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Acquisitions - Additional Information (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 19, 2021 USD ($) $ / shares | Nov. 27, 2021 USD ($) | Nov. 27, 2021 USD ($) | May 28, 2022 USD ($) | Dec. 03, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  |  | $ 1,226.2 | $ 1,217.4
Knoll |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Transaction costs |  | $ 0.9 | $ 27.6 | $ 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 |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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