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Intangible Assets and Goodwill
 3 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill Intangible assets and goodwill
 
A.  Intangible assets
 
Intangible assets were comprised of the following:
 
  March 31, 2023
(Millions of dollars)Weighted
Amortizable
Life (Years)		Gross
Carrying
Amount		Accumulated
Amortization		Net
Customer relationships16$2,241 $(1,717)$524 
Intellectual property131,470 (1,345)125 
Other17121 (76)45 
Total finite-lived intangible assets15$3,832 $(3,138)$694 

  December 31, 2022
Weighted
Amortizable
Life (Years)		Gross
Carrying
Amount		Accumulated
Amortization		Net
Customer relationships16$2,233 $(1,675)$558 
Intellectual property121,473 (1,320)153 
Other16132 (85)47 
Total finite-lived intangible assets14$3,838 $(3,080)$758 

Amortization expense for the three months ended March 31, 2023 and 2022 was $66 million and $72 million, respectively. Amortization expense related to intangible assets is expected to be:

(Millions of dollars)
Remaining Nine Months of 20232024202520262027Thereafter
$151$171$161$91$27$93
 
B.  Goodwill
 
No goodwill was impaired during the three months ended March 31, 2023 or 2022.
The changes in carrying amount of goodwill by reportable segment for the three months ended March 31, 2023 were as follows: 

(Millions of dollars)December 31,
2022
Other Adjustments 1
March 31,
2023
Construction Industries
Goodwill$287 $(3)$284 
Impairments(22)— (22)
Net goodwill265 (3)262 
Resource Industries
Goodwill4,130 18 4,148 
Impairments(1,175)— (1,175)
Net goodwill2,955 18 2,973 
Energy & Transportation
Goodwill2,947 6 2,953 
Impairments(925)— (925)
Net goodwill2,022 6 2,028 
All Other 2
Goodwill46 — 46 
Impairments— — — 
Net goodwill46 — 46 
Consolidated total
Goodwill7,410 21 7,431 
Impairments(2,122)— (2,122)
Net goodwill$5,288 $21 $5,309 


1 Other adjustments are comprised primarily of foreign currency translation.
2 Includes All Other operating segment (See Note 16).