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Acquisitions - Additional Information (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Jul. 19, 2021 USD ($) $ / shares	Aug. 28, 2021 USD ($)	Aug. 28, 2021 USD ($)	Aug. 29, 2020 USD ($)	May 29, 2021 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 1,283.9	$ 1,283.9		$ 364.2
Net (loss) earnings			$ (59.9)	$ 73.4
Knoll
Business Acquisition [Line Items]
Transaction costs	$ 26.7
Number of shares of Herman Miller stock to be issued for each issued and outstanding share of Knoll	0.32
Business acquisition, share price (in dollar per share) | $ / shares	$ 11.00
Aggregate cash paid to acquire business	$ 1,176.6
Fair value of replacement share awards	53.4
Amount preliminarily allocated to purchase price	22.4
Amount allocated to future services and to be expensed over remaining service periods	31.0
Goodwill	925.9
Revenues		156.4
Net (loss) earnings		$ 45.9
Knoll | Knoll
Business Acquisition [Line Items]
Goodwill	$ 925.9

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Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

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