XML 93 R81.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Retirement Benefits (Schedule of estimated remaining cash contributions) (Details) $ in Thousands | Mar. 31, 2018 USD ($)
--- | ---
Other Postretirement Benefit Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Estimated future employer contributions in the currect fiscal year | $ 2,636
UNITED STATES | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Estimated future employer contributions in the currect fiscal year | 0
UNITED KINGDOM | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Estimated future employer contributions in the currect fiscal year | 219
JAPAN | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Estimated future employer contributions in the currect fiscal year | $ 0

X
- 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
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=wwd_DefinedBenefitPensionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |