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Employee Retirement Plans - Additional Information (Details) | 12 Months Ended
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Dec. 30, 2017 plan
Defined Benefit Plan Disclosure [Line Items] |
Number of defined contribution 401K savings plans | 2

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- Definition Number of Plans + References No definition available. + Details
Name: | midd_NumberOfPlans
Namespace Prefix: | midd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration