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Debt and Interest Costs - FV, Maturities, etc. (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Long term debt value      
Unamortized debt issuance costs $ 66    
Long term debt maturities      
2023 1,010    
2024 807    
2025 1,000    
2026 752    
2027 2,140    
Thereafter 2,900    
Letters of credit, outstanding amount 59 $ 62  
Total interest paid and capitalized      
Interest expense 330 283 $ 316
Interest paid during period 312 276 308
Capitalized interest 10 17 9
Noncash financing fees $ 16 13 $ 15
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 $ 7,990 8,030  
Carrying value $ 8,540 $ 7,730