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Long-term Debt
6 Months Ended
Jun. 30, 2025
Debt Disclosure [Abstract]  
Long-term Debt Long-term Debt
The carrying amount of our long-term debt in the form of fixed-rate senior unsecured notes (the Notes) was $28.83 billion as of June 30, 2025 and December 31, 2024. The total estimated fair value of our outstanding Notes was $28.21 billion and $27.83 billion as of June 30, 2025 and December 31, 2024, respectively. The fair value was determined based on the quoted prices for the Notes as of each reporting date, and is categorized accordingly as Level 2 in the fair value hierarchy.