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Aquisitions and Divestitures Acquisitions and Divestitures - Business Combinations Results of of Operations of Acquiree (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended | 1 Months Ended | 4 Months Ended
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Nov. 29, 2014 | Nov. 30, 2013 | Nov. 29, 2014 | Nov. 30, 2013 | Aug. 30, 2014 | Nov. 29, 2014
Business Acquisition |  |  |  |  |  |
Net sales | $ 565.4 us-gaap_SalesRevenueNet | $ 470.5 us-gaap_SalesRevenueNet | $ 1,075.1 us-gaap_SalesRevenueNet | $ 938.6 us-gaap_SalesRevenueNet |  |
Design Within Reach |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |
Net sales | 66.8 us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  | 21.6 us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember | 88.4 us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember
Net sales impact to Herman Miller, Inc. | 61.0 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  | 20.0 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember | 81.0 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember
Net loss | (2.2)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  | (1.6)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember | (3.8)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember
Intercompany Segment Eliminations | Design Within Reach |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |
Net sales | $ (5.8)us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  | $ (1.6)us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | $ (7.4)us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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