Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 30, 2015	Feb. 28, 2015	Nov. 29, 2014	Aug. 30, 2014	May 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	May 28, 2016	May 30, 2015	May 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 582.6	$ 536.5	$ 580.4	$ 565.4	$ 550.7	$ 516.4	$ 565.4	$ 509.7	$ 487.5	$ 455.9	$ 470.5	$ 468.1	$ 2,264.9	$ 2,142.2	$ 1,882.0
Gross margin	225.2	207.8	224.4	216.8	209.6	190.5	205.7	185.6	179.1	162.9	118.9	170.0	874.2	791.4	631.0
Net earnings attributable to Herman Miller, Inc. (1)	$ 40.7	$ 27.9	$ 34.7	$ 33.5	$ 23.4	$ 21.0	$ 27.8	$ 25.2	$ 16.6	$ 19.4	$ (80.6)	$ 22.5	$ 136.7	$ 97.5	$ (22.1)
Earnings per share-basic	$ 0.68	$ 0.46	$ 0.58	$ 0.56	$ 0.39	$ 0.35	$ 0.47	$ 0.43	$ 0.28	$ 0.33	$ (1.37)	$ 0.38	$ 2.28	$ 1.64	$ (0.37)
Earnings per share-diluted	$ 0.67	$ 0.46	$ 0.57	$ 0.56	$ 0.39	$ 0.35	$ 0.46	$ 0.42	$ 0.28	$ 0.33	$ (1.37)	$ 0.38	$ 2.26	$ 1.62	$ (0.37)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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