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v3.19.3.a.u2

Fair Value Measurements Fair Value Measurements (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 12, 2017 | Sep. 30, 2016 | Nov. 30, 2019 | Aug. 31, 2019 | Dec. 01, 2018 | Sep. 01, 2018 | Nov. 30, 2019 | Dec. 01, 2018 | Nov. 28, 2020 | Jun. 01, 2019
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Debt conversion rate |  | 1.949% |  |  |  |  |  |  |  |
Interest rate swaps |  |  | $ 3,400,000 |  | $ 1,000,000.0 |  | $ (5,300,000) | $ 500,000 |  |
Other Comprehensive Income (Loss), Net of Tax |  |  | 17,800,000 | $ (17,300,000) | (3,100,000) | $ (7,800,000) | 500,000 | (10,900,000) |  |
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net |  |  | 0 |  | 0 |  | 0 | 0 |  |
Other comprehensive income (loss), reclassification adjustment from aoci on derivatives, before tax |  |  | 0 |  | $ 100,000 |  | 100,000 | 0 |  |
Redeemable Noncontrolling Interest, Equity, Carrying Amount |  |  | 0 |  |  |  | 0 |  |  | $ 20,600,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  |  |  | 5.00%
Payments to Acquire Additional Interest in Subsidiaries |  |  |  |  |  |  | 20,300,000 | 10,100,000 |  |
Herman Miller Consumer Holdings |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  |  |  |  |  |  | 20,400,000 |  |  |
Interest rate swap agreement |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Liability, Notional Amount | $ 75,000,000.0 | $ 150,000,000.0 |  |  |  |  |  |  |  |
Debt conversion rate | 2.387% |  |  |  |  |  |  |  |  |
Other Liabilities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Interest rate swap agreement |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate swap agreement - liability |  |  | $ 8,300,000 |  |  |  | 8,300,000 |  |  | $ 2,200,000
Scenario, Forecast |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Gross Amount to be Transferred |  |  |  |  |  |  |  |  | $ 900,000 |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred |  |  |  |  |  |  |  |  | $ 700,000 |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  | $ (5,300,000) | $ 500,000 |  |

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