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Asset Impairment Expense (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Apr. 12, 2019
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | $ 1,575 | $ 864 |  | $ 185 |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 1,575 | 864 |  | 185 |
Long-Lived Assets |  | $ 20,183 |  |  |  |  |  |  | 20,183 | 23,103 |  |  |
Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | 2,225 |  |  |  |  |  |  | 2,225 |  |  |  |
Hawaii Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  | $ 38 | $ 60 |  | 0 | 38 |  | 60 |
Kilroot and Ballylumford [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  | $ 115 | 0 | 0 |  | 115 |
Assets carrying amount |  |  |  |  |  |  |  | $ 114 |  |  |  |  |
Angamos [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  | $ 155 |  |  | 564 |  |  | 155 | 564 |  | 0 |
AES Gener |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  | 213 |  |  | 0 | 213 |  | 0 |
Buffalo Gap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  | 29 |  |  |  |  |  |  | 29 | 0 |  | 0 |
buffalo gap II [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  | 73 |  |  |  |  |  |  | 73 | 0 |  | 0 |
buffalo gap III |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  | 91 |  |  |  |  |  |  | 91 | 0 |  | 0 |
Ventanas 3 & 4 |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  | 649 |  |  |  |  |  | 649 | 0 |  | 0 |
Mountain View Power Partners |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  | $ 67 |  |  |  |  | 67 | 0 |  | 0 |
AES PR |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  | $ 475 |  |  |  | 475 | 0 |  | 0 |
Assets carrying amount |  |  |  |  | $ 73 |  |  |  |  |  |  |  |
AES Panama |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  | 11 |  |  | 30 |  |  | 11 | 30 |  | 0 |
Long Lived Assets Held For Sale [Member] | AES Panama |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 11 |  |  |  |
Assets carrying amount |  |  | 17 |  |  |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Member] | AES Panama | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  | 0 |  |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | Hawaii Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  |  |  |  | $ 103 |  |  |  |  | $ 103 |
Long Lived Assets Held And Used [Member] | Hawaii Subsidiary [Member] | Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  | 12 |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | Kilroot and Ballylumford [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 232
Long Lived Assets Held And Used [Member] | Angamos [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 155 | 564 | [1] |  |
Long Lived Assets Held And Used [Member] | Angamos [Member] | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  | 241 |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | Angamos [Member] | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  | 86 | 86 |  | $ 306 |  |  |  | 306 | [1] |  |
Long Lived Assets Held And Used [Member] | Buffalo Gap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 29 |  |  |  |
Long Lived Assets Held And Used [Member] | Buffalo Gap [Member] | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | 29 |  |  |  |  |  |  | 29 |  |  |  |
Long Lived Assets Held And Used [Member] | Buffalo Gap [Member] | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | 0 |  | 0 |  |  |  |  | 0 |  |  |  |
Long Lived Assets Held And Used [Member] | buffalo gap II [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 73 |  |  |  |
Long Lived Assets Held And Used [Member] | buffalo gap II [Member] [Member] | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | 73 |  |  |  |  |  |  | 73 |  |  |  |
Long Lived Assets Held And Used [Member] | buffalo gap II [Member] [Member] | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | 0 |  | 0 |  |  |  |  | 0 |  |  |  |
Long Lived Assets Held And Used [Member] | buffalo gap III |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 91 |  |  |  |
Long Lived Assets Held And Used [Member] | buffalo gap III | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | 91 |  |  |  |  |  |  | 91 |  |  |  |
Long Lived Assets Held And Used [Member] | buffalo gap III | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  | $ 0 |  | 0 |  |  |  |  | 0 |  |  |  |
Long Lived Assets Held And Used [Member] | Ventanas 3 & 4 |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 649 |  |  |  |
Long Lived Assets Held And Used [Member] | Ventanas 3 & 4 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  | 661 |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | Ventanas 3 & 4 | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  | $ 12 | 12 |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | Mountain View Power Partners |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  | 67 |  |  |  |
Long Lived Assets Held And Used [Member] | Mountain View Power Partners | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  | 78 |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | Mountain View Power Partners | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  | $ 11 |  |  |  |  |  |  |  |  |
Long Lived Assets Held And Used [Member] | AES PR |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges | [1] |  |  |  |  |  |  |  | $ 475 |  |  |  |
Long Lived Assets Held And Used [Member] | AES Panama |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  |  |  |  |  |  |  | 30 |  |  |
Long Lived Assets Held And Used [Member] | AES Panama | Level 3 | Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Expense [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Assets carrying amount |  |  |  |  |  |  |  |  |  | $ 14 |  |  |
[1] | See Note 22—Asset Impairment Expense for further information.(5)See Note 8—Investments In and Advances to Affiliates for further information.

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