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Stock-Based Compensation (Narrative) (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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) | 8.6 |  |
Settled performance share units and restricted stock units | $ 47 | $ 50 | $ 58
Compensation cost not yet recognized | $ 38 |  |
Expected weighted average recognition period for share-based compensation expense, in months | 21 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 | $ 5 | $ 5 | $ 8
Performance Share Units | Market Condition PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
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% |  |
Performance Share Units | Market Condition PSUs | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Extended Award Vesting Period | 37 months |  |
Performance Share Units | Market Condition PSUs | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Extended Award Vesting Period | 38 months |  |
Performance Share Units | Performance Condition PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
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 | Performance Condition PSUs | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Extended Award Vesting Period | 37 months |  |
Performance Share Units | Performance Condition PSUs | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Extended Award Vesting Period | 38 months |  |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award Requisite Service Period | 5 years |  |
Restricted Stock Units | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 37 months |  |
Restricted Stock Units | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 38 months |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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