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Retirement Benefits (Narrative) (Details) $ in Thousands | 12 Months Ended
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Sep. 30, 2025 USD ($) yr shares | Sep. 30, 2024 USD ($) shares | Sep. 30, 2023 USD ($) shares | Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Percentage of annual contribution equal to eligible prior year wages | 5.00% |  |  |
Common shares issued from treasury to settle benefit obligations | $ 24,912 | $ 21,889 | $ 19,466 |
Shares of woodward stock held in woodward retirement savings plan | shares | 2,085,000 | 2,222,000 |  |
Accrued liabilities | $ 22,010 | $ 19,532 |  |
Treasury Stock [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Common shares issued from treasury to settle benefit obligations | 6,534 | 7,922 | 8,523 |
Common shares issued from treasury to settle benefit obligations | $ 24,058 | $ 21,889 | $ 19,466 |
Common shares issued from treasury stock for benefit plans, shares | shares | 131,000 | 159,000 | 188,000 |
Common shares issued from treasury stock for benefit plans, shares | shares | 126,000 | 159,000 | 188,000 |
Defined Benefit Pension Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Current portion of pension obligation | $ 1,372 | $ 1,166 |  |
Projected benefit obligation | 212,235 | 218,302 | $ 194,485 |
Fair value of plan assets | 235,141 | 237,393 | 206,145 |
Defined Benefit Pension Plan [Member] | Cash and Cash Equivalents |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of plan assets | $ 13,513 | 5,500 |  |
Defined Benefit Pension Plan [Member] | Pooled funds: Index linked U.K. government securities fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of plan assets |  | 12,049 |  |
Defined Benefit Pension Plan [Member] | Pooled funds: Index linked U.K. long-term government securities fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of plan assets |  | 14,924 |  |
Defined Benefit Pension Plan [Member] | United States [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Discount rate support/source data | In the United States, Woodward uses a bond portfolio matching analysis based on recently traded, non-callable bonds rated AA or better that have at least $50 million outstanding to determine the benefit obligations at year end |  |  |
Convergence period | 5 years |  |  |
Long term rate | 0.75 |  |  |
Projected benefit obligation | $ 133,608 | 140,955 | 127,222 |
Fair value of plan assets | 178,583 | 179,917 | 155,370 |
Accumulated benefit obligation | 133,608 |  |  |
Estimated future employer contributions in the next fiscal year | 433 |  |  |
Defined Benefit Pension Plan [Member] | Foreign Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Current portion of pension obligation | $ 1,372 | 1,166 |  |
Discount rate support/source data | In the United Kingdom, Germany, and Japan, Woodward uses a high-quality corporate bond yield curve matched with separate cash flows to develop a single rate to determine the single rate equivalent to settle the entire benefit obligations in each jurisdiction. For the fiscal years ended September 30, 2025 and 2024, the discount rate used to determine periodic service cost and interest cost components of the overall benefit costs was based on spot rates derived from the same high-quality corporate bond yield curve used to determine the September 30, 2024 and 2023 benefit obligation, respectively, matched with separate cash flows for each future year |  |  |
Projected benefit obligation | $ 78,627 | 77,347 | 67,263 |
Fair value of plan assets | 56,558 | 57,476 | 50,775 |
Defined Benefit Pension Plan [Member] | United Kingdom |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation | 36,377 |  |  |
Fair value of plan assets | 47,208 |  |  |
Accumulated benefit obligation | 35,912 |  |  |
Estimated future employer contributions in the next fiscal year | 305 |  |  |
Defined Benefit Pension Plan [Member] | Japan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation | 6,246 |  |  |
Fair value of plan assets | 9,350 |  |  |
Accumulated benefit obligation | 5,280 |  |  |
Estimated future employer contributions in the next fiscal year | 150 |  |  |
Defined Benefit Pension Plan [Member] | Germany [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation | 36,004 |  |  |
Fair value of plan assets | 0 |  |  |
Accumulated benefit obligation | 36,004 |  |  |
Estimated future employer contributions in the next fiscal year | $ 1,386 |  |  |
Defined Benefit Pension Plan [Member] | Japan And United Kingdom [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Annual improvement rate | 1.5 |  |  |
Other Postretirement Benefit Plans [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Current portion of pension obligation | $ 1,576 | 1,668 |  |
Net periodic retirement (benefit) cost | 276 | 347 | 410 |
Projected benefit obligation | 14,193 | 15,203 | $ 15,336 |
Accumulated benefit obligation | $ 14,193 | 15,203 |  |
Option to elect company provided medical insurance coverage up to this age and a Medicare supplemental plan after this age | yr | 65 |  |  |
Age employees were eligible to participate in plan | yr | 55 |  |  |
Defined benefit plan, minimum years of service required for employees to be eligible for benefits |  |  |  | 10 years
Approximate number of retired employees and their covered dependents and beneficiaries currently providing postretirement benefits | 3 |  |  |
Approximate number of active employees and their covered dependants and beneficiaries who may receive postretirement benefits in the future | 304 |  |  |
As a result of a plan amendment, all postretirement medical benefits are fully insured for retirees who have attained this age | 65 |  |  |
Other Postretirement Benefit Plans [Member] | United States [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Discount rate support/source data | Woodward used a bond portfolio matching analysis based on recently traded, non-callable bonds rated AA or better that have at least $50 million outstanding to determine the benefit obligations at year end |  |  |
Convergence period | 5 years |  |  |
Long term rate | 0.75 |  |  |
Woodward Retirement Savings Plan [Member] | United States [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated benefit obligation |  | 140,955 |  |
Woodward Retirement Savings Plan [Member] | United Kingdom |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated benefit obligation |  | 33,766 |  |
Woodward Retirement Savings Plan [Member] | Japan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated benefit obligation |  | 5,958 |  |
Woodward Retirement Savings Plan [Member] | Germany [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated benefit obligation |  | $ 36,380 |  |

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- Definition As the result of a plan amendment in fiscal year 2009, all the postretirement medical plans are fully insured for retirees who have attained this age. + References No definition available. + Details
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- Definition Employees who had attained this age and had rendered the required years of service before the plans were frozen are eligible for benefits. + References No definition available. + Details
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- Definition The number of active employees and their covered dependants and beneficiaries that the plan may provide benefits for in the future if the employee elects for participate. + References No definition available. + Details
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- Definition The number of retired employees and their covered dependants and beneficiaries that the plan provides benefits for. + References No definition available. + Details
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- Definition Benefit in defined benefit plan that provides the option to elect company provided medical insurance coverage to this age and a Medicare supplemental plan after this age. + References No definition available. + Details
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- Definition Employees who had attained the required age and had rendered this many years or moere of service before the plans were frozen are eligible for benefits. + References No definition available. + Details
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- Definition Mortality Assumption Scale Convergence Period + References No definition available. + Details
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- Definition Stock issued during period value stock contribution obligation. + References No definition available. + Details
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