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Debt (Non-Recourse Debt Carrying Amounts and Terms) (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Unamortized Discounts [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt |  |  | $ (321) | $ (318) |
Non-recourse Debt, excluding Finance Lease Liabilities |  |  | 16,354 | 16,712 |
Non-recourse Debt Current Maturities | [1] |  | (1,426) | (1,865) |
Non-recourse Debt, excluding Finance Lease Liabilities, Noncurrent | [1] |  | 14,928 | 14,847 |
Derivative, notional amount |  |  | 2,000 |  |
Finance Lease, Liability, Noncurrent |  |  | 77 | 67 |
Finance Lease, Liability, Current |  |  | 4 | 3 |
Gain (Loss) on Extinguishment of Debt |  |  | $ (186) | (169) | $ (188)
AES Panama |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | $ (16) |  |  |
Variable Rate Debt | Bank loans |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 3.93% |  |
Non-Recourse Debt |  |  | $ (3,494) | (3,389) |
Variable Rate Debt | Notes and bonds |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 3.11% |  |
Non-Recourse Debt |  |  | $ (800) | (1,056) |
Variable Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage | [2] |  | 1.67% |  |
Non-Recourse Debt | [2] |  | $ (457) | (460) |
Fixed Rate Debt | Bank loans |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 4.72% |  |
Non-Recourse Debt |  |  | $ (2,965) | (2,900) |
Fixed Rate Debt | Notes and bonds |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 5.20% |  |
Non-Recourse Debt |  |  | $ (8,907) | (8,098) |
Fixed Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage | [2] |  | 3.41% |  |
Non-Recourse Debt | [2] |  | $ (34) | (1,110) |
Fixed Rate Debt | Other |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 4.20% |  |
Non-Recourse Debt |  |  | $ (18) | $ (17) |
[1] | Excludes $4 million and $3 million (current) and $77 million and $67 million (noncurrent) finance lease liabilities included in the respective non-recourse debt line items on the Consolidated Balance Sheet as of December 31, 2020 and 2019, respectively. See Note 14—Leases for further information.
[2] | Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions.

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