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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		9 Months Ended
	Feb. 29, 2020	Mar. 02, 2019	Feb. 29, 2020	Mar. 02, 2019
Earnings Per Share [Abstract]
Numerator for both basic and diluted EPS, Net earnings attributable to Herman Miller, Inc. - in millions	$ 37.7	$ 39.2	$ 164.5	$ 114.5
Denominator for basic EPS, weighted-average common shares outstanding	58,940,060	58,838,958	58,970,264	59,087,899
Potentially dilutive shares resulting from stock plans	278,041	288,300	296,665	360,395
Denominator for diluted EPS	59,218,101	59,127,258	59,266,929	59,448,294
Antidilutive equity awards not included in weighted-average common shares - diluted	164,443	401,811	74,932	211,097

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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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