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Acquisitions (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Jun. 30, 2021
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain |  |  |  | $ 36 |
Equity Method Investment, Ownership Percentage | 10.00% |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  | $ 81 |  | $ 45
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination |  |  | 7 |  |
Other Income [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain | $ 0 | [1] | $ 36 |  |
AIMco |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  | 25.00% |  |
sPower [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Consideration Transferred |  |  | $ 77 |  |
Great Cove Solar I |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Asset Acquisition, Purchase Price |  |  | 13 |  |
Asset Acquisition, Contingent Consideration, Liability |  |  | $ 6 |  |
Series of Individually Immaterial Business Acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 75.00% |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage |  |  | 25.00% |  |
[1] | Related to the remeasurement of our existing equity interest in sPower’s development platform as part of the step acquisition to form AES Clean Energy Development. See Note 17—Acquisitions for further information.

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