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Debt and Interest Costs - FV, Maturities, etc. (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Long term debt value      
Unamortized debt issuance costs $ 62    
Long term debt maturities      
2024 858,000    
2025 1,050    
2026 819,000    
2027 1,790    
2028 751,000    
Thereafter 3,150    
Letters of credit, outstanding amount 57 $ 59  
Total interest paid and capitalized      
Interest expense 459 330 $ 283
Interest paid during period 378 312 276
Capitalized interest 25 10 17
Noncash financing fees $ 17 16 $ 13
Ownership interest in guarantor subsidiaries (as a percent) 100.00%    
Leverage ratio, maximum 5.0    
Leverage ratio, subsequent period 4.5    
Level 2      
Long term debt value      
Fair value of the long-term debt $ 8,070 7,990  
Carrying value $ 8,360 $ 8,540