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Acquisitions and Divestitures (Details) - USD ($) $ in Millions					4 Months Ended	10 Months Ended	12 Months Ended
	Jul. 31, 2017	Jan. 01, 2017	Sep. 17, 2015	Jul. 28, 2014	Nov. 29, 2014	May 30, 2015	Jun. 03, 2017	May 28, 2016	May 30, 2015
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses	$ 2.0
Goodwill						$ 303.1	$ 304.5	$ 305.3	$ 303.1
Purchase of noncontrolling interests							$ (1.5)	0.0	(5.8)
Nelson Bubble Lamp Product Line [Member]
Business Acquisition [Line Items]
Purchase Price			$ 3.6
Contingent consideration			2.7
Acquisition Of Design Within Reach (DWR) [Member]
Business Acquisition [Line Items]
Purchase Price				$ 155.2		155.2
Goodwill				$ 75.6
Business Acquisition, Percentage of Voting Interests Acquired				81.00%
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Percent					4.00%
Purchase of noncontrolling interests					$ 5.8
Business Acquisition, Transaction Costs									2.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				$ 68.5
Herman Miller Consumer Holdings Inc | Acquisition Of Design Within Reach (DWR) [Member]
Business Acquisition [Line Items]
Capital Contributed Percentage of Acquiree				15.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				7.00%
Noncontrolling Interest, Put Option Purchase Period from Date of Issuance				5 years
Contract-Based Intangible Assets | Nelson Bubble Lamp Product Line [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 2.5
Useful Life			10 years
Customer Relationships
Business Acquisition [Line Items]
Useful Life							9 years
Customer Relationships | Nelson Bubble Lamp Product Line [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 0.6
Useful Life			10 years
Customer Relationships | Acquisition Of Design Within Reach (DWR) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 12.0
Consumer
Business Acquisition [Line Items]
Goodwill						$ 75.6	$ 78.8	$ 78.8	$ 75.6
Consumer | Nelson Bubble Lamp Product Line [Member]
Business Acquisition [Line Items]
Goodwill			$ 3.2
PENNSYLVANIA | Wholly-owned contract furniture dealership
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses		$ 3.0
Gain (Loss) on Disposition of Business							(0.7)
Accounts and Notes Receivable, Net							$ 1.4

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