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Stock-Based Compensation (Narrative) (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares authorized (in shares) | 8.8 |  |
Maximum shares available for grants (in shares) | 7.7 |  |
Settled performance share units and restricted stock units | $ 24 | $ 60 | $ 47
Compensation cost not yet recognized | $ 39 |  |
Expected weighted average recognition period for share-based compensation expense, in months | 23 months |  |
Income taxes |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options | $ (1) | $ 6 | $ 5
Performance Share Units | Market Condition PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares issued per share unit, minimum | 0.00% |  |
Percentage of shares issued per share unit, maximum | 200.00% |  |
Performance Share Units | Performance Condition PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Extended Award Vesting Period | 38 months |  |
Award Requisite Service Period | 5 years |  |
Percentage of shares issued per share unit, minimum | 0.00% |  |
Percentage of shares issued per share unit, maximum | 200.00% |  |
Performance Share Units | Market Condition PSUs February Grant |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Extended Award Vesting Period | 38 months |  |
Award Requisite Service Period | 5 years |  |
Percentage of shares issued per share unit, minimum | 0.00% |  |
Percentage of shares issued per share unit, maximum | 200.00% |  |
Stock Issued During Period Percentage Conversion Of Units, Mid-point | 100.00% |  |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 38 months |  |
Award Requisite Service Period | 5 years |  |

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