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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Derivatives Fair Value [Line Items]    
Gross Fair Value $ (4) $ (569)
Net Fair Value (4) (569)
Short-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value 186 6
Amounts Netted (88) (4)
Net Fair Value $ 98 2
Balance Sheet Classification Other current assets  
Long-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ 63 6
Amounts Netted (2)  
Net Fair Value $ 61 6
Balance Sheet Classification Other long-term assets  
Short-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ (240) (579)
Amounts Netted 88 4
Net Fair Value $ (152) (575)
Balance Sheet Classification Other current liabilities  
Long-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ (5) (2)
Amounts Netted 2  
Net Fair Value $ (3) $ (2)
Balance Sheet Classification Other long-term liabilities