Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 02, 2017	Dec. 03, 2016	Dec. 02, 2017	Dec. 03, 2016
Income Statement [Abstract]
Net sales	$ 604.6	$ 577.5	$ 1,184.8	$ 1,176.1
Cost of sales	382.5	359.5	745.8	728.1
Gross margin	222.1	218.0	439.0	448.0
Operating expenses:
Selling, general and administrative	152.4	149.0	299.6	303.2
Restructuring expenses and other charges	1.7	1.0	3.8	1.0
Design and research	18.0	18.4	36.5	37.8
Total operating expenses	172.1	168.4	339.9	342.0
Operating earnings	50.0	49.6	99.1	106.0
Other expenses:
Interest expense	3.7	3.9	7.4	7.6
Other, net	(0.7)	0.4	(1.8)	(0.2)
Earnings before income taxes and equity income	47.0	45.3	93.5	98.6
Income tax expense	14.3	14.5	28.5	31.6
Equity income from nonconsolidated affiliates, net of tax	0.8	0.8	1.5	1.1
Net earnings	33.5	31.6	66.5	68.1
Net earnings (loss) attributable to noncontrolling interests	0.0	(0.1)	0.0	0.1
Net earnings attributable to Herman Miller, Inc.	$ 33.5	$ 31.7	$ 66.5	$ 68.0
Earnings per share — basic	$ 0.56	$ 0.53	$ 1.11	$ 1.13
Earnings per share — diluted	0.55	0.53	1.10	1.13
Dividends declared, per share	$ 0.180	$ 0.170	$ 0.360	$ 0.340
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	$ 0.1	$ (5.7)
Pension and other post-retirement plans	0.8	0.3	$ 1.6	$ 1.6
Interest rate swaps	2.6	4.2	1.0	4.2
Other comprehensive income (loss)	3.5	(1.2)	7.1	(4.6)
Comprehensive income	37.0	30.4	73.6	63.5
Comprehensive income (loss) attributable to noncontrolling interests	0.0	(0.1)	0.0	0.1
Comprehensive income attributable to Herman Miller, Inc.	$ 37.0	$ 30.5	$ 73.6	$ 63.4