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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
	Aug. 31, 2019	Sep. 01, 2018
Earnings Per Share [Abstract]
Numerator for both basic and diluted EPS, Net earnings attributable to Herman Miller, Inc. - in millions	$ 48.2	$ 35.8
Denominator for basic EPS, weighted-average common shares outstanding	58,909,001	59,370,160
Potentially dilutive shares resulting from stock plans	322,727	498,954
Denominator for diluted EPS	59,231,728	59,869,114
Antidilutive equity awards not included in weighted-average common shares - diluted	123,088	161,457

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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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