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Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory Federal tax rate | (21.00%) | (21.00%) | (21.00%)
State taxes, net of Federal tax benefit | (6.00%) | (6.00%) | 6.00%
Taxes on foreign earnings | (2.00%) | 15.00% | 12.00%
Tax Cuts and Jobs Act, Income Tax Expense (Benefit) | $ (377,000,000) | $ 0 | $ 0
Valuation allowance | 7.00% | 16.00% | (2.00%)
Uncertain tax positions | 16.00% | 0.00% | 0.00%
Change in tax law | (1.00%) | 3.00% | (1.00%)
Income Tax Expense (Benefit) | $ (133,000,000) | $ 216,000,000 | $ 352,000,000
Other—net | (2.00%) | 3.00% | (1.00%)
Effective tax rate | 13.00% | 44.00% | 35.00%
Investment Tax Credit | $ 0 | $ (0.08) | $ 0
Deconsolidation, Gain (Loss), Amount | 2,074,000,000 |  |
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 41,000,000 |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | $ 41,000,000 |  |
Federal | Latest Tax Year |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Operating Loss Carryforwards, Limitations on Use | 1.4 billion |  |
Guacolda Affiliate [Member] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Tax Expense (Benefit) | $ 20,000,000 | $ 19,000,000 |
Brazil subsidiary [Member] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Tax Expense (Benefit) | 93,000,000 |  |
Na Pua Makani Power Partners [Member] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Investment Tax Credit | $ (35,000,000) |  |
AES Southland [Domain] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Uncertain tax positions | 35.00% |  |
Income Tax Expense (Benefit) | $ 75,000,000 |  |
Buffalo Gap [Member] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory Federal tax rate | (3.00%) | 0.00% | 0.00%
Alto Maipo |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Taxes on foreign earnings | (17.00%) | 0.00% | 0.00%
Deconsolidation, Gain (Loss), Amount | $ 775,000,000 |  |
US and Utilities SBU |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Tax Expense (Benefit) | $ 176,000,000 |  |
UNITED STATES |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory Federal tax rate | (21.00%) |  |
Effective tax rate | 35.00% |  |
Non-US [Member] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Tax Expense (Benefit) | $ 27,000,000 | $ 33,000,000 | $ 26,000,000

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