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Total Debt (Tables)
 3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Total Debt Summary
A summary of our debt as of March 31, 2025 and December 31, 2024 is as follows:

March 31, 2025December 31, 2024
Principal AmountCarrying ValueFair ValuePrincipal AmountCarrying ValueFair Value
Senior unsecured notes$27,250 $27,185 $25,101 $27,250 $27,182 $24,881 
Senior secured notes and debentures(a)
56,247 56,521 48,435 56,195 56,475 47,896 
Credit facilities(b)
10,118 10,063 9,916 10,334 10,276 10,079 
$93,615 $93,769 $83,452 $93,779 $93,933 $82,856 

(a)Includes the Company's £625 million fixed-rate British pound sterling denominated notes (the “Sterling Notes”) (remeasured at $807 million and $782 million as of March 31, 2025 and December 31, 2024, respectively, using the exchange rate at the respective dates) and the Company's £650 million aggregate principal amount of Sterling Notes
(remeasured at $840 million and $813 million as of March 31, 2025 and December 31, 2024, respectively, using the exchange rate at the respective dates).
(b)The Company has availability under the Charter Operating credit facilities of approximately $6.4 billion as of March 31, 2025.