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GOODWILL AND INTANGIBLE ASSETS
 3 Months Ended
Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS
The change in the carrying amount of goodwill by segment is as follows:
In millionsFreight SegmentTransit SegmentTotal
Balance at December 31, 2025
$8,567 $1,649 $10,216 
Additions/adjustments6 475 481 
Foreign currency impact(12)(60)(72)
Balance at March 31, 2026
$8,561 $2,064 $10,625 
As of March 31, 2026 and December 31, 2025, the Company’s trade names had a net carrying amount of $906 million and $851 million, respectively. The Company believes these intangibles have indefinite lives.
Intangible assets of the Company, other than goodwill and trade names, consist of the following:
 March 31, 2026December 31, 2025
In millionsGross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Backlog$1,366 $(639)$727 $1,311 $(613)$698 
Customer relationships2,278 (570)1,708 2,000 (550)1,450 
Acquired technology1,669 (771)898 1,570 (731)839 
Total$5,313 $(1,980)$3,333 $4,881 $(1,894)$2,987 
At March 31, 2026, the weighted average remaining useful lives of backlog, customer relationships and acquired technology were 7 years, 17 years and 7 years, respectively. The backlog intangible asset primarily consists of in-place long-term agreements acquired by the Company in conjunction with the acquisition of GE Transportation and Dellner Couplers. Amortization expense for intangible assets was $87 million for the three months ended March 31, 2026, and $73 million for the three months ended March 31, 2025.
Amortization expense for the five succeeding years is estimated to be as follows:
In millions
Remainder of 2026$270 
2027$356 
2028$354 
2029$352 
2030$339