v3.26.1
Stock-Based Compensation - Narrative (Details) - USD ($)
 12 Months Ended 53 Months Ended
May 30, 2026
May 31, 2025
Jun. 01, 2024
May 30, 2026
Share-based Compensation Arrangement by Share-based Payment Award        
Stock-based compensation cost not yet recognized $ 15,100,000     $ 15,100,000
Weighted-average period over which this amount is expected to be recognized (in years) 1 year 3 months 18 days      
Employee stock purchase plan issuances (in shares) 174,824 155,758 139,211  
Granted (in shares) 0      
Cash received from the exercise of stock options $ 500,000      
IRS statutory compensation ceiling 360,000      
Recorded liability of the related Rabbi trust assets $ 22,800,000 $ 18,000,000.0   $ 22,800,000
Director        
Share-based Compensation Arrangement by Share-based Payment Award        
Granted (in shares) 0 9,905 8,377  
Executive Equalization Retirement Plan | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award        
Cash awards granted (as percent) 50.00%      
Percentage of incentive cash bonus 100.00%      
Employee Stock Purchase Program        
Share-based Compensation Arrangement by Share-based Payment Award        
Reserved for purchase by plan participants (as percent) 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) 5,500,000     5,500,000
Shares available for issuance ( in shares) 1,276,552     1,276,552
Employee Stock Purchase Program | Long Term Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award        
Number of shares authorized for issuance (in shares) 19,864,945     19,864,945
Shares available for issuance ( in shares) 6,540,967     6,540,967
Employee Stock Purchase Program | MillerKnoll, 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 | MillerKnoll, Inc. 2023 Long-Term Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award        
Number of shares authorized for issuance (in shares) 12,682,275     12,682,275
Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award        
Weighted-average period over which this amount is expected to be recognized (in years) 1 month 17 days      
Expiration period (in years) 10 years      
Granted (in shares) 0      
Intrinsic value of options exercised $ 100,000 $ 700,000 $ 400,000  
Stock Option | Director        
Share-based Compensation Arrangement by Share-based Payment Award        
Expiration period (in years) 10 years      
Conversion ratio to common stock 1      
Director fees to be paid in form of equity (as percent)       50.00%
Stock Option | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award        
Vesting period (in years) 1 year      
Stock Option | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award        
Vesting period (in years) 3 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 3 months 21 days      
Vesting period (in years) 3 years      
Conversion ratio to common stock 1      
Fair value of the shares that vested $ 18,100,000      
Granted (in dollar per share) $ 19.59 $ 28.24 $ 17.30  
Released (in shares) 968,092      
Restricted Stock Units | After year one        
Share-based Compensation Arrangement by Share-based Payment Award        
Graded vesting (as percent) 33.00%      
Restricted Stock Units | After year two        
Share-based Compensation Arrangement by Share-based Payment Award        
Graded vesting (as percent) 33.00%      
Restricted Stock Units | After year three        
Share-based Compensation Arrangement by Share-based Payment Award        
Graded vesting (as percent) 33.00%      
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) 1 year      
Expiration period (in years) 3 years      
Conversion ratio to common stock 1      
Fair value of the shares that vested $ 2,200,000      
Granted (in dollar per share) $ 18.83 28.04 18.39  
Total market value of shares released in period $ 10,000.00      
Released (in shares) 121,312      
Deferred Stock Units | Director        
Share-based Compensation Arrangement by Share-based Payment Award        
Granted (in dollar per share) $ 19.50 $ 22.79 $ 25.47  
Granted (in shares) 18,976      
Released (in shares) 18,312      
Share-based compensation arrangement by share-based payment award, non-option equity instruments, granted in period, fair value $ 300,000      
Deferred stock units outstanding (in shares) 75,434     75,434
Deferred stock units, vested, aggregate intrinsic fair value $ 1,200,000     $ 1,200,000