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Fair Value Measurements Fair Value Measurements (Details) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 12, 2017	Sep. 30, 2016	Aug. 31, 2019	Sep. 01, 2018	Aug. 29, 2020	Jun. 01, 2019
Derivative [Line Items]
Interest rate swaps			$ (8,800,000)	$ (500,000)
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net			0	0
Other comprehensive income (loss), reclassification adjustment from aoci on derivatives, before tax			200,000	0
Redeemable Noncontrolling Interest, Equity, Carrying Amount			0			$ 20,600,000
Payments to Acquire Additional Interest in Subsidiaries			19,800,000	10,000,000.0
Herman Miller Consumer Holdings
Derivative [Line Items]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests			20,400,000	$ (10,000,000.0)
Interest rate swap agreement
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 75,000,000.0	$ 150,000,000.0
Debt conversion rate	2.387%	1.949%
Other Liabilities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Interest rate swap agreement
Derivative [Line Items]
Interest rate swap agreement - liability			$ 12,700,000			$ 2,200,000
Scenario, Forecast
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Gross Amount to be Transferred					$ 600,000
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred					$ 500,000

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Nominal or face amount used to calculate payments on the derivative liability.

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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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