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INTANGIBLES (Tables)
12 Months Ended
Dec. 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 year ended December 31, 2020 is as follows:
FreightTransit
In millionsSegmentSegmentTotal
Balance at December 31, 2019$6,876.6 $1,484.0 $8,360.6 
Additions2.1 — 2.1 
Disposals(5.6)— (5.6)
Foreign currency impact(0.9)129.0 128.1 
Balance at December 31, 2020$6,872.2 $1,613.0 $8,485.2 
Intangible Assets of the Company, Other Than Goodwill and Trademarks
Intangible assets of the Company, other than goodwill and trade names, consist of the following:
 December 31,
In millions20202019
Intellectual property, patents, and other intangibles, net of accumulated amortization of $222.8 and $123.8
$1,007.6 $1,108.9 
Backlog, net of accumulated amortization of $205.9 and $92.0
1,224.7 1,342.1 
Customer relationships, net of accumulated amortization of $276.3 and $212.9
986.2 1,029.9 
Total$3,218.5 $3,480.9 
Estimated Amortization Expense Five Succeeding Years
Estimated amortization expense for the five succeeding years is as follows (in millions):
2021$278.1 
2022277.6 
2023277.2 
2024267.6 
2025265.0