax-exempt investment income Income Taxes Paid, Net Income taxes (net of refunds) Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Total intangible assets, net Finite-Lived Customer Relationships, Gross Gross carrying amount customer relationships Finite-Lived Intangible Assets, Net Intangibles subject to amortization, net Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] Intangibles not subject to amortization: Indefinite-Lived Intangible Assets (Excluding Goodwill) Intangible assets not subject to amortization, other than goodwill Interest Expense Interest expense Interest Rate Swap [Member] Interest rate swaps Interest rate exchange agreements Interest rate Inventory, LIFO Reserve LIFO adjustment Inventory, Net Inventories Total inventories Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investments in and advances to affiliates Investment in and Advances to Affiliates: Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments LIFO Inventory Amount Total inventories at lower of LIFO cost or market Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities and Equity Total Liabilities and Stockholders' Equity Total liabilities Line of Credit Facility, Amount Outstanding Notes payable to banks Line of Credit Facility, Maximum Borrowing Capacity Maximum capacity Maximum borrowing capacity Line of Credit [Member] Credit Agreement Line-of-credit Loss Contingencies by Nature of Contingency [Axis] Loss Contingencies [Line Items] Contingencies Loss Contingencies [Table] Machinery and Equipment [Member] Machinery and equipment Margin account Margin Deposit Assets Dividends paid to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Money Market Funds [Member] Money market funds Multiemployer Plan, Period Contributions Contribution expense for multi-employer pension fund, the United Food & Commercial Workers International Union-Industry Pension Fund, which covers certain union employees under a collective bargaining agreement Related Party Transactions, by Related Party [Axis] Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash from operating activities Net Income (Loss) Available to Common Stockholders, Basic Net earnings attributable to Seaboard Nonoperating Income (Expense) Total other income, net Liabilities, Noncurrent Total non-current liabilities Notes Payable to Banks [Member] Notes payable to bank Notes Receivable, Related Parties, Current Receivable from affiliate Notes Receivable, Related Parties, Noncurrent Notes receivable from affiliate Notional Amount of Derivatives Aggregate notional amount Operating Lease Expense [Member] Other operating lease payments Operating Leases, Future Minimum Payments Due [Abstract] Operating Leases 2012 Operating Leases, Future Minimum Payments Due, Current 2016 Operating Leases, Future Minimum Payments, Due in Five Years 2015 Operating Leases, Future Minimum Payments, Due in Four Years 2014 Operating Leases, Future Minimum Payments, Due in Three Years 2013 Operating Leases, Future Minimum Payments, Due in Two Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating Loss Carryforwards Net operating loss carry-forwards (NOLs) Operating Income (Loss) Operating income Net income Operating Income: Net sales Revenues Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other comprehensive income, income tax benefit Other Comprehensive Income (Loss), Tax Unrealized changes in other comprehensive income Other Assets, Current Other current assets Dividends paid Payments of Dividends, Common Stock Payments of Dividends, Noncontrolling Interest Dividends paid to noncontrolling interests Notes receivable issued to affiliate Payments for Advance to Affiliate Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefits Defined benefit pension plan Pension Plans, Defined Benefit [Member] Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Defined Benefit Plan, Actual Return on Plan Assets Actual return on plan assets Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter 2017 - 2021 Defined Benefit Plan, Benefits Paid Benefits paid Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Reconciliation of benefit obligation: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Reconciliation of fair value of plan assets: Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Components of net periodic benefit cost: Deductible contribution to the pension plan Defined Benefit Plan, Contributions by Employer Employer contributions Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Discount rate used to determine obligations (as a percent) Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] Expected future net benefit payments Defined Benefit Plan, Expected Future Benefit Payments in Year One 2012 Defined Benefit Plan, Expected Future Benefit Payments in Year Two 2013 Defined Benefit Plan, Expected Future Benefit Payments in Year Three 2014 Defined Benefit Plan, Expected Future Benefit Payments in Year Four 2015 Defined Benefit Plan, Expected Future Benefit Payments in Year Five 2016 Defined Benefit Plan, Expected Return on Plan Assets Expected return on plan assets Estimated fair value of plan assets Defined Benefit Plan, Fair Value of Plan Assets Fair value of plan assets at beginning of year Fair value of plan assets at end of year Defined Benefit Plan, Funded Status of Plan Funded status Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Net Periodic Benefit Cost Net periodic benefit cost Defined Benefit Plan, Plan Amendments Plan amendments Defined Benefit Plan, Assumptions Used in Calculations [Abstract] Weighted-average assumptions Defined Benefit Plan, Service Cost Service cost Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plan, Benefit Obligation Benefit obligation at beginning of year Benefit obligation at end of year Target allocation and pension plan asset allocation Defined Benefit Plan Disclosure [Line Items] Schedule of Defined Benefit Plans Disclosures [Table] Proceeds from Collection of Advance to Affiliate Principal payments received on long-term notes receivable from affiliate Proceeds from Issuance of Long-term Debt Proceeds from the issuance of long-term debt Net proceeds from disputed sale Proceeds from Divestiture of Businesses Proceeds from Sale of Productive Assets Proceeds from the sale of fixed assets Proceeds from Sale of Short-term Investments Proceeds from the sale of short-term investments Production Related Impairments or Charges Additional charge incurred to earnings in connection with change in business Property, Plant and Equipment, Gross Gross property, plant and equipment Property, Plant and Equipment Property, Plant and Equipment Property, Plant and Equipment, Net Net property, plant and equipment Net property, plant and equipment Payments to Acquire Equity Method Investments Payments to acquire equity method investment Payments to Acquire Interest in Subsidiaries and Affiliates Investments in and advances to affiliates, net Payments to Acquire Property, Plant, and Equipment Capital expenditures Capital expenditures: Payments to Acquire Short-term Investments Purchase of short-term investments Receivables, Net, Current [Abstract] Receivables: Receivables, Net, Current Net receivables Due from affiliates Due from Related Parties, Current Repayments of Long-term Debt Principal payments of long-term debt Repayments of Notes Payable Notes payable to banks, net Payments for Repurchase of Common Stock Repurchase of common stock Retained Earnings (Accumulated Deficit) Retained earnings Revenue from Related Parties Products, sales to affiliates Revenue, Net [Abstract] Net sales: Sales Revenue, Goods, Net Products (includes sales to affiliates of $808,834, $500,265 and $543,066) Other Revenue, Net Other Sales Revenue, Services, Net Service revenues Revenue, Net Total net sales Net sales Schedule of Equity Method Investments [Table Text Block] Schedule of combined condensed financial information of non-controlled, non-consolidated affiliates Inventory Disclosure [Text Block] Inventories Schedule of Long-term Debt Instruments [Table Text Block] Summary of long-term debt Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule II Valuation and Qualifying Accounts Segment Reporting Information [Line Items] Segment Information Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Disclosure [Text Block] Segment Information Selling, General and Administrative Expense Selling, general and administrative expenses Short-term Debt, Weighted Average Interest Rate Weighted average interest rate (as a percent) Short-term Debt, Type [Axis] Investments Short-term Investments [Member] Short-term investments Short-term Investments Short-term investments Total short-term investments, fair value State State and Local Jurisdiction [Member] Consolidated Statement of Cash Flows Consolidated Statement of Changes in Equity Stockholders' Equity and Accumulated Other Comprehensive Loss Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity and Accumulated Other Comprehensive Loss Subordinated Debt [Member] Subordinated loan Carrying value of subordinated debt Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Ownership after increase (as a percent) Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets, Net Supplemental Cash Flow Information [Abstract] Supplemental Non-Cash Transactions Escrow Deposits Related to Property Sales Amount placed in escrow for potential dry dock costs Tax Credit Carryforward, Amount Tax credit carry-forwards Assets, Current [Abstract] Current assets: Assets, Current Total current assets Trade Accounts Receivable, Gross, Current Trading Securities, Change in Unrealized Holding Gain (Loss) Unrealized gain related to trading securities Transportation Equipment [Member] Vessels and vehicles Municipal bonds US States and Political Subdivisions Debt Securities [Member] US Treasury Securities [Member] U.S. Treasury securities U.S. Treasury STRIPS Equity Method Investment, Summarized Financial Information, Liabilities Total liabilities Equity Method Investment, Summarized Financial Information, Assets Total assets Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations Lapse of statute of limitations Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions Decreases for uncertain tax positions of prior years Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities Settlements Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Additions for uncertain tax positions of current year Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Additions for uncertain tax positions of prior years Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits, if recognized, would affect the effective tax rate Unrecognized Tax Benefits Balance at the beginning of the period Balance at the end of the period 2016 Unrecorded Unconditional Purchase Obligation, Due within Five Years Unrecorded Unconditional Purchase Obligation, Due within One Year 2012 Use of Estimates, Policy [Policy Text Block] Use of Estimates Valuation Allowance of Deferred Tax Assets [Member] Allowance for Deferred Tax Assets: Valuation Allowances and Reserves, Balance Balance at beginning of year Balance at end of year Valuation Allowances and Reserves, Charged to Cost and Expense Provision/ charged (credit) to expense Valuation Allowances and Reserves, Deductions Net deductions Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Valuation Allowances and Reserves Type [Axis] Valuation and Qualifying Accounts Disclosure [Table] Warrant [Member] Detachable warrants Weighted Average Cost Inventory Amount Grain, flour and feed at lower of weighted average cost or market Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding (in shares) Common Stock [Member] Common Stock Construction in Progress [Member] Construction in progress Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment Property, Plant and Equipment, Useful Life, Maximum Useful Lives, maximum (in years) Property, Plant and Equipment, Useful Life, Minimum Useful lives, minimum (in years) Property, Plant and Equipment, Useful Life, Average Useful Lives (in years) Land and Land Improvements [Member] Land and improvements Building and Building Improvements [Member] Buildings and improvements Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Changes in the asset retirement obligation Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of the beginning and ending amount of unrecognized tax benefits Variable Rate Demand Obligation [Member] Variable rate demand notes Due within one year Available-for-sale Securities, Debt Maturities, within One Year, Fair Value Total fixed rate securities Available-for-sale Securities, Debt Securities Other Cost of Operating Revenue Other Assets Total Assets Total Assets: Net sales Deferred Revenue, Revenue Recognized Categories of Investments, Marketable Securities, Trading Securities [Member] Trading securities Categories of Investments, Marketable Securities, Available-for-sale Securities [Member] Available-for-sale securities Investment Income, Interest Interest income Equity Method Investment, Summarized Financial Information [Abstract] Combined condensed financial information of the non-controlled, non-consolidated affiliates Other Liabilities, Current Other accrued liabilities Other Liabilities, Noncurrent Other liabilities and deferred credits Concentration Risk by Benchmark [Axis] Loss due to credit risk associated with derivative contracts Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure Income Tax Holiday, Aggregate Dollar Amount Tax savings due to tax holiday Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Deferred Tax Assets, Net, Current Deferred income taxes Deferred Tax Liabilities, Noncurrent Deferred income taxes Fair Value, by Balance Sheet Grouping [Table] Estimate of Fair Value, Fair Value Disclosure [Member] Balance at period end Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Schedule of amortized cost and estimated fair values of investments and long term debt Scenario, Forecast [Member] Estimated Statement [Table] Statement, Scenario [Axis] Derivative Financial Instruments, Liabilities, Fair Value Disclosure Derivatives Liability Derivatives Movement in Valuation Allowances and Reserves [Roll Forward] Movement in valuation and qualifying accounts Assets [Abstract] Assets Statement [Line Items] Statement Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Discount rate used to determine net periodic benefit cost (as a percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Expected return on plan assets (as a percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Long-term rate of increase in compensation levels (as a percent) Fair Value, Inputs, Level 1 [Member] Level 1 Fair Value, Inputs, Level 2 [Member] Level 2 Fair Value, Inputs, Level 3 [Member] Level 3 Unrecognized pension cost Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year Estimated net periodic benefit cost Increase in liabilities due to capital lease Capital Lease Obligations Incurred Increase in fixed assets due to capital lease Capital Leased Assets, Gross Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash from investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash from financing activities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized gain (loss) on investments Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Unrecognized pension cost Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Cash and Cash Equivalents [Member] Cash and cash equivalents Earnings Per Share, Basic Earnings per common share (in dollars per share) Stockholders' Equity, Period Increase (Decrease) Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Total Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Cumulative foreign currency translation adjustment Common Stock, Shares, Issued Common stock, issued shares Deferred Revenue Deferred revenue Other Assets, Noncurrent Other assets Equity Method Investment, Aggregate Cost Purchase price Schedule of Equity Method Investments [Table] Schedule of Equity Method Investment, Equity Method Investee, Name [Axis] Percentage ownership of non-controlled, non-consolidated affiliates Goodwill Goodwill Schedule of Property, Plant and Equipment [Table] Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Property, Plant and Equipment by Type [Axis] Property, plant and equipment Property, Plant and Equipment [Line Items] Other Nonoperating Income (Expense) Miscellaneous, net Total Seaboard stockholders' equity Stockholders' Equity Attributable to Parent Total equity Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance Change in valuation allowance Components of Deferred Tax Assets [Abstract] Deferred income tax assets: Components of Deferred Tax Liabilities [Abstract] Deferred income tax liabilities: Deferred Tax Liabilities, Property, Plant and Equipment Depreciation Income Tax Expense (Benefit) Income tax benefit (expense) Income tax expense (benefit) Foreign Currency Transaction Gain (Loss), before Tax Foreign currency gain, net Short-term Bank Loans and Notes Payable Notes payable to banks US Government Agencies Debt Securities [Member] U.S. Government agency securities Accounts Receivable Accounts Receivable [Member] Loans Receivable [Member] Term loan Statement, Equity Components [Axis] Additional Paid-in Capital [Member] Additional Capital Retained Earnings [Member] Retained Earnings Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Loss Pay-in-kind interest income Repurchase of common stock Repurchase of common stock Stock Repurchased and Retired During Period, Value Common shares repurchased Stock Repurchased and Retired During Period, Shares Other Inventory, Net of Reserves Other Statement, Business Segments [Axis] Statement Geographical [Axis] Comprehensive Income [Member] Comprehensive Income Commitments Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation, Due within Four Years 2015 Unrecorded Unconditional Purchase Obligation, Due within Two Years 2013 Unrecorded Unconditional Purchase Obligation, Due within Three Years 2014 Unrecorded Unconditional Purchase Obligation, Purchases Amount paid under the contract Commitments and Contingencies. Commitments and contingent liabilities Trading Securities, Fair Value Disclosure Fair Value Trading securities Available-for-sale Securities, Fair Value Disclosure Fair Value Available-for-sale securities Dividends, Common Stock Dividends on common stock Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net earnings Net earnings Net Income (Loss) Attributable to Noncontrolling Interest Less: Net loss attributable to noncontrolling interests Less net loss attributable to noncontrolling interest Accrued Income Taxes Income taxes payable Depreciation, Depletion and Amortization Depreciation and amortization Depreciation and Amortization: Other Nontrade Receivables, Current Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity Balance Balance Accounts Payable, Current Accounts payable Accrued compensation and benefits Employee-related Liabilities, Current Deferred compensation plan liability included in other liabilities Deferred Compensation Liability, Classified, Noncurrent Equity Method Investment Summarized Financial Information, Equity Total equity Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Total earnings before income taxes Total earnings before income taxes Inventory, LIFO Reserve, Effect on Income, Net LIFO method increase (decrease) in earnings Assets, Fair Value Disclosure Total Assets Liabilities, Fair Value Disclosure Total Liabilities Net Cash Provided by (Used in) Continuing Operations Net change in cash and cash equivalents Operating Leases, Rent Expense, Net Rental expense for operating leases Available-for-sale Securities, Amortized Cost Basis Amortized Cost Available-for-sale securities Payments for (Proceeds from) Long-term Investments Sale (purchase) of long-term investments Valuation Allowances and Reserves [Domain] Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract] Current amortization expense and future amortization expense Other Operating Activities, Cash Flow Statement Other, net Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents Summary of Significant Accounting Policies Related Party [Domain] Proceeds from Derivative Instrument, Financing Activities Commodity derivative option proceeds Fair Value, Hierarchy [Axis] Fair Value by Measurement Frequency [Axis] Schedule of Change in Asset Retirement Obligation [Table Text Block] Schedule of changes in the asset retirement obligation Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of components of the net deferred income tax liability Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of components of total income taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of reconciliation of computed expected tax expense excluding non-controlling interest to income tax expense (benefit) attributable to continuing operations Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of components of earnings before income taxes Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Inventory, Current [Table Text Block] Summary of inventories Commitments and Contingencies Income Taxes Goodwill and Intangible Assets, Net Fair Value Disclosures [Abstract] Fair Value Inventories Notes Payable and Long-Term Debt Employee Benefits Schedule of Allocation of Plan Assets [Table Text Block] Schedule of asset allocation targets and actual investment composition within the Plans Schedule of assumptions used in determining pension information for plans Schedule of Assumptions Used [Table Text Block] Schedule of net periodic cost of benefits of plans Schedule of Net Benefit Costs [Table Text Block] Schedule of the funded status Schedule of Net Funded Status [Table Text Block] Schedule of amounts not reflected in net periodic benefit cost and included in accumulated other comprehensive income (AOCI) before taxes Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] Long-term Debt, Fair Value Long-term debt Notes Payable and Long-Term Debt