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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
Nov. 29, 2014
Nov. 30, 2013
Nov. 29, 2014
Nov. 30, 2013
Aug. 30, 2014
Nov. 29, 2014
Business Acquisition            
Net sales $ 565.4us-gaap_SalesRevenueNet $ 470.5us-gaap_SalesRevenueNet $ 1,075.1us-gaap_SalesRevenueNet $ 938.6us-gaap_SalesRevenueNet    
Design Within Reach            
Business Acquisition            
Net sales 66.8us-gaap_SalesRevenueNet
/ us-gaap_BusinessAcquisitionAxis
= mlhr_DesignWithinReachMember
      21.6us-gaap_SalesRevenueNet
/ us-gaap_BusinessAcquisitionAxis
= mlhr_DesignWithinReachMember
88.4us-gaap_SalesRevenueNet
/ us-gaap_BusinessAcquisitionAxis
= mlhr_DesignWithinReachMember
Net sales impact to Herman Miller, Inc. 61.0us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= mlhr_DesignWithinReachMember
      20.0us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= mlhr_DesignWithinReachMember
81.0us-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