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Stockholders' Equity (Schedule of Assumptions Used in Estimate of Fair Value of Stock Option Awards) (Details) - Stock Options [Member] - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted-average exercise price per share | $ 77.12 | $ 72.01 | $ 79.12 | $ 78.91
Weighted-average grant date market value of Woodward stock | $ 77.12 | $ 72.01 | 79.12 | 78.91
Expected term | 6 years 6 months | 6 years 4 months 24 days |  |
Estimated volatility |  | 29.10% |  |
Estimated dividend yield |  | 0.80% |  |
Risk-free interest rate | 2.60% |  |  |
Minimum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted-average exercise price per share |  |  | 79.12 | 78.91
Weighted-average grant date market value of Woodward stock |  |  | $ 79.12 | $ 78.91
Expected term | 6 years 6 months | 6 years 4 months 24 days | 6 years 6 months | 6 years 4 months 24 days
Estimated volatility | 25.80% | 29.10% | 25.70% | 29.10%
Estimated dividend yield | 0.70% |  | 0.70% | 0.60%
Risk-free interest rate | 2.60% | 2.70% | 2.60% | 2.10%
Maximum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Expected term |  |  | 8 years 8 months 12 days | 8 years 8 months 12 days
Estimated volatility | 26.00% |  | 31.00% | 32.70%
Estimated dividend yield | 0.80% |  | 0.80% | 0.80%
Risk-free interest rate |  | 2.80% | 3.10% | 2.80%

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + 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 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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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. Weighted average price for all grants during the period. + References No definition available. + Details
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- Definition Price of a single share of a number of saleable stocks of a company used in the fair value assumptions. Weighted average price for grants during the period. + References No definition available. + Details
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