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Intangible Assets, Net
12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
6 – Intangible Assets, Net

The components of intangible assets, net were as follows:
December 31, 2023
GrossNet
CarryingAccumulatedIntangible
(Dollars in millions)AmountAmortizationAssets
Developed and Acquired Technology$614 $(479)$135 
Trade Names395 (160)235 
Intangible Assets, Net$1,009 $(639)$370 
December 31, 2022
GrossNet
CarryingAccumulatedIntangible
(Dollars in millions)AmountAmortizationAssets
Developed and Acquired Technology$591 $(359)$232 
Trade Names395 (121)274 
Intangible Assets, Net$986 $(480)$506 
Amortization expense was $156 million, $155 million and $156 million in 2023, 2022, and 2021, respectively. Based on the carrying value of intangible assets at December 31, 2023, amortization expense for the subsequent five years is estimated as follows (dollars in millions): 
PeriodAmount
2024
$150 
2025
45 
2026
45 
2027
44 
202843