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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 9 Months Ended
Feb. 27, 2016
Feb. 28, 2015
Feb. 27, 2016
Feb. 28, 2015
Earnings Per Share [Abstract]        
Numerator for both basic and diluted EPS, net earnings attributable to Herman Miller, Inc. - in millions $ 27.9 $ 21.0 $ 96.1 $ 74.1
Denominator for basic EPS, weighted-average common shares outstanding 59,885,597 59,550,289 59,837,132 59,430,575
Potentially dilutive shares resulting from stock plans 565,251 547,900 569,544 566,292
Denominator for diluted EPS 60,450,848 60,098,189 60,406,676 59,996,867
Antidilutive equity awards not included in weighted-average common shares - diluted 531,021 676,405 585,770 703,364