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Fair Value Measurements Fair Value Measurements - Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Aug. 31, 2019	Feb. 29, 2020	Mar. 02, 2019	Jun. 01, 2019
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests		$ 71.7
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				5.00%
Payments to Acquire Additional Interest in Subsidiaries		20.3	$ 10.1
Redemption value adjustment	$ 0.0
Redeemable Noncontrolling Interests, Ending		71.7
Herman Miller Consumer Holdings
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests	20.6	0.0	20.7	$ 20.6
Payments to Acquire Additional Interest in Subsidiaries		20.4
Purchase of HMCH redeemable noncontrolling interests		(20.4)	(10.1)
Redeemable Noncontrolling Interests, Beginning	20.6	20.6	30.5
Redemption value adjustment		(0.2)	0.0
Exercised options			0.2
Net income attributable to redeemable noncontrolling interests			0.1
Redeemable Noncontrolling Interests, Ending		0.0	$ 20.7
HAY
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests	0.0	71.7		$ 0.0
Redeemable Noncontrolling Interests, Beginning	$ 0.0	0.0
Increase due to HAY acquisition		72.1
Net income attributable to redeemable noncontrolling interests		(0.4)
Redeemable Noncontrolling Interests, Ending		$ 71.7

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