Trade and other receivables, net Accounts Receivable, Net, Current Total receivables Accumulated other comprehensive income (loss), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss, net of tax Payments to Acquire Businesses, Net of Cash Acquired Acquisition of businesses, net of cash acquired Additional Paid in Capital, Common Stock Paid-in capital Asset-backed Securities [Member] Asset Backed Securities [Member] Condensed Consolidated Balance Sheets [Abstract] Statement of Financial Position [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Combinations Business Combinations Policy [Policy Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Payments To Acquire Businesses Gross Cash consideration paid Assets acquisition, consideration Certificates of Deposits [Member] Certificates of Deposit [Member] Commercial Paper [Member] Commercial Paper [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock ($0.01 par value) - authorized 120,000 shares, issued 75,061 shares Common Stock, Value, Issued Common stock ($0.01 par value) Comprehensive income attributable to Cal-Maine Foods, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Corporate Bonds [Member] Corporate Debt Securities [Member] Cost of sales Cost of Goods and Services Sold Total current liabilities Liabilities, Current Current liabilities: Liabilities, Current [Abstract] Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred income taxes expense (benefit): Total Diluted (in dollars per share) Earnings Per Share, Diluted Stock based compensation expense Share-based Payment Arrangement, Expense Feed and supplies Agricultural Related Inventory, Feed and Supplies (Gain) loss on disposal of fixed assets Gain Loss On Sale Of Property Plant Equipment (Gain) Loss on disposal of property, plant and equipment Gross profit Gross profit (loss) Gross Profit Income Statement [Abstract] Condensed Consolidated Statements of Income [Abstract] Income Taxes Receivable Income tax receivable Intangible Assets Net Excluding Goodwill Intangible assets, net Goodwill Goodwill, Balance Goodwill, Balance Goodwill Inventories Total inventories Inventory, Net Investments in unconsolidated entities Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investment Securities Available-for-Sale Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Total liabilities Total liabilities Liabilities Total Liabilities and Stockholders' Equity Liabilities and Equity Liabilities and stockholders' equity Liabilities and Equity [Abstract] Loss Contingencies By Nature Of Contingency [Axis] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Domain] Loss Contingency New Claims Filed Number Number new lawsuits filed Stockholders Equity Attributable to Noncontrolling Interest Noncontrolling interest in consolidated entity Minority Interest Ownership Percentage By Parent Ownership interest Ownership interest, acquired remaining Minority Interest Period Increase Decrease Acquisition of noncontrolling interest in MeadowCreek Foods LLC Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Net cash provided by operations Net Cash Provided by (Used in) Operating Activities Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income attributable to Cal-Maine Foods, Inc. Net profit (loss) attributable to Cal-Maine Foods, Inc. Net Income (Loss) Attributable to Parent Net Income (Loss) Net income (loss) attributable to Cal-Maine Foods, Inc. 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Payments to Acquire Property, Plant, and Equipment Repayments Of Long Term Debt Principal payments on long-term debt Retained earnings Retained Earnings (Accumulated Deficit) Inventories Inventory Disclosure [Text Block] Available For Sale Securities Debt Securities Current Estimated Fair Value Segment Reporting Segment Reporting Disclosure [Text Block] Selling, general and administrative Selling, General and Administrative Expense Number of Shares, Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Shares, Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Weighted Average Grant Date Fair Value, Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value 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Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Condensed Consolidated Statements of Cash Flows [Abstract] Condensed Consolidated Statements of Cash Flows [Abstract] Condensed Consolidated Statements of Comprehensive Income [Abstract] Consolidated Statements of Comprehensive Income (Loss) [Abstract] Consolidated Statements of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Equity [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note Disclosure [Text Block] Equity Subsequent Event Type [Axis] Subsequent Event Type [Domain] Total current assets Assets, Current Current assets: Assets, Current [Abstract] Diluted (in shares) Weighted-average common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Effect of dilutive restricted shares (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Basic (in shares) Weighted-average common shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Common