XML 84 R72.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Segment Information - Sales by Product (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Total sales | $ 916,034 | $ 772,031
Specialty Products & Electronics |  |
Segment Reporting Information [Line Items] |  |
Total sales | 315,067 | 378,269
Transit Products |  |
Segment Reporting Information [Line Items] |  |
Total sales | 258,419 | 48,795
Brake Products |  |
Segment Reporting Information [Line Items] |  |
Total sales | 180,459 | 158,033
Remanufacturing, Overhaul & Build |  |
Segment Reporting Information [Line Items] |  |
Total sales | 129,058 | 151,906
Other |  |
Segment Reporting Information [Line Items] |  |
Total sales | $ 33,031 | $ 35,028

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_ProductOrServiceAxis=wab_ElectronicsAndOtherFreightRelatedProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=wab_TransitProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=wab_BrakeProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=wab_RemanufacturingOverhaulAndBuildMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=wab_AllOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |