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Stock Transactions And Stock-Based Compensation (Components Of Share-Based Compensation Program) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Pretax compensation expense | $ 218 | $ 187 | $ 159
Income tax benefit | (44) | (39) | (33)
Total stock-based compensation expense, net of income taxes | 174 | 148 | 126
RSUs/PSUs |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Pretax compensation expense | 129 | 114 | 97
Income tax benefit | (26) | (24) | (20)
Total stock-based compensation expense, net of income taxes | 103 | 90 | 77
Stock options |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Pretax compensation expense | 89 | 73 | 62
Income tax benefit | (18) | (15) | (13)
Total stock-based compensation expense, net of income taxes | $ 71 | $ 58 | $ 49

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