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Stock-Based Compensation - Narrative (Details) |  | 12 Months Ended | 17 Months Ended
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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

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