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Long-Term Debt (Schedule Of Long-Term Debt Maturity) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Long-Term Debt [Abstract]    
2022 $ 882  
2024 500  
2025 974  
2026 38  
Thereafter 7,733  
Unamortized discount and debt issuance costs (95) $ (98)
Total $ 10,032