v3.23.4

Acquisitions - Additional Information (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Jul. 19, 2021 USD ($) $ / shares	May 28, 2022 USD ($)	Dec. 02, 2023 USD ($)	Jun. 03, 2023 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 1,227.6	$ 1,221.7
Knoll
Business Acquisition [Line Items]
Transaction costs		$ 30.0
Number of shares of Herman Miller, Inc. (now MillerKnoll, Inc.) 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
Total acquisition date fair value of consideration transferred	$ 1,887.3
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	903.5
Knoll \| Knoll
Business Acquisition [Line Items]
Goodwill	$ 903.5
Net decrease to goodwill		$ 22.4

Business Acquisition, Equity Interest Issued or Issuable, Number of New Shares For Each Outstanding Share

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Business Combination, Consideration Transferred, Replacement Share-Based Awards, Fair Value

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Business Combination, Consideration Transferred, Replacement Share-Based Awards, Fair Value, Future Services

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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MILLERKNOLL, INC. 10-Q