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Share-Based Payments (Summary Of Compensation Costs Recognized In The Consolidated Statements of Operations) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Tax benefits related to compensation cost | $ (18) | $ (16) | $ (15)
Allocated Share-based Compensation Expense, Net of Tax | 55 | 45 | 45
Restricted Stock Awards [Member] |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated Share-Based Compensation Expense | $ 73 | $ 61 | $ 60

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