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v2.4.1.9

Acquisitions and Divestitures (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 7 Months Ended | 9 Months Ended | 0 Months Ended | 5 Months Ended | 0 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 30, 2014 | Feb. 28, 2015 | Feb. 28, 2015 | Sep. 30, 2013 | Mar. 01, 2014 | Jul. 28, 2014 | Nov. 30, 2013 dealerships | Aug. 31, 2013 dealerships | Mar. 01, 2014 dealerships | May 31, 2014
Business Acquisition |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  | $ 127.0 us-gaap_LineOfCredit |  |  |  |
Goodwill |  | 303.7 us-gaap_Goodwill | 303.7 us-gaap_Goodwill |  |  |  |  |  |  | 228.2 us-gaap_Goodwill
Design Within Reach |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 81.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  |
Purchase price |  | 155.2 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  |  |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  |  | 10 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Percent | 4.00%mlhr_NoncontrollingInterestDecreasefromRedemptionsorPurchaseofInterestsPercent / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests | 5.8 us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  | 2.2 us-gaap_BusinessCombinationAcquisitionRelatedCosts / 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 |  |  |  |  |  |  |
Dongguan Sun Hing Steel Furniture Factory Ltd |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | 8.2 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = mlhr_DongguanSunHingSteelFurnitureFactoryLtdMember | 6.7 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = mlhr_DongguanSunHingSteelFurnitureFactoryLtdMember |  |  |  |  |
Redeemable Noncontrolling Interest | Design Within Reach |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Fair value of fully-vested options granted |  |  |  |  |  | $ 1.7 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 / us-gaap_BalanceSheetLocationAxis = mlhr_RedeemableNoncontrollingInterestMember / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember |  |  |  |
Herman Miller Consumer Holdings, Inc. | Design Within Reach |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Capital Contributed, Percentage of Acquiree | 15.00%mlhr_CapitalContributedPercentageofAcquiree / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / dei_LegalEntityAxis = mlhr_HermanMillerConsumerHoldingsInc.Member |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  | 7.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_BusinessAcquisitionAxis = mlhr_DesignWithinReachMember / dei_LegalEntityAxis = mlhr_HermanMillerConsumerHoldingsInc.Member |  |  |  |
ARKANSAS | Wholly-owned Contract Furniture Dealership |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Numbers of Business Divested |  |  |  |  |  |  | 1 mlhr_NumbersofBusinessesDivested / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mlhr_WhollyownedcontractfurnituredealershipMember / us-gaap_StatementGeographicalAxis = stpr_AR |  |  |
OREGON | Wholly-owned Contract Furniture Dealership |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Numbers of Business Divested |  |  |  |  |  |  |  | 1 mlhr_NumbersofBusinessesDivested / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mlhr_WhollyownedcontractfurnituredealershipMember / us-gaap_StatementGeographicalAxis = stpr_OR |  |
MONTREAL | Wholly-owned Contract Furniture Dealership |  |  |  |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |  |  |  |
Numbers of Business Divested |  |  |  |  |  |  |  |  | 1 mlhr_NumbersofBusinessesDivested / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mlhr_WhollyownedcontractfurnituredealershipMember / us-gaap_StatementGeographicalAxis = stpr_E6 |

X
- Definition Capital Contributed, Percentage of Acquiree + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired 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 (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569655-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4616395-111683 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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