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Acquisitions and Divestitures - Schedule of Business Acquisitions, by Acquisition (Details) (USD $) In Millions, unless otherwise specified | 4 Months Ended | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Nov. 29, 2014 | Aug. 30, 2014 | Nov. 29, 2014 | May 31, 2014
Fair value of the assets acquired: |  |  |  |
Goodwill | $ 303.9 us-gaap_Goodwill |  | $ 303.9 us-gaap_Goodwill | $ 228.2 us-gaap_Goodwill
Design Within Reach |  |  |  |
Business Acquisition |  |  |  |
Purchase price | 155.2 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |
Fair value of the assets acquired: |  |  |  |
Cash | 1.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 1.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Accounts receivable | 2.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 2.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Inventory | 47.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 47.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Other current assets | 5.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 5.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Long term deferred tax asset | 3.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 3.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Goodwill | 76.2 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 76.2 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Other intangible assets | 69.3 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 69.3 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Property | 32.0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 32.0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Other long term assets | 2.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 2.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Total assets acquired | 239.9 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 239.9 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Fair value of liabilities assumed: |  |  |  |
Accounts payable | 20.8 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 20.8 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Current deferred tax liabilities | 0.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 0.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Accrued compensation and benefits | 1.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensationandBenefits / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 1.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensationandBenefits / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Other accrued liabilities | 12.3 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 12.3 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Long term deferred tax liability | 17.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 17.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Other long term liabilities | 0.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 0.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Total liabilities assumed | 53.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 53.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Redeemable noncontrolling interests | 25.7 mlhr_BusinessCombinationAcquisitionofLessThan100PercentRedeemableNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 25.7 mlhr_BusinessCombinationAcquisitionofLessThan100PercentRedeemableNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Noncontrolling interests | 5.8 us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 5.8 us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Net assets acquired | 155.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 155.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Scenario, Previously Reported [Member] | Design Within Reach |  |  |  |
Business Acquisition |  |  |  |
Purchase price |  | 155.0 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Fair value of the assets acquired: |  |  |  |
Cash |  | 1.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Accounts receivable |  | 2.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Inventory |  | 47.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Other current assets |  | 5.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Long term deferred tax asset |  | 3.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Goodwill |  | 74.4 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Other intangible assets |  | 69.6 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Property |  | 32.0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Other long term assets |  | 2.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Total assets acquired |  | 238.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Fair value of liabilities assumed: |  |  |  |
Accounts payable |  | 20.8 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Current deferred tax liabilities |  | 0.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Accrued compensation and benefits |  | 1.6 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensationandBenefits / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Other accrued liabilities |  | 12.3 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Long term deferred tax liability |  | 16.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Other long term liabilities |  | 0.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Total liabilities assumed |  | 52.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Redeemable noncontrolling interests |  | 25.7 mlhr_BusinessCombinationAcquisitionofLessThan100PercentRedeemableNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Noncontrolling interests |  | 5.8 us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Net assets acquired |  | 155.0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Scenario, Adjustment [Member] | Design Within Reach |  |  |  |
Business Acquisition |  |  |  |
Purchase price |  |  | 0.2 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Fair value of the assets acquired: |  |  |  |
Cash | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Accounts receivable | (0.2)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.2)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Inventory | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Other current assets | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Long term deferred tax asset | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Goodwill | 1.8 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 1.8 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Other intangible assets | (0.3)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.3)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Property | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Other long term assets | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Total assets acquired | 1.3 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 1.3 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Fair value of liabilities assumed: |  |  |  |
Accounts payable | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Current deferred tax liabilities | 0 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Accrued compensation and benefits | 0 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensationandBenefits / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensationandBenefits / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Other accrued liabilities | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Long term deferred tax liability | 1.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 1.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Other long term liabilities | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Total liabilities assumed | 1.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 1.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Redeemable noncontrolling interests | 0 mlhr_BusinessCombinationAcquisitionofLessThan100PercentRedeemableNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 mlhr_BusinessCombinationAcquisitionofLessThan100PercentRedeemableNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Noncontrolling interests | 0 us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 0 us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Net assets acquired | $ 0.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | $ 0.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |

X
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- Definition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Including Goodwill + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Tax Liabilities, Current + References No definition available. + Details
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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Tax Liabilities, Current + References No definition available. + Details
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- Definition This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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