Intangibles (Tables)

3 Months Ended

Mar. 31, 2020

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 for the three months ended March 31, 2020 is as follows:

In millions	Freight Segment		Transit Segment		Total
Balance at December 31, 2019	$	6,876.6	$	1,484.0	$	8,360.6
Additions	(3.7)		—		(3.7)
Foreign currency impact	(62.8)		(20.4)		(83.2)
Balance at March 31, 2020	$	6,810.1	$	1,463.6	$	8,273.7

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, 2020		December 31, 2019
Intellectual property, patents, and other intangibles, net of accumulated amortization of $147.8 and $123.8	$	1,083.5	$	1,108.9
Backlog, net of accumulated amortization of $119.0 and $92.0	1,312.4		1,342.1
Customer relationships, net of accumulated amortization of $222.2 and $212.9	999.9		1,029.9
Total	$	3,395.8	$	3,480.9

Amortization Expense

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

In millions
Remainder of 2020	$	212.5
2021	277.9
2022	277.5
2023	276.9
2024	267.5