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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Derivatives Fair Value [Line Items]    
Gross Fair Value $ 66 $ 128
Amounts Netted
Net Fair Value 66 128
Short-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value 111 138
Amounts Netted (20) 19
Net Fair Value $ 91 119
Balance Sheet Classification Other current assets  
Long-term Derivative Asset [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ 11 12
Amounts Netted (1)
Net Fair Value $ 10 12
Balance Sheet Classification Other long-term assets  
Short-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ (43) (22)
Amounts Netted 20 (19)
Net Fair Value $ (23) (3)
Balance Sheet Classification Other current liabilities  
Long-term Derivative Liability [Member]    
Derivatives Fair Value [Line Items]    
Gross Fair Value $ (13)
Amounts Netted 1
Net Fair Value $ (12)
Balance Sheet Classification Other long-term liabilities