XML 91 R73.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments and Contingencies - United States Department of Commerce Antidumping Review (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 05, 2016 individual | Nov. 27, 2015 USD ($) | Oct. 31, 2008 Import_entry | Apr. 19, 2010
United States Department of Commerce Antidumping Review [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Assignment of antidumping duty rate on U.S. imports by Company subsidiaries |  |  |  | 48.33%
Payment request for interest and duties | $ |  | $ 3.0 |  |
Number of import entries | Import_entry |  |  | 795 |
Equal Employment Opportunity Commission Matter [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of identified class individuals | 20 |  |  |
Number of unidentified class individuals | 150 |  |  |

X
- Definition Antidumping fees imposed on certain subsidiaries of the entity. + References No definition available. + Details
Name: | mli_AssignmentOfAntidumpingDutyRateOnUSImportsByCompanySubsidiaries
Namespace Prefix: | mli_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 import entries made during the period. + References No definition available. + Details
Name: | mli_NumberOfImportEntries
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 Refers to requesting payment for interest and duties related to import entries. + References No definition available. + Details
Name: | mli_PaymentForInterestAndDuties
Namespace Prefix: | mli_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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=us-gaap_UnfavorableRegulatoryActionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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