Document and entity information. Document And Entity Information [Abstract] Statement [Table] Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Common Stock [Member] Common Stock [Member] Common Class A [Member] Class A Common Stock [Member] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Condensed Consolidated Balance Sheets [Abstract] Assets [Abstract] Assets Cash and cash equivalents Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Investment securities available-for-sale, Current Investment securities available-for-sale Investment securities available-for-sale, Current Accounts and Other Receivables, Net, Current Trade receivables (less allowance for doubtful accounts of $529 at December 1, 2012 and $589 at June 2, 2012) and other receivables Inventories,Net Inventories Total inventories Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current, Total Assets, Current Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, plant and equipment, net Net property, plant and equipment Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Other investments Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total Amortizable intangible assets Other intangible assets Amortizable intangible assets Other Assets Noncurrent Other assets Other Assets, Noncurrent, Total Notes, Loans and Financing Receivable, Net, Noncurrent Notes receivable - noncurrent Notes, Loans and Financing Receivable, Net, Noncurrent, Total Assets TOTAL ASSETS Liabilities And Stockholders' Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Accounts payable and accrued expenses Accounts payable and accrued expenses Accounts payable and accrued expenses Accrued Dividends Payable. Accrued Dividends Payable Accrued dividends payable Current maturities of long-term debt Current maturities of long-term debt Deferred income taxes, Current Deferred income taxes Liabilities, Current Total current liabilities Long-term debt, less current maturities Long-term debt, less current maturities Other noncurrent liabilities Other Liabilities, Noncurrent, Total Deferred income taxes Liabilities Total liabilities Commitments and Contingencies Commitments and Contingencies - See Note 5 Stockholders' Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Stockholders' equity: Common stock, value Authorized shares - 60,000 Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock Issued 35,130 shares and 21,453 shares outstanding at August 28, 2010 and 21,441 shares outstanding at May 29, 2010 Additional Paid in Capital, Common Stock Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Paid-in capital Retained earnings Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained earnings Accumulated other comprehensive income, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income (loss), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Common stock in treasury 13,705 shares at February 27, 2010 and 13,741 shares at May 30, 2009 Common stock in treasury at cost - 13,495 shares at December 1, 2012 and 13,609 shares at June 2, 2012 Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total Cal-Maine Foods, Inc. stockholders' equity Minority Interest Noncontrolling interests in consolidated entities Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Noncontrolling interest in consolidated entities Stockholders' Equity Attributable to Noncontrolling Interest, Total Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total stockholders equity Balance at December1, 2012 Balance at June 2, 2012 Total stockholders' equity Liabilities and Stockholders Equity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Allowance for Doubtful Accounts Receivable, Current Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Allowance for doubtful accounts Common stock, par value per share Common stock, authorized shares Common stock, issued Common Stock, Shares, Issued, Total Common stock, shares outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Treasury stock, shares Treasury Stock, Shares, Ending Balance Treasury Stock, Shares, Beginning Balance Condensed Consolidated Statements Of Operations [Abstract] Net sales Sales Revenue Cost of sales Cost of sales Gross Profit Gross profit Selling, general and administrative Selling, general and administrative expense administrative Operating Income (Loss) Operating income Other Nonoperating Income (Expense) [Abstract] Other income (expense): Interest Expense Interest expense, net Interest Expense, Total Other Nonoperating Income (Expense) Other Other Nonoperating Income (Expense) Nonoperating income (expense), total Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income before income taxes and noncontrolling interest Income tax expense (benefit) Income tax expense Income Tax Expense Net income Net income (loss) Net income before noncontrolling interest Net income including noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net loss attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest, Total Less: Net income (loss) attributable to noncontrolling interest Net (income) loss attributable to noncontrolling interest Net income including noncontrolling interest Net income attributable to Cal-Maine Foods,Inc. Net income (loss) attributable to Cal-Maine Foods, Inc. Net income attributable to Cal-Maine Foods, Inc. Net income (loss) for fical year Net Income Per Common Share [Abstract] Net income per common share attributable to Cal-Maine Foods Inc.: Earning Per Share Basic Basic Earning Per Share Basic Earnings Per Share Diluted Diluted Diluted Common Stock, Dividends, Per Share, Declared Dividends per common share Weighted average shares outstanding [Abstract] Weighted average shares outstanding [Abstract] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Basic Weighted average common stock outstanding (shares) Basic Weighted Average Number of Shares Outstanding, Basic, Total Basic weighted-average common shares Weighted Average Number of Shares Outstanding, Diluted, Total Diluted Dilutive potential common shares Dilutive potential common shares Condensed Consolidated Statements Of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss), before tax: Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Unrealized holding gain (loss) on available-for-sale securities, net of reclassification adjustments Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Total Other Comprehensive Income (Loss), before Tax Other comprehensive income (loss), before tax Other comprehensive income (loss), before tax Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Income tax expense (benefit) related to items of other comprehensive income (loss) Income tax expense (benefit) related to items of other comprehensive income Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Total Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive loss attributable to the noncontrolling interest Reclass equity portion of Texas Egg Products, LLC in connection with purchase of shell egg operations of Pilgrim's Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total Less: comprehensive income (loss) attributable to the noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Cal-Maine Foods, Inc. Condensed Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Operating activities: Depreciation and amortization Depreciation, Depletion and Amortization, Total Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Other adjustments, net Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Total Net Cash Provided by (Used in) Operating Activities Net cash provided by operations Net Cash Provided by (Used in) Investing Activities [Abstract] Investing activities: Payments To Acquire Investments Purchases of investments Purchase of investments Payments to Acquire Investments, Total Sales of investments Sales of investments Proceeds from Sale, Maturity and Collection of Investments, Total Purchases of property, plant and equipment Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment, Total Increase in notes receivable and equity investments in affiliates Increase in notes receivable and investments in affiliates Payments received on notes receivable and from affiliates Proceeds from Sale and Collection of Notes Receivable, Total Payments to Acquire Businesses, Net of Cash Acquired Acquisition of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired, Total Cash amounts paid to customers as well as additional investments in equity method or cost method investees. Increase in Notes Receivable and Investments in Affiliates Increase in notes receivable and investments in affiliates Increase in notes receivable and investments in affiliates Net proceeds from disposal of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment, Total Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Financing activities: Proceeds from issuance of common stock from treasury Proceeds from issuance of common stock from treasury (including tax benefit on nonqualifying disposition of incentive stock options) Principal payments on long-term debt Principal payments on long-term debt Repayments of Long-term Debt, Total Payment of dividends Payments of dividends Payments of Dividends, Total Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net change in cash and cash equivalents Presentation Of Interim Information [Abstract] Organization Consolidation And Presentation Of Financial Statement Disclosure [Text Block] Presentation Of Interim Information Acquisitions [Abstract] Business Combination Disclosure [Text Block] Acquisitions Stock Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock Based Compensation Inventories [Abstract] Inventory Disclosure [Text Block] Inventories Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Contingencies Earnings Per Share [Text Block] Net Income Per Common Share Accrued Dividends Payable And Dividends Per Common Share [Abstract] Accrued Dividends Payable And Dividends Per Common Share [Text Block] Accrued Dividends Payable And Dividends Per Common Share [Text Block] Accrued Dividends Payable And Dividends Per Common Share Fair Value Measures [Abstract] Fair Value Disclosure [Text Block] Fair Value Measures Available-For-Sale Securities Classified As Current Asset [Abstract] Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure Text Block Available-For-Sale Securities Classified As Current Asset Recent Accounting Pronouncements [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recent Accounting Pronouncements Guarantee [Abstract] Guarantee [Abstract] Investments in and Advances to Affiliates, Schedule of Investments [Text Block] Guarantee Noncontrolling Interest [Abstract] Noncontrolling Interest and Pro Forma Information Noncontrolling Interest Schedule of Purchase Price Allocation [Table Text Block] Schedule Of Purchase Price Allocation Schedule of Inventory, Current [Table Text Block] Schedule Of Inventories Schedule of Weighted Average Number of Shares [Table Text Block] Computation Of Basic And Diluted Net Income Per Share Attributable To The Company Schedule of Dividends Payable [Table Text Block] Schedule Of Dividends Per Common Share Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule Of Fair Value And Carrying Value Of Borrowings Under Credit Facilities And Long-Term Debt Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule Of Assets Measured At Fair Value On A Recurring Basis Available-for-sale Securities [Table Text Block] Schedule Of Available-For-Sale Securities Classified As Current Assets Investments Classified by Contractual Maturity Date [Table Text Block] Schedule Of Contractual Maturities Of Available-For-Sale Debt Securities Schedule Of Equity Activities Including Noncontrolling Interest [Table Text Block] Schedule Of Equity Activities Including Noncontrolling Interest [Table Text Block] Schedule Of Statment Of Stockholders' Equity Activities, Including Noncontrolling Interest Schedule of Business Acquisitions, by Acquisition [Table] Type Of Acquisition [Axis] Type Of Acquisition [Axis] Type Of Acquisition [Domain] Type Of Acquisition [Domain] Type Of Acquisition [Domain] Contract Capacity [Member] Contract Capacity [Member] Contract Capacity [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer Relationships [Member] Legal Entity [Axis] Entity [Domain] Entity [Domain] Cal-Maine Foods Inc. [Member] Cal Maine Foods Inc [Member] Cal-Maine Foods Inc. [Member] Business Acquisition [Line Items] Business Acquisition, Effective Date of Acquisition Acquisition date Business Acquisition, Cost of Acquired Entity, Purchase Price Purchase price Business Acquisition, Cost of Acquired Entity, Purchase Price, Total Business Acquisition, Cost of Acquired Entity, Cash Paid Cash paid for acquisition Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Value of stock issued for purchase of entity Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Shares issued to entity Business Acquisition, Contingent Consideration, Potential Cash Payment Earn-out contingency Contingent liability Earn-out contingency Business Acquisition, Contingent Consideration, at Fair Value, Current Fair value of contingent earn out Number Of Production Complexes Acquired Number Of Production Complexes Acquired Number of production complexes acquired Number Of Poultry Number Of Poultry Number of laying hens Business Acquisition, Percentage of Voting Interests Acquired Percentage of voting interest acquired in Texas Egg Products, LLC Majority Ownership Interest Held. Majority Ownership Interest Held Interest held in TEP Acquired Finite-lived Intangible Asset, Amount Cost of acquired intangible assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Useful life Business Acquisition, Purchase Price Allocation, Current Assets, Inventory Inventories Business Acquisition, Purchase Price Allocation, Current Assets, Inventory, Total Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment Property, plant and equipment Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment, Total Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill Other intangible assets Business Acquisition, Purchase Price Allocation, Assets Acquired Total assets acquired Business Acquisition, Purchase Price Allocation, Goodwill Amount Goodwill Business Acquisition, Purchase Price Allocation, Goodwill Amount, Total Business Acquisition, Purchase Price Allocation, Other Assets Other investments Note Receivable - noncurrent Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Award Type [Domain] Stock Appreciation Rights S A R S [Member] Stock Appreciation Rights (SARs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Allocated Share-based Compensation Expense Stock based compensation benefit Stock based compensation expense (benefit) Allocated Share-based Compensation Expense, Total Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Incentive plan share authorized Agricultural Related Inventory, Flocks Agricultural Related Inventory, Flocks Flocks Agricultural Related Inventory, Eggs Agricultural Related Inventory, Eggs Eggs Agricultural Related Inventory, Feed and Supplies Feed and supplies Pledged Assets Separately Reported, Securities Pledged under Letter of Credit Facilities, at Fair Value Standby letters of credit Loss Contingency, Number of Defendants Number of co-defendants that reached settlement Incremental Common Shares Attributable to Conversion of Debt Securities Common stock options Incremental Common Shares Attributable to Conversion of Debt Securities, Total Percentage Of Net Income Loss Used To Compute Accrued Dividends Percentage Of Net Income Loss Used To Compute Accrued Dividends Percentage of net income used to compute accrued dividends Number Of Days After First, Second And Third Quarter Dividends Paid Number Of Days After First, Second And Third Quarter Dividends Paid Number of days after first, second and third quarter dividends paid Number Of Days After Fourth quarter Dividends Paid Number Of Days After Fourth quarter Dividends Paid Number of days after fourth quarter dividends paid Number Of Days Dividends Paid Following Record Date. Number Of Days Dividends Paid Following Record Date Number of days dividends paid following record date One Third Of Net Income Attributable To Parent One Third Of Net Income Attributable To Parent 1/3 of net income attributable to Cal-Maine Foods, Inc. Percentage Of Net Income Attributable To Parent Percentage Of Net Income Attributable To Parent Percentage of net income attributable to Cal-Maine Foods, Inc. Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Five Point Eight To Six Point Eight Percent Notes Payable [Member] Five Point Eight To Six Point Eight Percent Notes Payable [Member] 5.8 - 6.8% Notes Payable [Member] Series A Senior Secured Notes At Five Point Four Five Percent [Member] Series Senior Secured Notes At Five Point Four Five Percent [Member] Series A Senior Secured Notes At 5.45% [Member] Notes Payable-Texas Egg Products, LLC (Payable To Non-affiliate Equity Members) [Member] Notes Payable Texas Egg Products Llc Payable To Non Affiliate Equity Members [Member] Notes Payable-Texas Egg Products, LLC [Member]