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Summary Of Significant Accounting Policies (Schedule Of Additional Investment Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]      
Oil, gas and NGL sales $ 19,827 $ 13,750 $ 4,673
Accounts receivable 1,767 1,543  
Catalyst [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Oil, gas and NGL sales 405 264  
Production expenses 55 42  
Accounts receivable $ 14 $ 22