GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Change in the Carrying Amount of Goodwill by Segment

The change in the carrying amount of goodwill by segment is as follows:

In millions	Freight Segment		Transit Segment		Total
Balance at December 31, 2022	$	7,067	$	1,441	$	8,508
Additions	215		—		215
Disposals	(4)		—		(4)
Foreign currency impact	16		45		61
Balance at December 31, 2023	$	7,294	$	1,486	$	8,780
Additions	31		54		85
Disposals	(5)		(1)		(6)
Foreign currency impact	(72)		(77)		(149)
Balance at December 31, 2024	$	7,248	$	1,462	$	8,710

Summary of Intangible Assets of the Company, Other Than Goodwill and Trademarks

Intangible assets of the Company, other than goodwill and trade names, that are considered definitive lived consist of the following:

	December 31, 2024						December 31, 2023
In millions	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Backlog	$	1,415	$	(629)	$	786	$	1,431	$	(526)	$	905
Customer relationships	1,329		(480)		849		1,333		(431)		902
Acquired technology	1,318		(614)		704		1,283		(497)		786
Total	$	4,062	$	(1,723)	$	2,339	$	4,047	$	(1,454)	$	2,593

Summary of Estimated Amortization Expense Five Succeeding Years

Estimated amortization expense for the five succeeding years is as follows (in millions):

2025	$	277
2026	$	272
2027	$	267
2028	$	267
2029	$	266