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Earnings Per Share Earnings Per Share - Schedule of Calculation of Numerator and Denominator in Earnings Per Share (Details) - USD ($)
$ in Millions
 3 Months Ended
Aug. 29, 2015
Aug. 30, 2014
Earnings Per Share [Abstract]    
Numerator for both basic and diluted EPS, net earnings attributable to Herman Miller, Inc. - in millions $ 33.5 $ 25.2
Denominator for basic EPS, weighted-average common shares outstanding 59,733,924 59,295,859
Potentially dilutive shares resulting from stock plans 497,141 615,993
Denominator for diluted EPS 60,231,065 59,911,852
Antidilutive equity awards not included in weighted-average common shares - diluted 643,782 709,206