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Acquisitions and Divestitures - Schedule of Business Acquisitions, by Acquisition (Details) (USD $) In Millions, unless otherwise specified | 7 Months Ended | 1 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Feb. 28, 2015 | Aug. 30, 2014 | Feb. 28, 2015 | May 31, 2014
Fair value of the assets acquired: |  |  |  |
Goodwill | $ 303.7 us-gaap_Goodwill |  | $ 303.7 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 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current | 1.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 1.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsCurrent / 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 | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 0 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 | 237.9 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 237.9 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 mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 0 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 | 12.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 12.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |
Long term deferred tax liability | 16.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 16.2 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 | 51.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  | 51.2 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 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsCurrent / 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 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current | 1.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | 1.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsCurrent / 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 | (3.7)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (3.7)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 | (0.7)mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.7)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 | (0.6)mlhr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesDeferredTaxLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.6)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 | (0.1)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.1)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Long term deferred tax liability | (0.2)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.2)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 | (0.9)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |  | (0.9)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 |

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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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