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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | $ 2,216 | $ 1,783 |
Finite-Lived Intangible Assets, Accumulated Amortization | (434) | (385) |
Finite-Lived Intangible Assets, Net, Total | 1,782 | 1,398 |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 59 | 52 |
Indefinite- lived intangible assets, Amortization | 0 | 0 |
Intangible Assets, Gross | 2,275 | 1,835 |
Intangible Assets, Net | 1,841 | 1,450 | $ 827
Land Use Rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 42 | 28 |
Indefinite- lived intangible assets, Amortization | 0 | 0 |
Transmission Rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 16 | 19 |
Indefinite- lived intangible assets, Amortization | 0 | 0 |
Water rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 0 | 3 |
Indefinite- lived intangible assets, Amortization | 0 | 0 |
Other Indefinite Lived Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 1 | 2 |
Indefinite- lived intangible assets, Amortization | 0 | 0 |
Computer Software, Intangible Asset [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 582 | 457 |
Finite-Lived Intangible Assets, Accumulated Amortization | (307) | (279) |
Finite-Lived Intangible Assets, Net, Total | 275 | 178 |
Emission allowances [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 37 | 18 |
Finite-Lived Intangible Assets, Accumulated Amortization | 0 | 0 |
Finite-Lived Intangible Assets, Net, Total | 37 | 18 |
Project Development Rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 991 | 819 |
Finite-Lived Intangible Assets, Accumulated Amortization | (17) | (8) |
Finite-Lived Intangible Assets, Net, Total | 974 | 811 |
Contracts |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 342 | 183 |
Finite-Lived Intangible Assets, Accumulated Amortization | (40) | (48) |
Finite-Lived Intangible Assets, Net, Total | 302 | 135 |
Other Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 57 | 111 |
Finite-Lived Intangible Assets, Accumulated Amortization | (20) | (17) |
Finite-Lived Intangible Assets, Net, Total | 37 | 94 |
Compensation from Concession Agreement |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 207 | 195 |
Finite-Lived Intangible Assets, Accumulated Amortization | (50) | (33) |
Finite-Lived Intangible Assets, Net, Total | $ 157 | $ 162 |

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