Stock [Member] Common Stock [Member] Estimated Fair Value, Noncurrent Debt Securities, Available-for-sale, Noncurrent Investment securities available-for-sale Debt Securities, Available-for-sale Total Total Assets Total assets Assets Other noncurrent liabilities Other Liabilities, Noncurrent Schedule Of Business Acquisitions By Acquisition Contingent Consideration [Text Block] Schedule of Beginning and Ending Balances in Fair Value of The Contingent Consideration Dividends Dividends Financial Instruments [Domain] Financial Instruments [Domain] Stock Based Compensation Share-based Payment Arrangement [Text Block] Statement [Table] Statement [Table] Assets Assets [Abstract] Statement [Line Items] Statement [Line Items] Schedule of Assets Measured at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value Measurements Fair Value Disclosures [Text Block] Class of Stock [Domain] Class of Stock [Domain] Common stock in treasury at cost - 27,407 shares at November 29, 2025 and 26,567 shares at May 31, 2025 Treasury Stock, Value Repurchase of shares Purchases of investment securities Purchases of investment securities Class A Convertible Common Stock [Member] Class A Common Stock [Member] Class A [Member] Other long-term assets Other Assets, Noncurrent Net income per common share: Net Income per Common Share [Abstract] Goodwill Acquired During Period Additions Goodwill recognized at the time of acquisition Debt Securities, Available-for-sale [Line Items] Class of Stock [Axis] Class of Stock [Axis] Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Total Cal-Maine Foods, Inc. stockholders' equity Beginning balance Ending balance Total equity Stockholders' equity Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Income tax (benefit) expense Dividends per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Equity Components [Axis] Equity Components [Axis] Paid In Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Accum. Other Comp. Loss [Member] Equity Component [Domain] Equity Component [Domain] Dividends Payable Stockholders' Equity, Policy [Policy Text Block] Statement Business Segments [Axis] Denominator Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Treasury Stock Value Acquired Cost Method Repurchase of shares Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Property, plant & equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Net Income per Common Share Earnings Per Share [Text Block] Business Combination Acquisition Related Costs Business acquisition, transaction costs Profit Loss Net income Net income (loss) Net income Net profit (loss) attributable to Cal-Maine Foods, Inc. 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contingent consideration, Ending balance Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements Fair value adjustments Unrealized holding gain (loss) on available-for-sale securities, net of reclassification adjustments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Other comprehensive income (loss), net of tax Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Fair Value Measurement Policy [Policy Text Block] Fair Value Measurement Investment Type [Axis] Investment Type [Axis] Municipal Bonds [Member] Municipal Bonds [Member] U S Government Agencies Shortterm Debt Securities [Member] US Government and Agency Obligations [Member] U S Treasury Bill Securities [Member] Treasury Bills [Member] Noncontrolling Interest Increase From Subsidiary Equity Issuance Contributions to Crepini Foods LLC Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Total assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents Cash Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities Investment securities available-for-sale Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables Accounts receivable, net Accounts receivable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Prepaid Expense And Other Assets Prepaid expenses and other current assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill Intangible assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable Accounts payable and other current liabilities Judicial Ruling [Member] Fiscal period duration Deferred income taxes, net Deferred Income Tax Liabilities, Net Deferred income taxes Treasury Stock [Member] Treasury Stock, Common [Member] Common stock in treasury (in shares) Treasury Stock, Common, Shares Mutual Funds [Member] Mutual Funds [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue From Contract With Customer Excluding Assessed Tax Net sales Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Litigation Settlement Amount Awarded To Other Party Amount awarded to other party Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Food And Beverage [Member] Foodservice [Member] Retail [Member] Service Other [Member] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Asset Acquisition [Table] Asset Acquisition [Axis] Asset Acquisition [Domain] Cover [Abstract] Cover [Abstract] Document Type Document Type Document Annual Report Document Quarterly Report Document Transition Report Document Transition Report Document Fin Stmt Error Correction Flag Entity Interactive Data Current Entity Interactive Data Current Amendment Flag Amendment Flag ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Period End Date Document Period End Date Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Shell Company Entity Shell Company Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Public Float Entity Public Float Entity Address, Address Line One Entity Address, Address Line One Entity Address Address Line 2 Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Auditor Name Auditor Firm Id Auditor Location Insider Trading Arr [Line Items] Rule 10b 51 Arr Adopted Flag Rule 10b 51 Arr Trmntd Flag Non Rule 10b 51 Arr Adopted Flag Non Rule 10b 51 Arr Trmntd Flag Litigation Case [Domain] Litigation Case [Domain] Litigation Case [Axis] Litigation Case [Axis] Ownership [Axis] Ownership [Domain] Product and Service [Domain] Product and Service [Domain] Product and Service [Axis] Product and Service [Axis] Flocks, net of amortization Agricultural Related Inventory, Flocks Agricultural related inventory, flocks, net of accumulated amortization. Egg products [Member] Egg Products [Member] Egg Products [Member] Schedule of Cost of Sales Amortization and Mortality Schedule Of Cost Of Sales Amortization And Mortality [Table Text Block] Schedule Of Cost Of Sales Amortization And Mortality. Specialty shell egg sales [Member] Specialty Shell Egg Sales [Member] Specialty Shell Egg Sales [Member] Agricultural Related Inventory, Layers Agricultural Related Inventory, Layers Layers Weighted average shares outstanding: Weighted average shares outstanding [Abstract] Weighted average shares outstanding [Abstract] Conventional shell egg sales [Member] Non-Specialty Shell Egg Sales [Member] Non-Specialty Shell Egg Sales [Member] Purchase of common stock by treasury Proceeds From (Purchase of) Sale Of Treasury Stock Net of Stock Issued During Period, Restricted Stock Award Proceeds From (Purchase of) Sale Of Treasury Stock Net of Stock Issued During Period, Restricted Stock Award Pullets and breeders Agricultural Related Inventory, Pullets and Breeders Agricultural Related Inventory, Pullets and Breeders Other [Member] Other [Member] Other [Member] State of Texas v. Cal-Maine Foods, Inc. d/b/a Wharton; and Wharton County Foods, LLC [Member] State of Texas v. Cal-Maine Foods, Inc. d/b/a Wharton; and Wharton County Foods, LLC [Member] State of Texas v. Cal-Maine Foods, Inc. d/b/a Wharton; and Wharton County Foods, LLC [Member] Benton County Foods [Member] Available For Sale Debt Securities, Current, Accumulated Gross Unrealized Gain, Before Tax Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), clasified as current. Gains in Accumulated Other Comprehensive Income, Current Unrealized Gains Available For Sale Debt Securities, Noncurrent, Accumulated Gross Unrealized Gain, Before Tax Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), clasified as noncurrent. Unrealized Gains, Noncurrent Available For Sale Debt Securities, Current, Accumulated Gross Unrealized Loss, Before Tax Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. Unrealized Losses Available For Sale Debt Securities, Noncurrent, Accumulated Gross Unrealized Loss, Before Tax Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent. Unrealized Losses, Noncurrent Available For Sale Debt Securities, Current, Amortized Cost Basis Amortized Cost Available For Sale Debt Securities, Noncurrent, Amortized Cost Basis Amortized Cost, Noncurrent Stock Compensation Plan Transactions Stock Compensation Plan Transactions Stock compensation plan transactions Stock Compensation Plan Transactions Shares Stock Compensation Plan Transactions Shares Stock compensation plan transactions (in shares) Net income per common share attributable to Cal-Maine Foods, Inc. Earnings Per Share, Basic Diluted [Abstract] Net income per common share attributable to Cal-Maine Foods, Inc. Fassio Egg Farms, Inc. [Member] Business Combination, Contingent Consideration, Measurement Period Contingent consideration measurement period Contingent consideration [Member] Litigation Settlement, Treble Damages Treble damages Kraft Foods Global, Inc. et al. v. United Egg Producers, Inc. et al [Member] Significant Accounting Policies [Line Items] Percentage Of Net Income Loss Used To Compute Accrued Dividends Percentage Of Net Income Loss Used To Compute Accrued Dividends Percentage of net income loss used to compute accrued dividends Echo Lake Foods, Inc. [Member] (Gain) Loss On Involuntary Conversions (Gain) loss on involuntary conversions Equity [Table] Equity [Table] Prepared Foods [Member] Product and Sales Channel Segment [Member] State of Oklahoma v. Cal-Maine Foods, Inc. d/b/a Watershed Pollution Litigation [Member] Clean Egg, LLC [Member] Business Combination Number Of Layers And Pullets Acquired Business combination number of layers and pullets acquired In Re Shell Eggs Litigation [Member] Proceeds From Distributions Received From Unconsolidated Entities Distributions from unconsolidated entities