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Share-Based Compensation (Schedule Of Share-Based Compensation Expense Included In The Consolidated Statements Of Comprehensive Earnings) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation expense $ 51 $ 48
Related income tax benefit 18 27
G&A [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation expense 50 48
Exploration Expenses [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation expense $ 1 $ 0