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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
3 Months Ended
Mar. 31, 2023
shares
Performance Share Units [Member] | Maximum [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Maximum common shares that could be awarded based upon total shareholder return 3.1