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Earnings Per Share - Schedule of Calculation of Numerator and Denominator in Earnings Per Share (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 03, 2022	Aug. 28, 2021
Numerators:
Numerator for both basic and diluted EPS, Net earnings (loss) attributable to MillerKnoll, Inc. - in millions	$ 25.8	$ (61.4)
Denominators:
Denominator for basic EPS, weighted-average common shares outstanding (in shares)	75,482,572	66,302,214
Potentially dilutive shares resulting from stock plans (in shares)	784,394	0
Denominator for diluted EPS (in shares)	76,266,966	66,302,214
Antidilutive equity awards not included in weighted-average common shares - diluted (in shares)	0	1,328,275

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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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