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Earnings Per Share Earnings Per Share - Schedule of Calculation of Numerator and Denominator in Earnings Per Share (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 01, 2018	Sep. 02, 2017
Earnings Per Share [Abstract]
Numerator for both basic and diluted EPS, Net earnings attributable to Herman Miller, Inc. - in millions	$ 35.8	$ 33.1
Denominator for basic EPS, weighted-average common shares outstanding	59,370,160	59,758,610
Potentially dilutive shares resulting from stock plans	498,954	570,659
Denominator for diluted EPS	59,869,114	60,329,269
Antidilutive equity awards not included in weighted-average common shares - diluted	161,457	536,418

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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