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Stock Compensation (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for future grants (in shares) | 13,500 |  |
Total compensation expense for option grants, Restricted Stock Awards and PSU's | $ 112 | $ 147 | $ 161
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
The weighted-average remaining contractual term of options outstanding | 2 years |  |
The weighted-average remaining contractual term of options exercisable | 2 years |  |
The aggregate intrinsic value of options outstanding (in dollars) | $ 59 |  |
The aggregate intrinsic value of options exercisable (in dollars) | 59 |  |
The total intrinsic values of options exercised (in dollars) | 20 | 117 | 37
Cash proceeds received from options exercised (in dollars) | $ 20 | $ 90 | $ 64
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |  |
Restricted Stock Awards And PSUs [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common shares or units granted as Restricted Stock Awards and PSUs (in shares) | 1,663 | 2,300 | 2,700
Total unrecognized compensation expense | $ 91 |  |
Period during which unrecognized compensation expense is expected to be recognized | 3 years |  |
Amount to be recognized as compensation expense year 1 | $ 58 |  |
Amount to be recognized as compensation expense year 2 | 30 |  |
Amount to be recognized as compensation expense year 3 | $ 3 |  |
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Granted (in dollars per share) | $ 78.90 | $ 70.13 | $ 53.28
Restricted Stock Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Total fair value of Restricted Stock Awards vested during the period | $ 153 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.33% |  |
Performance Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Minimum [Member] | Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Maximum [Member] | Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 5 years |  |

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