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Debt (Non-Recourse Debt Maturity Schedule) (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Details [Line Items] |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | $ (368,000,000) | $ (394,000,000)
Non Recourse Debt Total | 15,645,000,000 | $ 15,340,000,000
Nonrecourse Debt [Member] |  |
Debt Details [Line Items] |  |
Debt Instrument, Face Amount | 1,351,000,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 1,458,000,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 1,601,000,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 1,530,000,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 1,316,000,000 |
Long-term Debt, Maturities, Repayments of Principal after Year Five | 8,411,000,000 |
Nonrecourse Debt [Member] |  |
Debt Details [Line Items] |  |
Non-Recourse Debt | 1,697,000,000 |
AES Southland [Domain] | Nonrecourse Debt [Member] |  |
Debt Details [Line Items] |  |
Debt Instrument, Face Amount | $ 104,000,000 |

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