v3.26.1
Intangible Assets
 6 Months Ended
Jun. 30, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Intangible Assets Intangible Assets
Intangible assets consist of the following:
June 30, 2026December 31, 2025
(Dollars in millions)Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Acquired intangible assets$1,087 $(995)$92 $1,087 $(984)$103 
Patents and licenses18 (10)8 18 (9)9 
Total intangible assets
$1,105 $(1,005)$100 $1,105 $(993)$112 
Amortization expense related to acquired intangible assets was $6 million for the three months ended June 30, 2026 and 2025, and $11 million for the six months ended June 30, 2026 and 2025.