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Stock-Based Compensation (Details) $ in Millions | 3 Months Ended
--- | ---
Aug. 29, 2015 USD ($) shares | Aug. 30, 2014 USD ($) shares
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Allocated Share-based Compensation Expense | $ | $ 4.0 | $ 3.0
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense | $ | $ 1.4 | $ 1.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 17,390 | 30,878
Common Stock, Capital Shares Reserved for Future Issuance | 4,000,000 |
Percent of Market Price | 85.00% |
Restricted Stock Units (RSUs) |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised | 160,319 | 112,615
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Conversion Ratio to Common Stock | 1 |
Performance Share Units |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised | 55,825 | 0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Conversion Ratio to Common Stock | 1 |
Employee Stock Option |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |
Restricted Stock Grants |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |
Minimum | Restricted Stock Units (RSUs) |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |
Minimum | Employee Stock Option |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |
Maximum | Restricted Stock Units (RSUs) |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |
Maximum | Employee Stock Option |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |
Herman Miller Consumer Holdings | Minimum | Employee Stock Option |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |
Herman Miller Consumer Holdings | Maximum | Employee Stock Option |  |
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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