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SUBSEQUENT EVENT (Details) - Subsequent Event - Forecast
$ / shares in Units, $ in Millions
3 Months Ended
Sep. 30, 2021
USD ($)
$ / shares
Rate
Herman Miller Inc.  
Subsequent Event [Line Items]  
Merger agreement, termination fee | $ $ 43.0
Herman Miller Inc.  
Subsequent Event [Line Items]  
Value of cash received upon conversion (in usd per share) | $ / shares $ 11.00
Modification of share-based compensation awards of acquiree, performance measurement achievement, percentage 100.00%
Herman Miller Inc. | Common Stock  
Subsequent Event [Line Items]  
Number of shares received upon conversion of outstanding common stock (in shares) | Rate 32.00%
Herman Miller Inc. | Preferred Stock | Investindustrial VII L.P  
Subsequent Event [Line Items]  
Sale of stock, price per share (in usd per share) | $ / shares $ 25.06
Cash consideration price | $ $ 253.0