Restructuring Activities Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 01, 2018	Sep. 02, 2017
Restructuring Reserve [Roll Forward]
Restructuring and impairment expenses	$ 1.1	$ 1.4
Restructuring and impairment expenses	1.1	1.4
ELA Furniture Solutions
Restructuring Cost and Reserve [Line Items]
Effect on Future Earnings, Amount	3.0
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0
Restructuring and impairment expenses	1.1
Payments	1.1
Ending Balance	0.0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	5.0
Restructuring and Related Cost, Cost Incurred to Date	5.0
Restructuring and Related Cost, Expected Cost Remaining	2.0
UNITED KINGDOM | ELA Furniture Solutions
Restructuring Reserve [Roll Forward]
Impairment of Long-Lived Assets to be Disposed of	0.7
CHINA | ELA Furniture Solutions
Restructuring Reserve [Roll Forward]
Restructuring and impairment expenses	$ 0.4
Herman Miller Consumer Holdings [Member] | North America [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		2.4
Restructuring and impairment expenses		1.4
Payments		1.8
Ending Balance		$ 2.0