Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 29, 2025
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements have been prepared by The Middleby Corporation (the "company" or “Middleby”), pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). The financial statements are unaudited and certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations, although the company believes that the disclosures are adequate to make the information not misleading. These financial statements should be read in conjunction with the financial statements and related notes contained in the company's 2024 Form 10-K. The company’s interim results are not necessarily indicative of future full year results for the fiscal year 2025. In the opinion of management, the financial statements contain all adjustments, which are normal and recurring in nature, necessary to present fairly the financial position of the company as of March 29, 2025 and December 28, 2024, the results of operations for the three months ended March 29, 2025 and March 30, 2024, cash flows for the three months ended March 29, 2025 and March 30, 2024 and statement of stockholders' equity for the three months ended March 29, 2025 and March 30, 2024. Certain prior year amounts have been reclassified to be consistent with current year presentation, including beginning to report the results of a division within the company's Food Processing segment as a result of a change in internal management and potential synergies in operations to be consistent with the reporting of financial information used to assess performance and allocate resources. These operations were previously reported in the Commercial Foodservice segment and are now managed and reported in the Food Processing segment. All prior period segment disclosures have been recast to reflect this change. Proposed Separation Transaction On February 25, 2025, the company announced its intent to separate its Food Processing business through a spin-off of the Food Processing business, under which the stock of Food Processing, as a new independent publicly traded company, will be distributed to Middleby’s shareholders. As of the date hereof, Middleby is targeting completion of the separation by early 2026, subject to certain customary conditions, including, among others, final approval by the company’s Board of Directors and the effectiveness of appropriate filings with the SEC. The spin-off of Food Processing is expected to be tax-free for U.S. federal income tax purposes. There can be no assurance that any separation transaction will ultimately occur or, if one does occur, of its terms or timing.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses. Significant estimates and assumptions are used for, but are not limited to, allowances for doubtful accounts, reserves for excess and obsolete inventories, long-lived and intangible assets, warranty reserves, insurance reserves, income tax reserves, non-cash share-based compensation and post-retirement obligations. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed in the notes herein.
Non-Cash Share-Based Compensation	Non-Cash Share-Based Compensation The company estimates the fair value of market-based stock awards and stock options at the time of grant and recognizes compensation cost over the vesting period of the awards and options. Non-cash share-based compensation expense was $2.5 million and $13.8 million for the three months period ended March 29, 2025 and March 30, 2024, respectively.
Fair Value Measures	Fair Value Measures Accounting Standards Codification ("ASC") 820 "Fair Value Measurements and Disclosures" defines fair value as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 establishes a fair value hierarchy, which prioritizes the inputs used in measuring fair value into the following levels: Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Inputs, other than quoted prices in active markets, that are observable either directly or indirectly. Level 3 – Unobservable inputs based the company's own assumptions. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.
Earnings Per Share, Policy	Earnings Per Share “Basic earnings per share” is calculated based upon the weighted average number of common shares actually outstanding, and “diluted earnings per share” is calculated based upon the weighted average number of common shares outstanding and other dilutive securities.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 29, 2025

The condensed consolidated financial statements have been prepared by The Middleby Corporation (the "company" or “Middleby”), pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). The financial statements are unaudited and certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations, although the company believes that the disclosures are adequate to make the information not misleading. These financial statements should be read in conjunction with the financial statements and related notes contained in the company's 2024 Form 10-K. The company’s interim results are not necessarily indicative of future full year results for the fiscal year 2025.

In the opinion of management, the financial statements contain all adjustments, which are normal and recurring in nature, necessary to present fairly the financial position of the company as of March 29, 2025 and December 28, 2024, the results of operations for the three months ended March 29, 2025 and March 30, 2024, cash flows for the three months ended March 29, 2025 and March 30, 2024 and statement of stockholders' equity for the three months ended March 29, 2025 and March 30, 2024.

Certain prior year amounts have been reclassified to be consistent with current year presentation, including beginning to report the results of a division within the company's Food Processing segment as a result of a change in internal management and potential synergies in operations to be consistent with the reporting of financial information used to assess performance and allocate resources. These operations were previously reported in the Commercial Foodservice segment and are now managed and reported in the Food Processing segment. All prior period segment disclosures have been recast to reflect this change.

Proposed Separation Transaction

On February 25, 2025, the company announced its intent to separate its Food Processing business through a spin-off of the Food Processing business, under which the stock of Food Processing, as a new independent publicly traded company, will be distributed to Middleby’s shareholders. As of the date hereof, Middleby is targeting completion of the separation by early 2026, subject to certain customary conditions, including, among others, final approval by the company’s Board of Directors and the effectiveness of appropriate filings with the SEC. The spin-off of Food Processing is expected to be tax-free for U.S. federal income tax purposes. There can be no assurance that any separation transaction will ultimately occur or, if one does occur, of its terms or timing.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses. Significant estimates and assumptions are used for, but are not limited to, allowances for doubtful accounts, reserves for excess and obsolete inventories, long-lived and intangible assets, warranty reserves, insurance reserves, income tax reserves, non-cash share-based compensation and post-retirement obligations. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed in the notes herein.

Non-Cash Share-Based Compensation

The company estimates the fair value of market-based stock awards and stock options at the time of grant and recognizes compensation cost over the vesting period of the awards and options. Non-cash share-based compensation expense was $2.5 million and $13.8 million for the three months period ended March 29, 2025 and March 30, 2024, respectively.

Fair Value Measures

Accounting Standards Codification ("ASC") 820 "Fair Value Measurements and Disclosures" defines fair value as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 establishes a fair value hierarchy, which prioritizes the inputs used in measuring fair value into the following levels:

Level 1 – Quoted prices in active markets for identical assets or liabilities.

Level 2 – Inputs, other than quoted prices in active markets, that are observable either directly or indirectly.

Level 3 – Unobservable inputs based the company's own assumptions.

The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

Earnings Per Share, Policy

Earnings Per Share

“Basic earnings per share” is calculated based upon the weighted average number of common shares actually outstanding, and “diluted earnings per share” is calculated based upon the weighted average number of common shares outstanding and other dilutive securities.