Summary of Significant Accounting Policies (Policies)	9 Months Ended
Oct. 02, 2021
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 2020 Form 10-K. The company’s interim results are not necessarily indicative of future full year results for the fiscal year 2021. 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 October 2, 2021 and January 2, 2021, the results of operations for the three and nine months ended October 2, 2021 and September 26, 2020, cash flows for the nine months ended October 2, 2021 and September 26, 2020 and statement of stockholders' equity for the three and nine months ended October 2, 2021 and September 26, 2020.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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. Actual results could differ from the company's estimates.
Non-Cash Share-Based Compensation	Non-Cash Share-Based CompensationThe 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.
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.
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)

9 Months Ended

Oct. 02, 2021

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 2020 Form 10-K. The company’s interim results are not necessarily indicative of future full year results for the fiscal year 2021.

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 October 2, 2021 and January 2, 2021, the results of operations for the three and nine months ended October 2, 2021 and September 26, 2020, cash flows for the nine months ended October 2, 2021 and September 26, 2020 and statement of stockholders' equity for the three and nine months ended October 2, 2021 and September 26, 2020.

Use of Estimates

Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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. Actual results could differ from the company's estimates.

Non-Cash Share-Based Compensation

Non-Cash Share-Based CompensationThe 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.

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.

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.