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Acquisitions - Additional Information (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 19, 2021 USD ($) $ / shares | May 28, 2022 USD ($) | Mar. 02, 2024 USD ($) | Jun. 03, 2023 USD ($)
Business Acquisition [Line Items] |  |  |  |
Goodwill |  |  | $ 1,225.9 | $ 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 |  |

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