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Acquisitions and Divestitures (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended	0 Months Ended	1 Months Ended	3 Months Ended		0 Months Ended	5 Months Ended	1 Months Ended		0 Months Ended	1 Months Ended
	Aug. 30, 2014	May 31, 2014	Aug. 31, 2013 Wholly-owned Contract Furniture Dealership dealerships	Jul. 28, 2014 Design Within Reach	Aug. 30, 2014 Design Within Reach	Aug. 30, 2014 Design Within Reach	Jul. 28, 2014 Design Within Reach	Sep. 30, 2013 Dongguan Sun Hing Steel Furniture Factory Ltd	Mar. 01, 2014 Dongguan Sun Hing Steel Furniture Factory Ltd	Aug. 30, 2014 Cost of Sales Design Within Reach	Aug. 30, 2014 Sales Revenue, Goods, Net Design Within Reach	Jul. 28, 2014 Redeemable Noncontrolling Interest Design Within Reach	Aug. 30, 2014 Herman Miller Consumer Holdings, Inc. Design Within Reach	Jul. 28, 2014 Herman Miller Consumer Holdings, Inc. Design Within Reach
Business Acquisition
Business Acquisition, Percentage of Voting Interests Acquired							81.00%
Purchase price				$ 155.0
Consideration transferred								8.2	6.7
Business Acquisition, Goodwill, Expected Tax Deductible Amount							10
Fair value of fully-vested options granted												1.7
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Percent					4.00%
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests					5.8
Due to Noncontrolling Interest					0.3	0.3
Capital Contributed, Percentage of Acquiree													15.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners														7.00%
Long-term Line of Credit							127.0
Business Combination, Acquisition Related Costs						2.0
Goodwill	302.5	228.2					74.4
Other intangible assets							69.6
Inventory-Related Purchase Accounting Adjustment										$ 1.6	$ 1.4
Numbers of Business Divested			1

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Numbers of Businesses Divested

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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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.

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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.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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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.

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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.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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