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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Derivatives Fair Value [Line Items]    
Gross Fair Value $ 0 $ 199
Amounts Netted 0 0
Net Fair Value 0 199
Short-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value 44 213
Amounts Netted (15) (5)
Net Fair Value 29 208
Long-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value 5 0
Amounts Netted (3) 0
Net Fair Value 2 0
Short-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value (39) (7)
Amounts Netted 15 5
Net Fair Value (24) (2)
Long-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value (10) (7)
Amounts Netted 3 0
Net Fair Value $ (7) $ (7)