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Debt Debt - Phantom (Details) - USD ($) $ in Millions | Mar. 03, 2018 | Jun. 03, 2017
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Debt Disclosure [Abstract] |  |
Finance Leased Assets, Gross | $ 7.0 | $ 7.0

X
- Definition Finance Leased Assets, Gross + References No definition available. + Details
Name: | mlhr_FinanceLeasedAssetsGross
Namespace Prefix: | mlhr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration