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. Other Investment Income (Expense), Net Other investment income (loss), net Other investment loss (income), net Represents the other investment income expense, net earned by the entity during the reporting period. Paid-in-Kind Interest Income Pay-in-kind interest 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. 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. 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. 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. Derivatives and Fair Value of Financial Instruments 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 Condensed Consolidated Balance Sheets Statement [Table] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Statement [Line Items] Statement Assets [Abstract] Assets Assets, Current [Abstract] Current 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 period Short-term Investments Short-term investments Receivables, Net, Current Receivables, net of allowance Inventory, Net Inventories Deferred Tax Assets, Net, Current Deferred income taxes Deferred Costs, Current Deferred costs Other Assets, Current Other current assets Assets, Current Total current assets Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investments in and advances to affiliates Property, Plant and Equipment, Net Net property, plant and equipment Due from Affiliate, Noncurrent Note receivable from affiliate Goodwill Goodwill Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities, Current [Abstract] Current liabilities: Notes Payable to Bank, Current Notes payable to banks Long-term Debt, Current Maturities Current maturities of long-term debt Accounts Payable, Current Accounts payable Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Deferred Revenue, Current Deferred revenue Long-term Debt, Excluding Current Maturities Long-term debt, less current maturities Deferred Tax Liabilities, Noncurrent Deferred income taxes Other Liabilities, Noncurrent Other liabilities Liabilities, Noncurrent Total non-current and deferred liabilities Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' equity: Common Stock, Value, Issued Common stock of $1 par value, Authorized 1,250,000 shares; issued and outstanding 1,215,279 and 1,215,879 shares Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Total Seaboard stockholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity Liabilities and Equity Total liabilities and stockholders' equity Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, authorized shares Common Stock, Shares, Issued Common stock, issued shares Common Stock, Shares, Outstanding Common stock, outstanding shares Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net earnings Net earnings 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: Depreciation, Depletion and Amortization Depreciation and amortization Deferred Income Tax Expense (Benefit) Deferred income taxes Income (Loss) from Equity Method Investments Income (loss) from affiliates Income from affiliates Gain on sale of power generating facilities Gain (Loss) on Sale of Property Plant Equipment Increase (Decrease) in Operating Capital [Abstract] Changes in current assets and liabilities: Increase (Decrease) in Receivables Receivables, net of allowance Increase (Decrease) in Inventories Inventories Increase (Decrease) in Other Current Assets Other current assets Other Operating Activities, Cash Flow Statement Other, net Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash from operating activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Payments to Acquire Short-term Investments Purchase of short-term investments Proceeds from Sale of Short-term Investments Proceeds from the sale of short-term investments Proceeds from Maturities, Prepayments and Calls of Short-term Investments Proceeds from the maturity of short-term investments Payments to Acquire Interest in Subsidiaries and Affiliates Investments in and advances to affiliates, net Payments to Acquire Property, Plant, and Equipment Capital expenditures Payments for (Proceeds from) Other Investing Activities Other, net Net cash from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Proceeds from (Repayments of) Short-term Debt Notes payable to banks, net Proceeds from Issuance of Long-term Debt Proceeds from the issuance of long-term debt Repayments of Long-term Debt Principal payments of long-term debt Payments for Repurchase of Common Stock Repurchase of common stock Payments of Dividends, Common Stock Dividends paid Proceeds from (Payments for) Other Financing Activities Other, net Net cash from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Condensed Consolidated Statements of Cash Flows Accounting Policies and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Accounting Policies and Basis of Presentation Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Inventories Inventory Disclosure [Text Block] Inventories Income Taxes Income Tax Disclosure [Text Block] Income Taxes Derivatives and Fair Value [Text Block] Derivatives and Fair Value of Financial Instruments Employee Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefits Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Stockholders' Equity and Accumulated Other Comprehensive Loss Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity and Accumulated Other Comprehensive Loss Cost of Revenue [Abstract] Cost of sales and operating expenses: Cost of Goods Sold Products Cost of Services Services Other Cost of Operating Revenue Other Cost of Revenue Total cost of sales and operating expenses Gross Profit Gross income Selling, General and Administrative Expense Selling, general and administrative expenses Operating Income (Loss) Operating income Nonoperating Income (Expense) [Abstract] Other income (expense): Interest Expense Interest expense Investment Income, Interest Interest income Foreign Currency Transaction Gain (Loss), before Tax Foreign currency gain (loss), net Nonoperating Income (Expense) Total other income (loss), net Other Nonoperating Income (Expense) Miscellaneous, net Income Tax Expense (Benefit) Income tax expense Net Income (Loss) Attributable to Noncontrolling Interest Less: Net loss attributable to noncontrolling interests Earnings Per Share, Basic Earnings per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Average number of shares outstanding (in shares) Revenue, Net [Abstract] Net sales: Sales Revenue, Goods, Net Products (includes sales to affiliates of $256,703, $120,670, $608,778 and $363,891) Sales Revenue, Services, Net Services Other Revenue, Net Other Revenue, Net Total net sales Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Earnings before income taxes Net earnings attributable to Seaboard Net Income (Loss) Available to Common Stockholders, Basic Condensed Consolidated Statements of Earnings Revenue from Related Parties Products, sales to affiliates Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Amendment Description Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Segment Information Segment Reporting Disclosure [Text Block] Segment Information Payments to Acquire Businesses, Net of Cash Acquired Acquisition of business, net of cash acquired Proceeds from Sale of Productive Assets Proceeds from the sale of fixed assets Payments to Acquire Long-term Investments Purchase of long-term investments Net Cash Provided by (Used in) Continuing Operations Net change in cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate change on cash Gain (Loss) on Disposition of Assets Gain from sale of fixed assets Fixed asset impairment charge Asset Impairment Charges Payments to Acquire Notes Receivable Notes receivable issued to affiliate Repayment of Notes Receivable from Related Parties Principal payments received on notes from affiliate