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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | $ 1,783 | $ 1,070
Accumulated Amortization |  | (385) | (330)
Net Balance |  | 1,398 | 740
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 52 | 87
Indefinite- lived intangible assets, Amortization |  | 0 | 0
Intangible Assets, Gross |  | 1,835 | 1,157
Intangible Assets, Net |  | 1,450 | 827
Land Use Rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 28 | 39
Indefinite- lived intangible assets, Amortization |  | 0 | 0
Water rights |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 3 | 20
Indefinite- lived intangible assets, Amortization |  | 0 | 0
Transmission Rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 19 | 22
Indefinite- lived intangible assets, Amortization |  | 0 | 0
Other |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 2 | 6
Indefinite- lived intangible assets, Amortization |  | 0 | 0
Computer Software, Intangible Asset [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | 457 | 386
Accumulated Amortization |  | (279) | (255)
Net Balance |  | 178 | 131
Emission allowances [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | 18 | 64
Accumulated Amortization |  | 0 | 0
Net Balance |  | 18 | 64
Project Development Rights [Member] |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | 819 | 203
Accumulated Amortization |  | (8) | (5)
Net Balance |  | 811 | 198
Contracts |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | 183 | 157
Accumulated Amortization |  | (48) | (38)
Net Balance |  | 135 | 119
Other |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | 111 | 59
Accumulated Amortization |  | (17) | (14)
Net Balance | [1] | 94 | 45
Compensation from Concession Agreement |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |
Gross Balance |  | 195 | 201
Accumulated Amortization |  | (33) | (18)
Net Balance |  | $ 162 | $ 183
[1] | Acquired or purchased emissions allowances are finite-lived intangible assets that are expensed when utilized and included in net income for the year. (3)Includes management rights, renewable energy credits and incentives, and other individually insignificant intangible assets.

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