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Debt (Tables)
9 Months Ended
Sep. 30, 2025
Debt  
Schedule of debt

    

Outstanding

    

    

    

    

 

principal

Carrying value

 

September 30,

September 30,

December 31,

 

        

2025

    

2025

        

2024

 

 

amounts in millions

Margin Loan Facility

$

840

 

840

 

790

3.125% Exchangeable Senior Debentures due 2053

965

952

951

3.125% Exchangeable Senior Debentures due 2054

946

Total debt

$

1,805

 

1,792

 

2,687

Debt classified as current

 

 

(102)

 

Total long-term debt

$

1,690

 

2,687