GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

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, 2021	$	7,073	$	1,514	$	8,587
Additions/adjustments	1		(2)		(1)
Foreign currency impact	17		(36)		(19)
Balance at March 31, 2022	$	7,091	$	1,476	$	8,567

Intangible Assets of the Company, Other Than Goodwill and Trade Names

Intangible assets of the Company, other than goodwill and trade names, consist of the following:

In millions	March 31, 2022		December 31, 2021
Backlog, net of accumulated amortization of $342 and $309	$	1,096	$	1,114
Customer relationships, net of accumulated amortization of $345 and $331	963		979
Acquired technology, net of accumulated amortization of $360 and $334	952		977
Total	$	3,011	$	3,070

Amortization Expense

Amortization expense for the five succeeding years is estimated to be as follows:

In millions
Remainder of 2022	$	218
2023	$	290
2024	$	280
2025	$	264
2026	$	260