CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income attributable to Wabtec shareholders	$ 362	$ 322
Foreign currency translation (loss) gain	(74)	116
Unrealized gain (loss) on derivative contracts	1	(3)
0	0	(1)
Other comprehensive (loss) income before tax	(73)	112
Income tax benefit related to components of other comprehensive income	0	1
Other comprehensive (loss) income, net of tax	(73)	113
Comprehensive income attributable to Wabtec shareholders	$ 289	$ 435