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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Derivatives Fair Value [Line Items]    
Gross Fair Value $ 128 $ (569)
Net Fair Value 128 (569)
Short-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value 138 6
Amounts Netted (19) (4)
Net Fair Value $ 119 2
Balance Sheet Classification Other current assets  
Long-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ 12 6
Net Fair Value $ 12 6
Balance Sheet Classification Other long-term assets  
Short-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ (22) (579)
Amounts Netted 19 4
Net Fair Value $ (3) (575)
Balance Sheet Classification Other current liabilities  
Long-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value   (2)
Net Fair Value   $ (2)
Balance Sheet Classification Other long-term liabilities