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Supplemental Information (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount | $ 1 | $ (6) |
Deferred Compensation Liability, Classified, Noncurrent | $ 80 |  | $ 85
Q1 2024 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Performance Shares | Q1 2024 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares granted (in shares) | 359,133 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value | $ 21 |  |
Stock Issued During Period Percentage Conversion Of Units, Low End | 0.00% |  |
Stock Issued During Period Percentage Conversion Of Units, High End | 200.00% |  |
Performance Shares | Market performance measures achievement | Q1 2024 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares granted (in shares) | 307,816 |  |
Performance Shares | Renewable generation and energy storage installation targets | Q1 2024 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares granted (in shares) | 51,317 |  |
Restricted Stock Units (RSUs) | Q1 2024 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares granted (in shares) | 153,887 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value | $ 11 |  |

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