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Summary Of Significant Accounting Policies (Schedule Of Additional Investment Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]      
Oil, gas and NGL sales $ 15,919 $ 15,140 $ 19,827
Accounts receivable 1,972 1,573  
Catalyst [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Oil, gas and NGL sales 284 213 405
Production expenses 131 93 55
Accounts receivable $ 18 $ 11 $ 14