v3.23.3
OTHER INTANGIBLE ASSETS
 9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
OTHER INTANGIBLE ASSETS OTHER INTANGIBLE ASSETS
Intangible assets are comprised of the following:
September 30, 2023December 31, 2022
Gross
Carrying
Amount		Accumulated
Amortization		NetGross
Carrying
Amount		Accumulated
Amortization		Net
Customer relationships$1,925 $(791)$1,135 $1,917 $(729)$1,189 
Technology1,240 (870)371 1,212 (803)409 
Trade names and trademarks289 (183)106 287 (175)112 
Capitalized software1,384 (1,094)290 1,308 (1,040)268 
Finite-lived intangible assets4,839 (2,937)1,902 4,725 (2,747)1,978 
Indefinite-lived intangible assets2,202 — 2,202 2,202 — 2,202 
Total intangible assets$7,041 $(2,937)$4,104 $6,927 $(2,747)$4,180 
Intangible assets are generally amortized on a straight-line basis with estimated useful lives ranging from 1 to 35 years. Amortization expense for the three months ended September 30, 2023 and 2022 was $64 million and $54 million, respectively, and $190 million and $164 million for the nine months ended September 30, 2023 and 2022, respectively.
Estimated amortization expense for the remainder of 2023 and each of the subsequent five fiscal years is expected to be as follows:
YearEstimated Amortization Expense
Remainder of 2023$63 
2024237 
2025197 
2026151 
2027126 
2028111