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Accounts Receivable (Schedule Of Components Of Accounts Receivable) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Joint interest billings $ 162 $ 158
Other 33 38
Gross accounts receivable 1,776 1,550
Allowance for doubtful accounts (9) (7)
Net accounts receivable 1,767 1,543
Oil, Gas and NGL Sales [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross accounts receivable 1,153 984
Marketing and Midstream Revenues [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross accounts receivable $ 428 $ 370