EARNINGS PER SHARE - Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Percent of income allocated to non-vested restricted stock	0.30%
Numerator
Net income attributable to Wabtec shareholders	$ 322	$ 272
Less: Net income allocated to non-vested restricted stock	(1)	(1)
Numerator for basic and diluted earnings per common share	321	271
Numerator for basic and diluted earnings per common share	$ 321	$ 271
Denominator
Weighted average shares outstanding- basic (in shares)	170.5	176.5
Weighted average shares outstanding- diluted (in shares)	171.3	177.2
Earnings per common share attributable to Wabtec shareholders
Basic (in dollars per share)	$ 1.88	$ 1.54
Diluted (in dollars per share)	$ 1.88	$ 1.53
Awards Excluding Restricted Stock
Denominator
Assumed conversion of dilutive stock-based compensation plans (in shares)	0.4	0.3
Restricted Stock
Denominator
Assumed conversion of dilutive stock-based compensation plans (in shares)	0.4	0.4

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- Definition

Net Income (Loss) Attributable To Parent, Percent Allocated To Non-Vested Restricted Stock

+ References

No definition available.

+ Details

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- Details

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- Details

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Namespace Prefix:
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Period Type: