| Document and Entity Information | Jul. 06, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | MIDDLEBY CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000769520 |
| Document Type | 8-K |
| Document Period End Date | Jul. 6, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-9973 |
| Entity Tax Identification Number | 36-3352497 |
| Entity Address, Address Line One | 1400 Toastmaster Drive |
| Entity Address, City or Town | Elgin |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60120 |
| City Area Code | (847) |
| Local Phone Number | 741-3300 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock |
| Trading Symbol | MIDD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
