v3.26.1
Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Investment Assets
The Company's investment assets are carried at fair value on the consolidated balance sheets, within the line items short-term investments and other long-term assets, as summarized in the following table.
June 30, 2026December 31, 2025
(Dollars in Millions)
Level 1Level 2TotalLevel 1Level 2Total
Exchange-traded Funds
$6 $— $6 $5 $— $5 
Time Deposits— 375 375 — — — 
Corporate Bonds— 75 75 — 82 82 
Government Securities— 72 72 — 71 71 
Asset-backed Securities
— 23 23 — 29 29 
Total Investments at Fair Value
$6 $545 $551 $5 $182 $187 
Schedule of Investment Maturities All investment assets other than exchange-traded funds have stated contractual maturity dates as summarized in the following table:
(Dollars in Millions)
June 30,
2026		December 31,
2025
Less than 1 year
$383 $5 
1 - 5 years
89 94 
5 - 10 years
40 42 
Greater than 10 years
33 41 
Total Investments at Fair Value$545 $182 
Schedule of Fair Value and Carrying Value of Long-Term Debt
The fair value and carrying value of the Company's long-term debt is as follows:
(Dollars in Millions)
June 30,
2026		December 31,
2025
Long-term Debt (Including Current Maturities):
Fair Value$17,159 $17,305 
Carrying Value18,864 18,873