XML 19 R24.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 28, 2015 | Feb. 18, 2015 | Jun. 21, 2011
Loss Contingencies [Line Items] |  |  |
Term of guarantees | 1 year |  |
Payments required to be made under guarantees, maximum | $ 10.2 us-gaap_GuaranteeObligationsMaximumExposure |  |
United States Department of Commerce Antidumping Review [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Assignment of antidumping duty rate on U.S. imports by Company subsidiaries (in hundredths) |  | 13.70%mli_AssignmentOfAntidumpingDutyRateOnUSImportsByCompanySubsidiaries / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnfavorableRegulatoryActionMember | 19.80%mli_AssignmentOfAntidumpingDutyRateOnUSImportsByCompanySubsidiaries / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnfavorableRegulatoryActionMember
Reserve for Antidumping Duties | $ 1.1 us-gaap_LossContingencyAccrualAtCarryingValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnfavorableRegulatoryActionMember |  |

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 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
- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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