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Acquisitions and Divestitures (Details) - Range [Domain] $ in Millions			4 Months Ended	9 Months Ended	10 Months Ended	12 Months Ended
	Jul. 28, 2014 USD ($)	Sep. 30, 2013 USD ($)	Nov. 29, 2014 USD ($)	May. 30, 2015 USD ($)	May. 30, 2015 USD ($)	May. 30, 2015 USD ($)	May. 31, 2014 USD ($) dealerships	Jun. 01, 2013 USD ($)
Business Acquisition
Long-term Line of Credit	$ 127.0
Goodwill				$ 303.1	$ 303.1	$ 303.1	$ 228.2	$ 227.0
Indefinite-lived intangible assets						55.1	$ 0.0
Goodwill, Purchase Accounting Adjustments				1.2
Wholly-owned Contract Furniture Dealership
Business Acquisition
Numbers of Business Divested | dealerships							4
Wholly-owned Contract Furniture Dealership | Oklahoma
Business Acquisition
Gain (Loss) on sale of contract dealerships							$ 1.3
Acquisition Of Design Within Reach (DWR) [Member]
Business Acquisition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				68.5	68.5	68.5
Business Acquisition, Transaction Costs						2.2
Purchase Price					155.2
Business Acquisition, Percentage of Voting Interests Acquired	81.00%
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 10.0
Goodwill				$ 75.6	$ 75.6	75.6
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Percent			4.00%
Purchase of noncontrolling interests			$ 5.8
Acquisition Of Design Within Reach (DWR) [Member] | Redeemable Noncontrolling Interest [Member]
Business Acquisition
Fair value of fully-vested options granted	$ 1.7
Dongguan Sun Hing Steel Furniture Factory LTD
Business Acquisition
Purchase Price		$ 8.2				$ 1.5	$ 6.7
Herman Miller Consumer Holdings Inc [Member] | Acquisition Of Design Within Reach (DWR) [Member]
Business Acquisition
Capital Contributed Percentage of Acquiree	15.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	7.00%

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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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