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BUSINESS (Details)	9 Months Ended
	Sep. 30, 2025 country
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of countries company operates	50
Number of countries where product is found (more than)	100

X

- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of countries where product found.

+ References

No definition available.

+ Details

Name:	wab_NumberOfCountriesWhereProductFound
Namespace Prefix:	wab_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration