XML 57 R45.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Retirement Benefits (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Estimated Remaining Cash Contributions |
﻿ |  |  |
﻿ |  |  |
﻿Retirement pension benefits: |  |  |
﻿United States |  | $ | -
﻿United Kingdom |  |  | 219
﻿Japan |  |  | -
﻿Other postretirement benefits |  |  | 2,636
﻿
Defined Benefit Pension Plan [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Net Periodic Benefit Costs |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three-Months Ended March 31,
﻿ |  | United States |  | Other Countries |  | Total
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Service cost |  | $ | 411 |  | $ | 418 |  | $ | 165 |  | $ | 187 |  | $ | 576 |  | $ | 605
﻿Interest cost |  |  | 1,501 |  |  | 1,439 |  |  | 344 |  |  | 296 |  |  | 1,845 |  |  | 1,735
﻿Expected return on plan assets |  |  | (2,903) |  |  | (2,633) |  |  | (717) |  |  | (638) |  |  | (3,620) |  |  | (3,271)
﻿Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net actuarial loss |  |  | 149 |  |  | 463 |  |  | 75 |  |  | 126 |  |  | 224 |  |  | 589
﻿Prior service cost |  |  | 178 |  |  | 96 |  |  | - |  |  | - |  |  | 178 |  |  | 96
﻿Net periodic retirement pension benefit |  | $ | (664) |  | $ | (217) |  | $ | (133) |  | $ | (29) |  | $ | (797) |  | $ | (246)
﻿Contributions paid |  | $ | - |  | $ | - |  | $ | 119 |  | $ | 101 |  | $ | 119 |  | $ | 101
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Six-Months Ended March 31,
﻿ |  | United States |  | Other Countries |  | Total
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Service cost |  | $ | 822 |  | $ | 837 |  | $ | 323 |  | $ | 379 |  | $ | 1,145 |  | $ | 1,216
﻿Interest cost |  |  | 3,002 |  |  | 2,878 |  |  | 673 |  |  | 592 |  |  | 3,675 |  |  | 3,470
﻿Expected return on plan assets |  |  | (5,807) |  |  | (5,265) |  |  | (1,403) |  |  | (1,279) |  |  | (7,210) |  |  | (6,544)
﻿Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net actuarial loss |  |  | 299 |  |  | 927 |  |  | 147 |  |  | 253 |  |  | 446 |  |  | 1,180
﻿Prior service cost |  |  | 355 |  |  | 192 |  |  | - |  |  | - |  |  | 355 |  |  | 192
﻿Net periodic retirement pension benefit |  | $ | (1,329) |  | $ | (431) |  | $ | (260) |  | $ | (55) |  | $ | (1,589) |  | $ | (486)
﻿Contributions paid |  | $ | - |  | $ | - |  | $ | 431 |  | $ | 466 |  | $ | 431 |  | $ | 466
﻿
Defined Contribution Plan [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Costs of Retirement Plans |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three-Months Ended |  | Six-Months Ended
﻿ |  | March 31, |  | March 31,
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Company costs |  | $ | 8,716 |  | $ | 8,502 |  | $ | 16,595 |  | $ | 15,751
﻿
Other Postretirement Benefit Plans [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Net Periodic Benefit Costs |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three-Months Ended |  | Six-Months Ended
﻿ |  | March 31, |  | March 31,
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Service cost |  | $ | 2 |  | $ | 3 |  | $ | 4 |  | $ | 7
﻿Interest cost |  |  | 291 |  |  | 311 |  |  | 583 |  |  | 622
﻿Amortization of: |  |  |  |  |  |  |  |  |  |  |  |
﻿Net actuarial loss |  |  | 24 |  |  | 51 |  |  | 48 |  |  | 101
﻿Prior service benefit |  |  | (39) |  |  | (39) |  |  | (79) |  |  | (79)
﻿Curtailment gain |  |  | - |  |  | - |  |  | (330) |  |  | -
﻿Net periodic other postretirement cost |  | $ | 278 |  | $ | 326 |  | $ | 226 |  | $ | 651
﻿Contributions paid |  | $ | 1,009 |  | $ | 804 |  | $ | 1,235 |  | $ | 1,419
﻿
Multiemployer Plans, Pension [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Costs of Retirement Plans |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three-Months Ended |  | Six-Months Ended
﻿ |  | March 31, |  | March 31,
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Company contributions |  | $ | 87 |  | $ | 79 |  | $ | 167 |  | $ | 147
﻿

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_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the cash contributions to retirement benefit plans. The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
Name: | wwd_ScheduleOfCashContributionsToRetirementBenefitPlanTableTextBlock
Namespace Prefix: | wwd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

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

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

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