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Stock-Based Compensation HMCH Stock-Based Compensation - Schedule of Fair Value of Employee Stock Options (Details) - $ / shares |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 22, 2018 | Jul. 16, 2018 | Jul. 18, 2017 | Jul. 19, 2016 | Jun. 02, 2018
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Risk-free interest rate | 3.00% | 3.00% | 2.00% | 1.00% |
Expected term of options | 4 years 4 months 24 days | 4 years 4 months 24 days | 4 years 7 months 6 days | 4 years |
Expected volatility | 27.00% | 27.00% | 26.00% | 26.00% |
Employee Stock Option | Herman Miller Consumer Stock Option Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Risk-free interest rate |  |  |  |  | 2.29%
Expected term of options |  |  |  |  | 1 year 29 days
Expected volatility |  |  |  |  | 35.00%
Strike Price (usd per share) |  |  |  |  | $ 30.64
Per share value (usd per share) |  |  |  |  | $ 8.24

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- Definition Share-Based Compensation Arrangement by Share-based Payment Award, Stock Options, Weighted Average Year End Fair Value + References No definition available. + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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