XML 88 R73.htm IDEA: XBRL DOCUMENT
v3.20.4

LONG-TERM DEBT - Schedule of Line of Credit Facilities (Details) - USD ($) | Dec. 31, 2020 | Apr. 10, 2020 | Dec. 31, 2019 | Jun. 08, 2018
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Letters of Credit Under Credit Agreement | $ 736,600,000 |  | $ 714,000,000.0 |
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability | 144,000,000.0 |  |  |
Current Availability | 144,000,000.0 |  |  |
Revolving Credit Facility | 2018 Refinancing Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability | 1,200,000,000.0 |  |  |
Current Availability | 1,180,900,000 |  |  |
Line of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability |  | $ 600,000,000 |  |
Line of Credit | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability |  | $ 144,000,000.0 |  |
Letters of Credit Under Credit Agreement | 0 |  |  |
Line of Credit | Revolving Credit Facility | 2018 Refinancing Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability |  |  |  | $ 1,200,000,000.0
Letters of Credit Under Credit Agreement | $ 19,100,000 |  |  |

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

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=wab_TwoThousandandEighteenRefinancingAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |