XML 90 R76.htm IDEA: XBRL DOCUMENT
v3.24.0.1

EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Costs recognized under defined contribution plans | $ 60 | $ 55 | $ 55
Number of shares held on behalf of participants (in shares) | 355 | 371 |
Market value of the shares held on behalf of participants | $ 45 | $ 37 |
U.S. | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Aggregate accumulated benefit obligation | $ 55 | 28 |
U.S. | Defined Benefit Pension Plans | Equity security funds |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Target asset allocation (as a percent) | 11.00% |  |
U.S. | Defined Benefit Pension Plans | Debt security funds |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Target asset allocation (as a percent) | 88.00% |  |
U.S. | Defined Benefit Pension Plans | Other Investments |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Target asset allocation (as a percent) | 1.00% |  |
International | Defined Benefit Pension Plans |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Aggregate accumulated benefit obligation | $ 241 | $ 227 |
Contribution to the plan | $ 2 |  |
International | Defined Benefit Pension Plans | Equity security funds |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Target asset allocation (as a percent) | 10.00% |  |
International | Defined Benefit Pension Plans | Debt security funds |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Target asset allocation (as a percent) | 15.00% |  |
International | Defined Benefit Pension Plans | Other Investments |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] |  |  |
Target asset allocation (as a percent) | 75.00% |  |

X
- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Benefit Plans And Other Postretirement Benefit Plans [ Line Items ] + References No definition available. + Details
Name: | wab_DefinedBenefitPlansAndOtherPostretirementBenefitPlansLineItems
Namespace Prefix: | wab_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan, Market value of the shares held on behalf of participants + References No definition available. + Details
Name: | wab_DefinedContributionPlanMarketValueOfSharesHeldOnBehalfOfParticipants
Namespace Prefix: | wab_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Contribution Plan, Number of shares held on behalf of participants. + References No definition available. + Details
Name: | wab_DefinedContributionPlanNumberOfSharesHeldOnBehalfOfParticipants
Namespace Prefix: | wab_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanDebtSecurityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_OtherInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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