CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net sales:
Total net sales	$ 7,822	$ 7,556	$ 8,200
Cost of sales:
Total cost of sales	(5,453)	(5,419)	(5,922)
Gross profit	2,369	2,137	2,278
Operating expenses:
Selling, general and administrative expenses	(1,030)	(948)	(1,167)
Engineering expenses	(176)	(162)	(210)
Amortization expense	(287)	(282)	(238)
Total operating expenses	(1,493)	(1,392)	(1,615)
Income from operations	876	745	663
Other income and expenses:
Interest expense, net	(177)	(199)	(219)
Other income, net	38	11	3
Income before income taxes	737	557	447
Income tax expense	(172)	(145)	(120)
Net income	565	412	327
Less: Net (income) loss attributable to noncontrolling interest	(7)	2	0
Net income attributable to Wabtec shareholders	$ 558	$ 414	$ 327
Basic
Net income attributable to Wabtec shareholders (in dollars per share)	$ 2.96	$ 2.18	$ 1.91
Diluted
Net income attributable to Wabtec shareholders (in dollars per share)	$ 2.96	$ 2.17	$ 1.84
Weighted average shares outstanding
Basic (in shares)	187.7	189.9	170.5
Diluted (in shares)	188.1	190.4	177.3
Product
Net sales:
Total net sales	$ 6,205	$ 6,233	$ 6,908
Cost of sales:
Total cost of sales	(4,545)	(4,629)	(5,128)
Services
Net sales:
Total net sales	1,617	1,323	1,292
Cost of sales:
Total cost of sales	$ (908)	$ (790)	$ (794)