Debt and Capital Leases Disclosures [Text Block] Letters of Credit Outstanding, Amount Letters of credit outstanding Trading Securities, Cost Amortized Cost Trading securities Asset Retirement Obligations, Policy [Policy Text Block] Asset Retirement Obligation Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Derivatives, Policy [Policy Text Block] Derivative Instruments and Hedging Activities Consolidation, Policy [Policy Text Block] Principles of Consolidation and Investments in Affiliates Revenue from External Customers by Products and Services [Table Text Block] Summary of specific financial information related to sales to external customer Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Transactions and Translation Goodwill and Intangible Assets, Policy [Policy Text Block] Goodwill and Other Intangible Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment of Long-Lived Assets Income Tax, Policy [Policy Text Block] Income Taxes Inventory, Policy [Policy Text Block] Inventories Investment, Policy [Policy Text Block] Short-Term Investments Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment Receivables, Policy [Policy Text Block] Notes Receivable from Affiliates Trade and Other Accounts Receivable, Policy [Policy Text Block] Accounts Receivable Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Property, Plant and Equipment [Table Text Block] Summary of property, plant and equipment Reconciliation of Assets from Segment to Consolidated [Table Text Block] Summary of specific financial information related to total assets Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Summary of specific financial information related to operating income Summary of Income Tax Contingencies [Table Text Block] Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Schedule of non-cancelable purchase commitments and commitments under other agreements Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of amortized cost and estimated fair values of investments and long term debt Earnings Per Share, Policy [Policy Text Block] Earnings Per Common Share Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Supplemental executive plans and retirement agreements Supplemental Employee Retirement Plans, Defined Benefit [Member] Schedule of amounts in AOCI expected to be recognized as components of net periodic benefit cost in 2012 Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] Concentration Risk Benchmark [Domain] Concentration Risk Type [Domain] Debt Instrument, Name [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Derivative, Name [Domain] Disposal Groups, Including Discontinued Operations, Name [Domain] Equity Component [Domain] Equity Method Investee, Name [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Plan Asset Measurement [Domain] Income Tax Authority [Domain] Long-term Debt, Type [Domain] Loss Contingency, Nature [Domain] Plan Asset Categories [Domain] Property, Plant and Equipment, Type [Domain] Scenario, Unspecified [Domain] Segment [Domain] Segment Geographical [Domain] Short-term Debt, Type [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Stock Repurchase Program, Remaining Authorized Repurchase Amount Remaining authorized repurchase amount under November 2009 share repurchase program Stock Repurchase Program, Authorized Amount Stock repurchase programs, authorized amount Derivatives and Fair Value [Text Block] Derivatives and Fair Value of Financial Instruments Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of components of accumulated other comprehensive loss, net of related taxes Assets, Fair Value Disclosure [Abstract] Assets: Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets and liabilities measured at fair value on a recurring basis and also its level within the fair value hierarchy Liabilities, Fair Value Disclosure [Abstract] Liabilities: Proceeds from Maturities, Prepayments and Calls of Short-term Investments Proceeds from the maturity of short-term investments Investments in and Advances to Affiliates and Notes Receivable from Affiliates Segment Information Schedule II Valuation and Qualifying Accounts Equity Method Investment, Summarized Financial Information, Revenue Net sales Total net sales Range [Axis] Range [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Increase (Decrease) in Other Current Assets Other current assets Derivative Instrument Risk [Axis] Income Tax Authority [Axis] Investments Classified by Contractual Maturity Date [Table Text Block] Summary of estimated fair value of fixed rate securities designated as available-for-sale, classified by the contractual maturity date of the security Investment Type Categorization [Domain] Unrecorded Unconditional Purchase Obligation, Due after Five Years Thereafter Heating Oil [Member] Heating oil Investments in and Advances to Affiliates [Table] Investments in and Advances to Affiliates [Line Items] Investments in and Advances to Affiliates and Notes Receivable from Affiliates Investment Type [Axis] Other Aggregated Investments [Member] Other Corporate Bond Securities [Member] Corporate bonds Exchange traded funds-fixed income Exchange Traded Funds [Member] Fixed Income Funds [Member] Fixed income mutual funds Fixed income mutual funds Derivatives, Fair Value [Line Items] Amount of gain or (Loss) recognized for each type of derivative and it's location in the Consolidated Balance Sheet Foreign Exchange Contract [Member] Foreign currency exchange agreements Foreign currencies Commodity Contract [Member] Commodities Commodity contracts Revenues Total sales Sales [Member] Cost of Sales [Member] Cost of sales-products Foreign Currency Gain (Loss) [Member] Foreign currency Income Statement and Other Comprehensive Income (Loss) Location [Domain] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Schedule of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statement of Earnings Derivative Instruments, Gain (Loss) [Line Items] Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statement of Earnings Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) Recognized in Income, Net Amount of Gain or (Loss) Recognized in Income on Derivatives Net realized and unrealized gains on derivatives Derivative Contract Type [Domain] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of fair value of each type of derivative and its location in the Consolidated Balance Sheets Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Noncontrolling Interest [Member] Noncontrolling Interest Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net earnings to cash from operating activities: Long-term Debt, Type [Axis] Defined Benefit Plan by Plan Asset Categories [Axis] Defined Benefit Plan, Fair Value of Plan Assets by Measurement [Axis] Accrued pension liability Defined Benefit Pension Plan, Liabilities, Noncurrent Segment, Geographical, Groups of Countries, Group One [Member] Caribbean, Central and South America Segment, Geographical, Groups of Countries, Group Two [Member] Africa Comprehensive income: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' equity: Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations before Extraordinary Items Operating income (loss) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] Components of earnings before income taxes Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract] Amounts not reflected in net periodic benefit cost and included in accumulated other comprehensive income (AOCI) before taxes Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract] Amounts in AOCI expected to be recognized as components of net periodic benefit cost in 2012 Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax Accumulated loss, net of gain Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax Prior service cost, net of credit Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Transition Assets (Obligations), before Tax Transitional obligation Revenue from External Customers Sales to External Customers: Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Components of accumulated other comprehensive loss, net of related taxes Business Acquisition, Purchase Price Allocation, Deferred Income Taxes, Asset (Liability), Net Increase in deferred tax liabilities Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities, net of business acquired: Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of total income taxes Current Federal Tax Expense (Benefit) Federal Current Foreign Tax Expense (Benefit) Foreign Current Income Tax Expense (Benefit) [Abstract] Current: Current State and Local Tax Expense (Benefit) State and local Deferred Federal Income Tax Expense (Benefit) Federal Deferred Foreign Income Tax Expense (Benefit) Foreign Deferred Income Tax Expense (Benefit) [Abstract] Deferred: Deferred State and Local Income Tax Expense (Benefit) State and local Income (Loss) from Continuing Operations before Income Taxes, Domestic United States Income (Loss) from Continuing Operations before Income Taxes, Foreign Foreign Gain on disputed sale, net of expenses Gain on disputed sale, net of expenses Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] Reconciliation of computed expected tax expense excluding non-controlling interest to income tax expense (benefit) attributable to continuing operations Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate Computed expected tax expense excluding non-controlling interest Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Nonoperating Income (Expense) [Abstract] Other income (expense): Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income net of income tax benefit of $12,604, $5,443 and $3,206 for the years ended 2011, 2010 and 2009, respectively: Unrealized gain (loss) on investments Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Payments for (Proceeds from) Other Investing Activities Other, net Proceeds from (Payments for) Other Financing Activities Other, net Defined Benefit Plan, Actuarial Net (Gains) Losses Actuarial losses Defined Benefit Plan, Amortization of Net Gains (Losses) Accumulated loss, net of gain Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) Prior service cost, net of credit Defined Benefit Plan, Amortization of Net Transition Asset (Obligation) Transition obligation Equity Method Investment, Summarized Financial Information, Net Income (Loss) Net income Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Foreign Currency Transaction Gain (Loss), Unrealized Foreign currency exchange (gain) loss Operating Segments [Member] Segment Totals All Other Segments [Member] All Other Unallocated Amount to Segment [Member] Corporate Schedule of Revenues from External Customers and Long-Lived Assets [Table] Revenues from External Customers and Long-Lived Assets [Line Items] Geographic Information Long-Lived Assets Long-lived assets Fair Value, Measurements, Recurring [Member] Recurring basis Other Debt Obligations [Member] Other debt securities Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract] Estimated fair value of fixed rate securities designated as available-for-sale, classified by the contractual maturity date of the security Derivatives and Fair Value of Financial Instruments Increase (Decrease) in Current Liabilities Exclusive of Debt, Current Current liabilities, exclusive of debt The increase (decrease) during the reporting period in the aggregate amount of liabilities resulting from activities that generate operating income. This element specifically excludes the net change in debt. Interest Income from Affiliates Interest income from affiliates Represents the interest income from affiliates earned by the entity during the reporting period. Document and Entity Information Other Investment Income (Expense), Net Other investment income, net Other investment income, net Represents the other investment income expense, net earned by the entity during the reporting period. Deferred Revenue from Affiliates, Current Deferred revenue from affiliates Amount of deferred revenue from affiliates as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Paid-in-Kind Interest Income Pay-in-kind interest and accretion on note receivable from affiliate Interest received other than in cash for example on a note receivable from an affiliate. As a noncash item, it is subtracted from net income when calculating cash provided by or used in operations using the indirect method. Non-cash, pay-in-kind interest income and accretion of discount recognized on a note receivable from an affiliate Pay-in-kind interest income recognized on notes receivable from affiliates Other Noncash Income (Expense) and Other Items Other Other income (expense) included in net income that result in no cash inflows or outflows in the period, plus other items, such as affiliate dividends that result in cash inflows or outflows in the period but are not included in Net Income. These items are necessary to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. Proceeds from Sale of Power Generating Facilities Proceeds from the sale of power generating facilities The cash inflow from the sale of a property, plant, and equipment asset that was used in the normal conduct of business to generate power for sale. Amount received by the entity on sale of floating power generating facilities Noncontrolling Interest Increase from Business Combination Decrease from Deconsolidation Addition of noncontrolling interests Represents the increase in noncontrolling interest balance because of business combination and the reduction or elimination during the period of a noncontrolling interest resulting from the parent's loss of control and deconsolidation of the entity. Gross receivable Accounts Receivable Trade Due from Parties and Other Receivable, Current Represents the amounts due from customers or clients along with the sum of amount currently receivable other than from customers and from related parties within one year of the balance sheet date that have been delivered or sold in the normal course of business. Allowance for doubtful accounts Allowance for Doubtful Accounts Trade Due from Parties and Other Receivable, Current Represents the valuation allowance for 3rd party trade receivables, due from related parties and other receivables due to the entity within one year that is expected to be uncollectible. Proceeds from syndication and subordinated loan fees Proceeds from Syndication and Subordinated Loan Fees Represents the proceeds from syndication and subordinated loan fees. Other Available-for-sale Securities [Member] Other Represents information pertaining to investments in available-for-sale securities which are not otherwise provided for in the existing taxonomy in the form of Domain Members or individual elements. High Yield Trading, Debt Securities [Member] High yield trading debt securities Represents high yield debt securities that are bought and held principally for the purpose of selling in the near term (thus held for only a short period of time). Other Trading Debt Securities [Member] Other trading debt securities Represents other than high yield debt securities that are bought and held principally for the purpose of selling in the near term (thus held for only a short period of time). Available-for-Sale Securities, Debt Maturities after Three Years, Fair Value Due after three years Represents the fair value of debt securities which are expected to mature after three years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. Property, Plant and Equipment, Operating Period Period of plant operation (in years) Represents the period during which the plant is in operation. Income Tax Reconciliation [Abstract] Adjustments to tax expense attributable to: Income Tax Reconciliation, Change in Pension Deferred Tax Change in pension deferred tax The portion of difference between the total income tax expense or benefit as reported in the Income Statement for the year/accounting period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to change in pension deferred tax. Income (Loss) from Continuing Operations before Income Taxes Total earnings excluding non-controlling interest The portion of earnings or loss from continuing operations before income taxes excluding non-controlling interest. Cash basis farming adjustment Deferred Tax Liabilities, Cash Basis Farming Adjustment The amount as of the balance sheet date of the estimated future tax effects attributable to differences between the methods used to account for farming transactions for tax purposes and under generally accepted accounting principles, which will increase future taxable income when such differences reverses. Deferred Tax Assets, Net Operating and Capital Loss Carryforwards The tax benefit as of the balance sheet date from the allowable deduction of operating and capital losses against future taxable income realized within the applicable carryforward periods. Net operating and capital loss carry-forwards Undistributed Earnings of Foreign Subsidiaries Represents the undistributed earnings of international subsidiaries on which Federal income and foreign withholding taxes have not been provided. Undistributed earnings from foreign operations Income Tax Holiday, Number of Foreign Countries Number of foreign countries in which the entity had a tax holiday Represents the number of foreign countries in which entity has a tax holiday. Lower of LIFO Cost or Market [Abstract] At lower of LIFO cost or market: Inventory Live Hogs and Materials before LIFO Adjustment, Net of Reserve Live hogs and materials Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date, of live hogs and materials, before LIFO adjustment. Inventory Fresh Pork and Materials before LIFO Adjustment, Net of Reserve Fresh pork and materials Carrying amount of fresh pork and materials, net of valuation reserve and adjustment and before LIFO adjustment, as of the balance sheet date. Lower of FIFO Cost or Market [Abstract] At lower of FIFO cost or market: Inventory, Grains and Oilseeds, Net of Reserves Grains and oilseeds Carrying amount, net of valuation reserve and adjustment, as of the balance sheet date of grains and oilseeds. Inventory, Sugar Produced and in Process, Net of Reserves Sugar produced and in process Carrying amount, net of valuation reserve and adjustment, as of the balance sheet date of sugar produced and in process. Represents the increase (decrease) in net earnings per share due to the effect of LIFO inventory method. LIFO method increase (decrease) in earnings per share (in dollars per share) Inventory, LIFO Reserve, Effect on Income, Net, Per Share Commodity Trading Business Inventories Committed to Foreign Customers Grain inventories related to commodity trading business committed to foreign customers Represents the inventories related to commodity trading business that are committed to various customers in foreign countries, for which customer contract performance is a heightened concern. Inventory Write-down, Per Share The per share amount of the write-down to the carrying amount of inventory, which was attributable to customer contract performance. Inventory write-downs (in dollars per share) Schedule of Finite and Indefinite-Lived Intangible Assets [Table Text Block] Schedule of intangible assets Tabular disclosure of the carrying value of finite and indefinite-lived intangible assets, excluding goodwill, in total and by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of the company. Schedule of Goodwill and Indefinite-Lived Intangible Assets by Segment [Table] Schedule of goodwill and indefinite-lived intangible assets in total and by segment. Pork Segment [Member] Pork segment Represents the Pork segment of the entity. Pork Goodwill and Indefinite-Lived Intangible Assets by Segment [Line Items] Goodwill and intangible assets Operating Loss and Tax Credit Carryforwards [Table] Schedule reflecting pertinent information, such as tax authority, amounts, and expiration dates, of net operating loss carryforwards and tax credit carryforwards. Net operating loss carry-forwards and tax credit carry-forwards Operating Loss and Tax Credit Carryforwards [Line Items] Deferred Tax Assets Tax Credit Carryforwards Foreign Minimum Tax Foreign minimum tax credit carry-forward The tax benefit as of the balance sheet date from the reduction by tax credit carryforwards of future foreign income tax within applicable carryforward periods; a tax credit carryforward is the amount by which an alternative tax exceeded the normal income tax liability and can only be utilized if sufficient taxable income is generated in future periods and provided tax laws continue to allow such utilization. Short-term Investments at Amortized cost Total short-term investments, amortized cost This item represents a parenthetical disclosure of the amortized cost of securities classified as short-term investments. Accrued Self Insurance [Policy Text Block] Disclosure of accounting policy for accrued self-insurance cost. Accrued Self-Insurance Deferred Grants [Policy Text Block] Deferred Grants Disclosure of accounting policy for deferred grants. Schedule of Amounts Paid for Interest and Income Taxes [Table Text Block] Schedule of amounts paid for interest and income taxes Tabular disclosure of amount paid for interest and income taxes. Operations and Subsidiaries [Abstract] Operations of Seaboard Corporation and its Subsidiaries Subsidiaries and Affiliates Reporting Period Lag Minimum Minimum time lag for reporting financial information of certain subsidiaries and affiliates (in months) Represents the minimum time lag for reporting financial information of subsidiaries and affiliates. Subsidiaries and Affiliates Reporting Period Lag Maximum Maximum time lag for reporting financial information of certain subsidiaries and affiliates (in months) Represents the maximum time lag for reporting financial information of subsidiaries and affiliates. Butterball LLC [Member] Butterball, LLC Represents the information pertaining to Butterball, LLC. PSI International [Member] PSI International Represents the information pertaining to PSI International. Deferred Grants [Abstract] Deferred Grants Deferred Grants Deferred Grants Amount of deferred grants as of the balance sheet date. Deferred grants represent economic development funds contributed by government entities, usage of which is limited for certain activities. Business Acquisition Purchase Price Allocation Working Capital Increase in working capital The amount of acquisition cost of a business combination allocated to working capital. Number of Non Controlled Non Consolidated Affiliates Using Local Currency as Functional Currency Number of non-controlled, non-consolidated affiliates using local currency as their functional currency Represents number of non-controlled, non-consolidated affiliates using local currency as their functional currency. CONGO, THE DEMOCRATIC REPUBLIC OF THE Democratic Republic of Congo LESOTHO Lesotho KENYA Kenya NIGERIA Nigeria ZAMBIA Zambia COLOMBIA Colombia ECUADOR Ecuador HAITI Haiti AUSTRALIA Australia PERU Peru ARGENTINA Argentina Poultry Business [Member] Poultry business Represents the information pertaining to poultry business. Bakery Business [Member] Bakery business Represents the information pertaining to bakery business. Commodity Trading and Milling [Member] Commodity Trading and Milling Represents the Commodity Trading and Milling segment of the entity. Sugar [Member] Sugar Represents the Sugar segment of the entity. Turkey [Member] Turkey Represents the Turkey segment of the entity. Equity Method Investment, Ownership Percentage of Investee Held by Third Party Percentage of ownership interest continued to be owned by the Maxwell Group Represents the ownership percentage of the equity method investee held by the co-owner. Term of Loan Receivable Maturity period of unsecured subordinated loan provided (in years) Represents the period after which the loan receivable of the entity will mature. Loans Receivable, Interest Rate Interest rate on loan provided (as a percent) Represents the aggregate stated interest rate on the loan receivable. Loans Receivable Interest Rate, Payable in Cash Percentage of interest payable in cash Represents the stated interest rate on the loan receivable that is payable in cash. Loans Receivable Interest Rate, Payable in Kind Percentage of pay-in-kind interest Represents the stated interest rate on the loan receivable that is payable in kind. Equity Method Investment Warrants, Additional Equity Interest that Can be Acquired Additional equity interest that can be acquired upon exercise of warrants (as a percent) Represents the additional equity interest in the equity method investee which can be acquired by the entity upon exercise of warrants. Equity Method Investment, Economic Interest Economic interest (as a percent) Represents the percentage of economic ownership in an equity method investee, which is higher than the percentage of voting interest due to warrants held by the entity. Percentage of Syndication Fee, Initially Recognized as Income Percentage of net syndication fee initially recognized as income Represents the percentage of the syndication fee income initially recognized as income by the entity, as this is the percentage of the economic interest in the equity method investee that is not controlled by the entity. Equity Method Investment, Additional Investment Additional investment or capital contribution Represents an additional amount of investment made in equity method investee during the period. Estimated Cost of Project Estimated project cost Represents the estimate of the total project cost. Number of Assets Sold Number of asset sales Represents the number of assets sold during the period. LIFO Inventory before LIFO Adjustment, Net of Reserve Inventories at lower of LIFO cost or market, Gross The amount of LIFO (last in first out) inventory, net of valuation reserve and adjustment, before LIFO adjustment. Mexico Ham Boning and Processing Plant [Member] Operations of the ham boning and processing plan located in Mexico. Mexico ham boning and processing plant Indefinite-Lived Trade names and Trademarks Carrying amount-trade names and registered trademarks Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit and rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit. Municipal Notes and Bonds [Member] Short-term and long-term debt securities issued by state, city or local governments or the agencies operated by state, city or local governments. Fixed rate municipal notes and bonds Available-for-Sale Securities, Debt Maturities after One Through Three Years, Fair Value Represents the fair value of debt securities which are expected to mature after one year and through three years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. Due after one year through three years Investments by Denomination [Axis] Information pertaining to investments disaggregated by the currency in which the investments are denominated. Euro Member Countries, Euro Denominated in Euros LIFO The tax effect as of the balance sheet date of the difference in the cost of LIFO inventory determined under tax rules from that determined for financial reporting purposes that will be recognized in future periods when the inventory is sold. Deferred Tax Liabilities, Inventory Costs Deferred Tax Assets, Deferred Income, Foreign Earnings The tax effect as of the balance sheet date of the difference in the carrying amount for tax and financial accounting purposes of non-US operations subject to current US federal income tax that will reverse in future periods as the related assets are realized and liabilities are settled. Deferred earnings of foreign subsidiaries Committed Line of Credit [Member] Committed bank line A credit facility whereby terms and conditions are clearly defined by the lending institution and imposed upon the borrowing entity. Uncommitted Line of Credit [Member] Uncommitted bank lines A credit facility with no restrictions placed upon the lending institution regarding the amount of funds to be lent. Debt Instrument Senior Notes 6.21 Percent Due 2011 Through 2012 [Member] 6.21% senior notes, due 2012 Represents information pertaining to 6.21 percent senior notes, due 2011 through 2012. Debt Instrument Senior Notes 6.92 Percent Due 2012 [Member] 6.92% senior notes, due 2012 Represents information pertaining to 6.92 percent senior notes, due 2012. Bonds Payable [Member] Industrial Development Revenue Bonds, floating rates (1.27% - 2.10% at December 31, 2011) due 2014 through 2027 A debt obligation, in which the authorized issuer owes the holders a debt and is obliged to repay the principal and interest (the coupon) at a later date. Foreign Subsidiary Obligation at Floating Rate Argentine Pesos [Member] Foreign subsidiary obligation, floating rate Represents the foreign subsidiary obligation with a floating interest rate that is payable in Argentine pesos. Capital Lease Obligations and Other [Member] Capital lease obligations and other Represents the information pertaining to capital lease obligations and other long term debt. Letters of Credit Outstanding Amount for Industrial Development Revenue Bonds Letters of credit for outstanding IDRBs The total amount by which the borrowing capacity was reduced under letters of credit outstanding as of the reporting date for outstanding Industrial Development Revenue Bonds (IDRB's). Letters of Credit Outstanding Amount Related to Insurance Coverages Letters of credit related to insurance coverages The total amount by which the borrowing capacity was reduced under letters of credit outstanding as of the reporting date related to insurance coverages. Debt Instrument, Covenant Maximum Funded Debt as Percentage of Aggregate Capitalization Maximum consolidated funded debt as a percentage of aggregate capitalization Represents the maximum consolidated funded debt as a percentage of aggregate capitalization allowed per the terms of the debt covenants. Debt Instrument, Covenant Adjusted Leverage Ratio Numerator Maximum Numerator for adjusted leverage ratio, maximum Represents the numerator for the maximum adjusted leverage ratio per the terms of the debt covenants. Debt Instrument, Covenant Adjusted Leverage Ratio Denominator Maximum Denominator for adjusted leverage ratio, maximum Represents the denominator for the maximum adjusted leverage ratio per the terms of the debt covenants. Debt Instrument, Covenant Minimum Net Worth Requirement Base Amount Minimum net worth base requirement Represents the base amount that is used in the calculation of minimum tangible net worth requirement per the terms of the debt covenants. Debt Instrument, Covenant Percentage of Consolidated Net Income Added to Minimum Net Worth Requirement Percentage of consolidated net income added to net worth base amount Represents the percentage of the consolidated net income that is used in the calculation of the minimum net worth requirement per the terms of the debt covenants. Debt Instrument, Covenant Dividend Restriction Base Amount Base amount used to calculate maximum dividend allowed Represents the base amount used in determining the maximum dividend to be paid per the terms of the debt covenants. Debt Instrument, Covenant Dividend Restriction Percentage of Consolidated Net Income Added to Base Amount Percentage of consolidated net income added to base dividend amount Represents the percentage of consolidated net income added to the base amount of dividends per the terms of the debt covenants. Debt Instrument, Covenant Dividend Restriction Percentage of Consolidated Net Losses Deducted from Base Amount Percentage of consolidated net losses deducted from base dividend amount Represents the percentage of consolidated net losses deducted from the base amount of dividends per the terms of the debt covenants. Debt Instrument, Covenant Dividend Restriction Net Proceeds of Capital Stock Added to Base Amount Net proceeds of capital stock added to base dividend amount Represents the net proceeds of capital stock added to the base amount of dividends per the terms of the debt covenants. Debt Instrument, Covenant Dividend Restriction Maximum Amount Maximum amount of dividends Represents the maximum amount of dividends to be paid per the terms of the debt covenants. Debt Instrument, Covenant, Sum of Subsidiary Indebtness and Priority Indebtness as Percentage of Net Worth, Maximum Sum of subsidiary indebtedness and priority indebtedness as a percentage of consolidated tangible net worth, maximum Represents the maximum percentage of the sum of subsidiary indebtedness and priority indebtedness as a percentage of net worth allowed per the terms of the debt covenants. Domestic Equity Securities [Member] Domestic equity securities Represents the domestic equity securities. Foreign Equity Securities [Member] Foreign equity securities Represents the foreign equity securities. International/foreign equity securities Derivative Financial Instruments Liabilities Fair Value Disclosure Net of Proceeds from Derivatives Derivatives net liability Represents the fair value of derivative liabilities net of any proceeds from derivative instruments. Amortized Cost [Abstract] Amortized Cost Commodity Purchase Contract [Member] Net commodity purchase contracts Derivative instrument whose primary underlying risk is tied to the purchase of commodities. Commodity Sale Contract [Member] Net commodity sale contracts Derivative instrument whose primary underlying risk is tied to the sale of commodities. Grain [Member] Grain Represents the derivative instrument whose primary underlying risk is tied to grain. Soybean Meal [Member] Soybean meal Represents the derivative instrument whose primary underlying risk is tied to soybean meal. Hogs [Member] Hogs Represents the derivative instrument whose primary underlying risk is tied to hogs. Term of Derivative Contract Term of derivative contract (in years) Represents the term of the derivative contract entered into by the entity. Derivative Credit Risk Number of Counterparties Number of counterparties Represents the number of counterparties with respect to whom the entity has counterparty credit risk related to derivative contracts. Percentage of Ownership Interest by Parent Percentage of ownership interest held by Seaboard Flour LLC and SFC Preferred LLC (Parent Companies) Represents the percentage of ownership interest in the entity held by the parent company. Business Acquisition Purchase Price Allocation Minority Interest The amount of acquisition cost of a business combination allocated to noncontrolling interest. Increase in non-controlling interest Consolidation and Investments in Affiliates [Abstract] Principles of Consolidation and Investments in Affiliates All Currencies [Domain] Term Note [Member] Term note Represents the details of the term note. Foreign Subsidiaries [Member] Represents details pertaining to the foreign subsidiaries of the entity. Foreign subsidiaries All Currencies [Axis] Represents the set of currencies. South Africa, Rand South African Rand Notes Payable to Bank Maximum Repayment Term Represents the maximum repayment term of notes payable to banks. Maximum repayment term (in years) Long-term Debt and Capital Lease Obligations by Maturity [Abstract] Maturities of long-term debt Long-term Debt and Capital Lease Obligations Maturities Repayments of Principal in Next Twelve Months Amount of long-term debt and capital lease obligations maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements. 2012 Long-term Debt and Capital Lease Obligations Maturities Repayments of Principal in Year Three Amount of long-term debt and capital lease obligations maturing in year three following the date of the latest balance sheet presented in the financial statements. 2014 Long-term Debt and Capital Lease Obligations Maturities Repayments of Principal in Year Two Amount of long-term debt and capital lease obligations maturing in year two following the date of the latest balance sheet presented in the financial statements. 2013 Long-term Debt and Capital Lease Obligations Maturities Repayments of Principal in Year Four Amount of long-term debt and capital lease obligations maturing in year four following the date of the latest balance sheet presented in the financial statements. 2015 Long-term Debt and Capital Lease Obligations Maturities Repayments of Principal in Year Five Amount of long-term debt and capital lease obligations maturing in year five following the date of the latest balance sheet presented in the financial statements. 2016 Long-term Debt and Capital Lease Obligations Maturities Repayments of Principal after Year Five Amount of long-term debt and capital lease obligations maturities after year five following the date of the latest balance sheet presented in the financial statements. Thereafter Grain Trading Business [Member] Grain and commodity trading businesses Represents the information pertaining to grain trading businesses. Sugar Related Business [Member] Sugar related businesses Represents the information pertaining to sugar related businesses. Loan Provided to Equity Method Investee, Original Principal Amount The original principal amount of the loan provided to equity method investee. Loan provided to affiliate Amortization Period of Remaining Syndication Fee Amortization period of remaining net syndication fee (in years) Represents the term of the investee's debt, which is the amortization period of the remaining syndication fees that were not recognized initially by the entity. Number of Business Number of businesses Represents the number of businesses. Loan to Equity Method Investee, Proceeds from Loan Fee Cash fee received as consideration for unsecured subordinated loan provided Represents the proceeds from loan fee on loan made to equity method investee. Syndication Fee Received from Investee Represents the net syndication fee received from equity method investee relating to entity's arrangement of refinancing of investee's debt. Cash syndication fee Marine [Member] Marine Represents the Marine segment of the entity. Guarantees Outstanding Number of Third Parties Number of third parties to whom guarantees are outstanding Represents the number of third parties to whom guarantees are outstanding. Hog procurement contracts Represents the contractual obligation to procure hog over periods that initially exceed one year or the normal operating cycle, if longer. Hog Procurement Contracts [Member] Grain and feed ingredients Represents the contractual obligation to procure grain and feed ingredients over periods that initially exceed one year or the normal operating cycle, if longer. Grain and Feed Ingredients [Member] Grain purchase contracts for resale Represents the contractual obligation to procure grain purchase contracts for resale over periods that initially exceed one year or the normal operating cycle, if longer. Grain Purchase Contracts for Resale [Member] Construction of new power barge Represents the contractual obligation to construct new power barge over periods that initially exceed one year or the normal operating cycle, if longer. Construction of New Power Barge [Member] Fuel purchase contract Represents the contractual obligation to procure fuel over periods that initially exceed one year or the normal operating cycle, if longer. Fuel Purchase Contract [Member] Equipment purchases and facility improvements Represents the contractual obligation to procure equipment and improve facilities over periods that initially exceed one year or the normal operating cycle, if longer. Equipment Purchases and Facility Improvements [Member] Other purchase commitments Represents the contractual obligation to procure other items over periods that initially exceed one year or the normal operating cycle, if longer. Other Purchase Commitments [Member] Vessel, time and voyage-charter Arrangements Represents the contractual obligation under vessel, time and voyage-charter arrangements over periods that vary from a few months to one year or the normal operating cycle, if longer. Vessel Time and Voyage Charter Arrangements [Member] Contract grower finishing agreements Represents the contractual obligation under contract grower finishing agreements over periods that initially exceed one year or the normal operating cycle, if longer. Contract Grower Finishing Agreements [Member] Power [Member] Power Represents the Power segment of the entity. Agent Concentration Risk [Member] Agent Reflects the percentage that revenues in the period from one or more significant agents is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effect of loss of a significant agent. Schedule of Revenues from External Customers by Geographical Areas [Table Text Block] Geographic summary of net sales based on the location of product delivery Tabular disclosure of information concerning the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. Schedule of Long-Lived Assets by Geographical Areas [Table Text Block] Geographic summary of the entity's long-lived assets according to their physical location and primary port for the vessels Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets) located in identified geographic areas. An entity may also provide subtotals of geographic information about groups of countries. Reporting Segments, Number Number of reportable segments The number of reportable segments of the entity. Number of Barges on which System of Diesel Engines are Mounted Number of barges on which system of diesel engines are mounted Represents the number of barges on which the system of diesel engines are mounted. Concentration Risk Number Number of agents For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration number derived from the division. Number of Floating Power Generating Facilities Sold Number of floating power generating facilities sold Represents the sale consideration of the floating power generating facilities sold during the period. Consideration for Sale of Floating Power Generating Facilities Consideration for sale of floating power generating facilities Represents the sale consideration for sale of floating power generating facilities. Escrow Earnings Escrow earnings Represents the escrow earnings for the period. Capacity of Floating Power Generating Facility Leased Capacity of EDM leased (in megawatts) Represents the capacity of the floating power generating facilities leased. Capacity of Floating Power Generating Facility Newly Constructed Capacity of floating power generating facility newly constructed (in megawatts) Represents the capacity of the floating power generating facility which is newly constructed during the period. Floating Power Generating Facility Cost of Construction Approximate construction cost of new floating power generating facility Represents the construction cost of the new floating power generating facility. Threshold for Disclosure, Percentage Threshold percentage which the entity uses for disclosure of concentration of risk Threshold percentage which the entity uses for disclosure. UNITED STATES United States Segment Geographical Groups of Countries Group Three [Member] Canada/Mexico A third specified group of foreign countries about which segment information is provided by the entity. Segment Geographical Groups of Countries Group Four [Member] Pacific Basin and Far East A fourth specified group of foreign countries about which segment information is provided by the entity. Segment Geographical Groups of Countries Group Five [Member] Eastern Mediterranean A fifth specified group of foreign countries about which segment information is provided by the entity. Segment Geographical Groups of Countries Group Six [Member] Europe A sixth specified group of foreign countries about which segment information is provided by the entity. DOMINICAN REPUBLIC Dominican Republic All Other Countries [Member] All Other Represents information pertaining to other countries not disclosed elsewhere in the taxonomy. Segment Reporting, Net Assets, Denominated in ARS Net assets of Sugar segment denominated in Argentine pesos Represents net assets of the reportable segment denominated in Argentine pesos. Represents net liabilities of the reportable segment denominated in United States dollars. Segment Reporting, Net Liabilities, Denominated in USD Net liabilities of Sugar segment denominated in U.S. dollars Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans Related to Employees at Subsidiaries Unrecognized pension cost related to employees at certain subsidiaries The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining related to employees at certain subsidiaries, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. SOUTH AFRICA South Africa Schedule of Fair Value of Plan Assets [Table Text Block] Schedule of Plans' assets measured at fair value Tabular disclosure of the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. Domestic Large Cap Equity Securities [Member] Domestic Large Cap Equity This category includes investments in domestic large-cap companies. Domestic Small and Mid Cap Equity Securities [Member] Domestic Small and Mid Cap Equity This category includes investments in domestic, small and mid-cap companies. Alternative Investments [Member] Alternative investments This category includes the alternative investments of plan assets. Collective Investment Funds [Member] Collective investment funds This category includes investment in collective investment funds. Emerging Markets Equity [Member] Emerging markets - equity Represents emerging markets equity, for which information is being disaggregated. Equity Mutual Funds [Member] Mutual funds-equities Represents the investment in equity mutual funds. Real Estate Mutual Funds [Member] Real estate mutual fund Represents the investment in real estate mutual funds. Exchange Traded Fixed Income Funds [Member] Emerging markets - fixed income An investment that pools funds from many investors to invest in a combination of underlying investments, primarily fixed income investments and follows an index, commodity or basket of assets that trade on a stock exchange. Other Plan Assets [Member] Other Represents investment in plan assets not otherwise specified in the taxonomy. Defined Benefit Plan by Difference [Axis] This element represents the funded status of defined benefit plans as a difference between the fair value of assets and the benefit obligation. Difference of Assets and Obligation [Domain] This element represents the difference between the fair value of assets and the benefit obligations. Assets Exceeding Accumulated Benefit Obligation [Member] Assets exceed Accumulated benefits This element represents the excess of the fair value of plan assets over the accumulated benefit obligations. Accumulated Benefit Obligation Exceeding Assets [Member] Accumulated benefits exceed assets This element represents the excess of the accumulated benefit obligations over the fair value of plan assets. Defined Benefit Plan, Eligibility for Participation Requisite Service Period after Attaining Specified Age Requisite service period upon attaining age of 21 to be eligible for participation (in years) The minimum period that the individual is required to perform services in order to be eligible for participation under the defined benefit plan. Defined Benefit Plan, Eligibility for Participation Requisite Age of Employees Requisite age of employees to be eligible for participation (in years) The minimum age of individual required in order to be eligible for participation under the defined benefit plan. Defined Benefit Plan, Target Allocation Percentage of Assets Target Allocations (as a percent) Target allocation percentage of investments to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. Defined Benefit Plan, Actual Allocation Percentage of Assets Actual Composition of Plans (as a percent) Actual allocation percentage of investments to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. Defined Benefit Plan, Plan Split Benefit Obligation Plan split The amount of increase or decrease in benefit obligation due to plan split. Defined Benefit Plan, Plan Split Plan Assets Plan split The amount of increase or decrease in plan assets due to plan split. Amortization and other Defined Benefit Plan, Amortization and Other Costs The amount of gains or losses and any other periodic costs associated with defined benefit plans that are not separately disclosed, recognized in net periodic benefit cost. Schedule of Defined Contribution Plans Disclosures [Table] Disclosures about an individual defined contribution plan. Defined Contribution Plans Disclosures [Axis] Reflects the description and required disclosures pertaining to the entity's defined contributions plans. Defined Contribution Plans [Domain] Represents the information pertaining to defined contribution plan. Defined Contribution Plan, Covering Domestic Salaried and Clerical Employees [Member] Defined contribution plan covering domestic, salaried and clerical employees Represents the defined contribution plan covering domestic, salaried and clerical employees. Defined Contribution Plan, Covering Hourly Non Union Daily Employees [Member] Defined contribution plan covering hourly, non union and Daily's employees Represents the defined contribution plan covering hourly, non union employees and Daily's employees. Defined Contribution Plan Disclosure [Line Items] Defined contribution pans Defined Contribution Plan, Covering Daily Employees Number of Plans Number of defined contribution plans covering Daily's employees Represents the number of defined contribution plans covering Daily's employees. Defined Contribution Plan, Employee Contribution, Percentage of Employee Contribution Employer contribution (as a percent of employee contributions) The employee contributions to the plan per calendar year as a percentage of employee contributions. Defined Contribution Plan, Employee Contribution Limit, Percentage of Compensation Employer contribution limit per calendar year (as a percent of compensation) The limit of annual employee contributions to the plan per calendar year as a percentage of compensation. Defined Contribution Plan, Vesting Percentage after One Year of Service Vesting percentage after one year of service Represents the percentage of vesting after first year of service. Defined Contribution Plan, Vesting Percentage with Each Additional Completed Year of Service after One Year Additional vesting percentage with each additional completed year of service Represents the additional vesting percentage with each additional completed year of service, after the first year of service. Deferred Compensation Arrangement with Individual [Abstract] Deferred compensation plan Number of Deferred Compensation Plans Number of deferred compensation plans Represents the number of deferred compensation plans. Deferred Compensation Arrangement Reduction in Employees Compensation in Exchange for Values in Investments Number Number of investments against the values of which, employee may be allowed to reduce their compensation Represents the number of investments against the values of which, employees may be allowed to reduce their compensation under deferred compensation plan. Deferred Compensation Arrangement Investment Option Plan Number of Investments Referred to Measure Interest Number of investments, which are taken as reference to measure the interest that may be acquired Represents the number of investments, which are taken as reference to measure the interest that may be acquired by employees in exchange for reduction in their compensation. Deferred Compensation Arrangement Employer Contribution as Percentage of Employees Reduced Contribution Employer contribution as percentage of the employees' reduced compensation Represents the employer's contribution as a percentage of employees' reduced compensation under the deferred compensation plan which allows certain employees to reduce their compensation in exchange for values in investments. Deferred Compensation Plan, Investment Income (Loss), Related to Trading Securities Investment income (loss) related to the mark-to-market of investments treated as trading securities Represents the deferred compensation plan investment income (loss) related to the mark-to-market of the investments treated as trading securities. Purchase Commitment Including Long-term Commitment [Member] Purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. Total firm purchase commitments Unrecorded Unconditional Purchase Obligation, Long-term Commitments Contract Period Contract period (in years) Represents period of long-term commitments contracts. Performance Incentive Payments under Contractual Obligations Incentive payments for achieving certain performance standards Represents the incentive payments to be made for achieving certain performance standards. Payments under Contractual Obligations Amount paid under the contract Represents the amount of cash paid under contract grower finishing arrangements. Schedule of Income (Loss) from Equity Method Investments by Segment [Text Block] Summary of specific financial information related to income from affiliates Tabular disclosure of income or loss from equity method investments by segment. Reconciliation of Depreciation and Amortization from Segment to Consolidated [Text Block] Summary of specific financial information related to depreciation and amortization Tabular disclosure of all significant reconciling items in the reconciliation of total depreciation and amortization from reportable segments to the entity's consolidated totals. Schedule of Investment in and Advances to Affiliates by Segment [Text Block] Summary of specific financial information related to investment in and advances to affiliates Tabular disclosure of investments in and advances to affiliates by segment. Reconciliation of Capital Expenditure from Segment to Consolidated [Text Block] Summary of specific financial information related to capital expenditures Tabular disclosure of all significant reconciling items in the reconciliation of total capital expenditures from reportable segments to the entity's consolidated totals. Schedule of Debt Instruments [Table] A table or schedule providing information pertaining to short-term and long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. Foreign Subsidiary Obligation at 5.34 Percent Due 2012 through 2021 [Member] Represents the foreign subsidiary obligation with an interest rate of 5.34 percent due 2012 through 2021. Foreign subsidiary obligation, 5.34%, due 2012 through 2021 Long-term Debt and Other Long-term debt Represents the current and noncurrent portion of the aggregate of long-term debt instruments including credit facilities, senior notes, capital lease obligations and other debt. Long-term debt Debt Instrument, Floating Interest Rate, Minimum When presenting a range of interest rates, represents the minimum floating interest rate as of the balance sheet date. Floating rates, low end of range (as a percent) Debt Instrument, Floating Interest Rate, Maximum Floating rates, high end of range (as a percent) When presenting a range of interest rates, represents the maximum floating interest rate as of the balance sheet date. Foreign Consolidated Subsidiary Reporting Period Lag Represents the lag for reporting remeasurement of notes payable denominated in foreign currency. The lag for reporting remeasurement of notes payable denominated in foreign currency (in months) Valuation Allowances and Reserves, Deductions and Recoveries and Currency Translation Net deductions/ Other Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. Along with total of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized. Along with total currency translation adjustment. Deferred Compensation Arrangement, Compensation Expense Deferred compensation plan expense (income) The compensation expense recognized during the period relating to the deferred compensation arrangement. Enhanced Cash Mutual Funds [Member] Enhanced cash mutual fund Represents enhanced cash mutual funds, for which information is being disaggregated. Emerging markets debt mutual fund Emerging Market Debt [Member] Emerging markets debt mutual fund Represents emerging markets debt, for which information is being disaggregated. Emerging markets - fixed income Net Fair Value of Derivative Assets Net of Derivative Liabilities and Net of Margin Deposit Fair value as of the balance sheet date of derivative assets and derivative liabilities, presented on a net basis, and also net of related margin accounts. Derivative assets and liabilities, net basis Miscellaneous Net [Member] Caption reflecting the net miscellaneous income (expense) of items not included elsewhere in the income statement. Miscellaneous, net Other Current Assets [Member] Other current assets Represents investments included within other the current assets caption in the balance sheet. Conditional and Unconditional Commitments Under Contract [Abstract] Conditional and Unconditional Commitments Japan JAPAN EDN [Member] Relates to floating power generating facility Estrella Del Norte ("EDN"). EDN EDM [Member] Relates to floating power generating facility Estrella Del Mar ("EDM"). EDM EDN and EDM [Member] Relates to floating power generating facilities Estrella Del Norte ("EDN") and Estrella Del Mar ("EDM"). EDN and EDM Proceeds from Sale of Power Generating Facilities Previously Escrowed The cash inflow that was previously escrowed from the sale of a property, plant, and equipment asset that was used in the normal conduct of business to generate power for sale. Amount received by the entity on sale of floating power generating facilities from previously escrowed balance Proceeds from Sale of Power Generating Facilities Inventory Items Amount received by the entity on sale of floating power generating facilities from various inventory items The cash inflow from the sale of a various inventory items associated with floating power generating facilities. Property Pant and Equipment and Inventory, Net Net book value of power generating facilities and certain inventory items Represents the sum total of the net value of property, plant and equipment and inventory. Foreign [Member] Foreign Country Location outside its country of domicile. Businesses Conducting Flour Maize and Feed Milling and Poultry Production and Processing [Member] Represents businesses conducting flour, maize and feed milling and poultry production and processing for which information is being disaggregated. Businesses conducting flour, maize and feed milling and poultry production and processing North Carolina NORTH CAROLINA Equity Method Investment, Ownership Percentage, Reacquired by Third Party Represents the ownership percentage in the equity method investee that was reacquired by the co-owner of the investee, prior to the entity purchasing its interest from the co-owner. Percentage of interest held by Murphy Brown, LLC reacquired by Maxwell Group Equity Method Investment, Summarized Financial Information, Intangible Assets Trade Name The amount of the equity method investee's intangible assets for trade name. Investee's intangible assets for trade name Equity Method Investment, Summarized Financial Information, Goodwill The amount of the equity method investee's intangible assets for goodwill. Investee's intangible assets for goodwill Investment in Project Represents the entity's investment in the project as of the balance sheet date. Investment to date in project Line of Credit, Extended by Entity to Equity Method Investee Represents the equity method investee's borrowing capacity under the line of credit provided by the entity. Capacity provided by Seaboard Line of Credit, Extended by Entity to Equity Method Investee, Description of Variable Rate Basis The reference rate, such as LIBOR or Prime, for the variable rate under the line of credit provided by the entity to the equity method investee. Reference rate Line of Credit, Extended by Entity to Equity Method Investee, Basis Spread on Variable Rate The percentage points added to the reference rate to compute the variable rate under the line of credit provided by the entity to the equity method investee. Spread over reference rate (as a percent) Line of Credit, Extended by Entity to Equity Method Investee, Unused Capacity Commitment Fee, Percentage The fee, expressed as a percentage of the line of credit facility provided by the entity to the equity method investee, for available but unused credit capacity under the credit facility. Commitment fee on unused portion (as a percent) Loan to Equity Method Investee, Loan Fee Amortization Recognized as Interest Income Amortization during period of cash fee, recorded in interest income The amortization recorded during the period on the loan fee received from equity method investee, which was recognized as interest income Loans Receivable, Effective Interest Rate Represents the effective interest rate on the loan receivable. Approximate effective interest rate (as a percent) Equity Method Investee, Insurance Gain Entitys Share Represents the entity's share of the equity method investee's gain attributable to proceeds from insurance settlements. Seaboard's proportionate share of insurance gain related to earthquake Impairment charge offset by reduction to noncontrolling interest Represents the amount of the reduction during the period of a noncontrolling interest resulting from impairment of assets partially owned by the reporting entity. Noncontrolling Interest Decrease from Impairment of Assets Total impact on net earnings attributable to Seaboard, net of taxes Represents the net of tax impact of assets impairment on the net earnings attributable to the parent entity. Impact of Impairment on Net Earnings Deferred Costs Deferred Inventory Costs [Policy Text Block] Disclosure of accounting policy for costs related to inventory delivered to customers for which the sale has not yet been recognized as revenue because final price is not yet fixed and determinable. Capitalized interest The amount of interest capitalized for the period related to property, plant and equipment. Interest Paid Capitalized Related to Property, Plant and Equipment Foreign currency gain Foreign Currency Remeasurement Gain (Loss) before Tax Amount of gain (loss) included in the statement of earnings from remeasuring financial instruments denominated in a currency that is different from the functional currency of the foreign consolidated subsidiary. Accrued voyage costs Accrued Voyage Costs, Current Carrying value as of the balance sheet date of obligations for voyage costs incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued commodity inventory Accrued Liability for Commodity Inventory, Current Carrying value as of the balance sheet date of obligations for commodity inventory costs incurred and payable. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Payments for (Proceeds from) Issuance of Short Term Note Receivable to Affiliate The net cash inflow or outflow associated with issuance of short-term note receivable to affiliates of the reporting entity during the reporting period. Short-term note receivable issued to affiliate, net Payment of Advances on Capital Lease The cash outflow associated with payment of advances on capital lease of the reporting entity during the reporting period. Advance payment on capital lease Advance capital lease payment to begin operations in 2012 of a flour mill in Ghana Payments for Issuance of Long-term Note Receivable to Affiliate The cash outflow associated with issuance of long-term note receivable to affiliates of the reporting entity during the reporting period. Long-term notes receivable issued to affiliate Foreign receivables, excluding receivables due from affiliates Foreign Accounts Receivable excluding Receivables from Affiliates Amounts due from foreign customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. These exclude amounts due from affiliates. Segment Reporting Net Assets Denominated in USD Net assets of Sugar segment denominated in U.S. dollars Represents net assets of the reportable segment denominated in United States dollars. Emerging Markets Trading Debt Mutual Funds [Member] Emerging markets trading debt mutual funds Represents emerging markets trading debt mutual funds that are bought and held principally for the purpose of selling in the near term (thus held for only a short period of time). Emerging Markets Trading Debt Securities [Member] Emerging markets trading debt securities Represents emerging markets trading debt securities that are bought and held principally for the purpose of selling in the near term (thus held for only a short period of time). Soybean Oil [Member] Soybean oil Represents the derivative instrument whose primary underlying risk is tied to soybean oil. Initial Lease Term Initial lease term (in years) Represents the initial term of lease. Multiemployer Plan Percentage of Contributions Maximum Maximum percentage of total contributions to multi-employer pension fund Represents the maximum percentage of total contributions to multi-employer pension fund. Number Of Entities Discontinuing Operations Number of entities discontinuing operations Represents the number of non-consolidated affiliates that discontinued operations. Payment to increase ownership interest in affiliate Payments to Acquire Additional Interest in Subsidiaries Number of investment policies Defined Benefit Plan Number Of Investment Policies Represents the number of investment policies which the entity has implemented due to different characteristics of its defined benefit pension plans. Fixed Assets Impairment and Accrued Severance Charge Proportionate share of impairment of fixed assets charge and accrued severance charges The Company's share of impairment of fixed assets charges and accrued severance charges.