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Share-Based Compensation (Summary of Unvested Restricted Stock Awards, Performance-Based Restricted Stock Awards And Performance Share Units) (Parenthetical) (Details)
shares in Millions
12 Months Ended
Jan. 07, 2021
Dec. 31, 2022
shares
Share Based Compensation Arrangement By Share Based Payment Award Line Items    
Conversion of common stock into right to received per share 0.5165  
Performance Share Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award Line Items    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   100.00%
Performance Share Units [Member] | Maximum [Member]    
Share Based Compensation Arrangement By Share Based Payment Award Line Items    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   200.00%
Maximum common shares that could be awarded based upon total shareholder return   3.7
Performance Share Units [Member] | Minimum [Member]    
Share Based Compensation Arrangement By Share Based Payment Award Line Items    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   0.00%
Devon and WPX Agreement [Member]    
Share Based Compensation Arrangement By Share Based Payment Award Line Items    
Conversion of common stock into right to received per share 0.5165