XML 54 R41.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Commitments and Contingencies (Details) $ in Millions |  | 3 Months Ended
--- | --- | ---
Oct. 05, 2016 individual | Apr. 01, 2017 USD ($)
Loss Contingencies [Line Items] |  |
Term of guarantees |  | 1 year
Payments required to be made under guarantees, maximum | $ |  | $ 7.0
Equal Employment Opportunity Commission Matter [Member] |  |
Loss Contingencies [Line Items] |  |
Number of identified individuals | 20 |
Number of unidentified individuals | 150 |

X
- Definition Refers to identified class of individuals during the period. + References No definition available. + Details
Name: | mli_NumberOfIdentifiedClassIndividuals
Namespace Prefix: | mli_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to unidentified class of individuals during the period. + References No definition available. + Details
Name: | mli_NumberOfUnidentifiedClassIndividuals
Namespace Prefix: | mli_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of guarantees. + References No definition available. + Details
Name: | mli_TermOfGuarantees
Namespace Prefix: | mli_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=mli_EqualEmploymentOpportunityCommissionMatterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |