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Stock-Based Compensation - Narrative (Details)
 12 Months Ended 17 Months Ended
Jul. 19, 2021
Jun. 03, 2023
USD ($)
$ / shares
shares
May 28, 2022
USD ($)
$ / shares
shares
May 29, 2021
USD ($)
$ / shares
shares
Jun. 03, 2023
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award          
Stock-based compensation cost not yet recognized | $   $ 11,500,000     $ 11,500,000
Weighted-average period over which this amount is expected to be recognized (in years)   10 months 24 days      
Employee stock purchase plan issuances (shares)   185,551 87,562 71,468  
Cash received from the exercise of stock options | $   $ 1,000,000      
IRS statutory compensation ceiling | $   $ 330,000      
Knoll Inc. 2020 Long Term Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Shares available for issuance ( in shares)   3,327,940     3,327,940
Executive Equalization Retirement Plan | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award          
Cash awards granted (percent)   50.00%      
Percentage of incentive cash bonus   100.00%      
Employee stock purchase program          
Share-based Compensation Arrangement by Share-based Payment Award          
Number of shares authorized for issuance (in shares)   8,164,945     8,164,945
Reserved for purchase by plan participants (percentage)   85.00%     85.00%
Employee stock purchase program | Miller Knoll Inc. Employee Stock Purchase Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Number of shares authorized for issuance (in shares)   3,666,018     3,666,018
Shares available for issuance ( in shares)   246,338     246,338
Employee stock purchase program | Knoll Inc. 2020 Long Term Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Number of shares authorized for issuance (in shares)   7,182,670     7,182,670
Employee stock purchase program | Knoll Inc. 2021 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Number of shares authorized for issuance (in shares)   982,275     982,275
Shares available for issuance ( in shares)   530,684     530,684
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award          
Weighted-average period over which this amount is expected to be recognized (in years)   6 months 14 days      
Intrinsic value of options exercised | $   $ 400,000 $ 1,800,000 $ 500,000  
Stock options | Director          
Share-based Compensation Arrangement by Share-based Payment Award          
Vesting period (in years)   1 year      
Expiration period (in years)   10 years      
Conversion ratio to common stock   1      
Director fees to be paid in form of equity (percent)         50.00%
Stock options | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award          
Vesting period (in years)   1 year      
Stock options | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award          
Vesting period (in years)   3 years      
Expiration period (in years)   10 years      
Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award          
Weighted-average period over which this amount is expected to be recognized (in years)   1 year 1 month 6 days      
Vesting period (in years) 3 years 3 years      
Conversion ratio to common stock 1 1      
Fair value of the shares that vested | $   $ 6,000,000      
Share-based payment arrangement, cash used to settle award | $   $ 60,000      
Granted (in usd per share) | $ / shares   $ 27.76 $ 44.25 $ 26.71  
Weighted-average fair value of restricted stock awards granted (in usd per share) | $ / shares   $ 31.83 $ 37.33   $ 31.83
Granted (in shares)   406,720      
Deferred stock units outstanding (shares)   684,341 576,382   684,341
Restricted stock units | After year one          
Share-based Compensation Arrangement by Share-based Payment Award          
Graded vesting (percent)   25.00%      
Restricted stock units | After year two          
Share-based Compensation Arrangement by Share-based Payment Award          
Graded vesting (percent)   25.00%      
Restricted stock units | After year three          
Share-based Compensation Arrangement by Share-based Payment Award          
Graded vesting (percent)   50.00%      
Restricted stock units | Knoll Award          
Share-based Compensation Arrangement by Share-based Payment Award          
Share-based payment arrangement, cash used to settle award | $   $ 74,000      
Performance share units          
Share-based Compensation Arrangement by Share-based Payment Award          
Weighted-average period over which this amount is expected to be recognized (in years)   8 months 4 days      
Expiration period (in years) 5 years 3 years      
Conversion ratio to common stock 1 1      
Granted (in usd per share) | $ / shares   $ 27.30 $ 43.06 $ 37.21  
Total market value of shares released in period | $   $ 167,000      
Additional shares vested in period (in shares)   0      
Accrued cash dividends on the underlying shares of outstanding | $   $ 200,000      
Weighted-average fair value of restricted stock awards granted (in usd per share) | $ / shares   $ 34.41 $ 42.75   $ 34.41
Granted (in shares)   172,645      
Deferred stock units outstanding (shares)   350,971 364,087   350,971
Restricted stock awards          
Share-based Compensation Arrangement by Share-based Payment Award          
Weighted-average period over which this amount is expected to be recognized (in years)   8 months 12 days      
Vesting period (in years)   3 years      
Conversion ratio to common stock 1        
Fair value of the shares that vested | $   $ 3,700,000      
Share-based payment arrangement, cash used to settle award | $   $ 60,000      
Granted (in usd per share) | $ / shares   $ 0      
Accelerated vesting, number of shares   500,000      
Weighted-average fair value of restricted stock awards granted (in usd per share) | $ / shares   $ 44.36 $ 44.36   $ 44.36
Granted (in shares)   0   0  
Deferred stock units outstanding (shares)   34,743 219,989   34,743
Restricted stock awards | Knoll Award          
Share-based Compensation Arrangement by Share-based Payment Award          
Share-based payment arrangement, cash used to settle award | $   $ 400,000      
Deferred stock units | Director          
Share-based Compensation Arrangement by Share-based Payment Award          
Fair value of the shares that vested | $   $ 600,000      
Granted (in usd per share) | $ / shares   $ 22.73 $ 37.34    
Granted (in shares)   25,230 15,664  
Deferred stock units outstanding (shares)   41,824     41,824
Deferred stock units, vested, aggregate intrinsic fair value | $   $ 600,000     $ 600,000