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Subsequent Events (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Feb. 01, 2022 | Dec. 31, 2020
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock (without par value, 50,000,000 shares authorized; 1,043,050 issued and outstanding at December 31, 2021) |  | $ 825 |  |  | $ 0
Subsequent Event [Member] | Coal [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Reduction of Asset |  |  |  | 10.00% |
AES Gener |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction |  |  | 38.00% |  |
Sale of Stock, Description of Transaction |  |  | 5 |  |
Andes Chile Subsidiary |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Sale of Stock, Percentage of Ownership before Transaction |  | 67.00% |  |  |
Andes Chile Subsidiary | Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction | 99.00% |  |  |  |
AES Brasil |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Sale of Stock, Percentage of Ownership before Transaction |  | 37.40% |  |  |
AES Brasil | Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction | 35.80% |  |  |  |
Sale of Stock, Description of Transaction | 3.5 |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock | $ 63 |  |  |  |

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- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 + Details
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