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Retirement Benefits (Narrative) (Details) - USD ($) shares in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2018 | Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  | $ 14,741,000 | $ 14,014,000
Treasury Stock Issued During Period, Shares, Employee Benefit Plans |  | 202 | 199
Total stockholders equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  | $ 14,741,000 | $ 14,014,000
Treasury Stock at Cost [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  | $ 7,584,000 | $ 7,513,000
Treasury Stock Issued During Period, Shares, Employee Benefit Plans |  | 202 | 199
Duarte Plan, Defined Benefit [Member] | Defined Benefit Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit, Lump Sum Buyout Benefits Paid, Current Year |  |  | $ 670,000
Defined Benefit, Lump Sum Buyout Benefits Paid, Expected | $ 0 |  |

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- Definition During the third quarter of fiscal year 2016, Woodward opened a lump-sum buy-out window for certain former U.S. employees and/or their dependents eligible to receive postretirement defined benefit pension payments for past employment services to the Company. Eligible pension plan participants may elect to receive a one-time lump-sum payment or an immediate annuity in lieu of future pension benefit payments. Amount represents the pension benefit payments under the lump-sum buy-out options during the fourth quarter of fiscal year 2016. + References No definition available. + Details
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- Definition During the third quarter of fiscal year 2016, Woodward opened a lump-sum buy-out window for certain former U.S. employees and/or their dependents eligible to receive postretirement defined benefit pension payments for past employment services to the Company. Eligible pension plan participants may elect to receive a one-time lump-sum payment or an immediate annuity in lieu of future pension benefit payments. Amount represents the estimated pension benefit payments under the lump-sum buy-out options expected to be paid in 2017. + References No definition available. + Details
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