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Debt (Non-Recourse Debt Carrying Amounts and Terms) (Details) - USD ($) | Dec. 31, 2017 | Jun. 30, 2017 | Feb. 28, 2017 | Dec. 31, 2016
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Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  | $ (394,000,000) |  |  | $ (425,000,000)
Non-Recourse Debt |  | 15,340,000,000 |  |  | 14,783,000,000
Non-recourse Debt Current Maturities |  | (2,164,000,000) |  |  | (1,052,000,000)
Non-recourse debt - noncurrent, balance at variable interest entities |  | 13,176,000,000 |  |  | 13,731,000,000
Derivative, notional amount |  | $ 3,600,000,000 |  |  |
Interest rate swap, fixed minimum interest rate |  | 2.49% |  |  |
Interest rate swap, fixed maximum interest rate |  | 8.00% |  |  |
Variable Rate Debt | Bank loans |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate |  | 4.52% |  |  |
Variable Rate Debt | Notes and bonds |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate |  | 8.06% |  |  |
Variable Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate | [1] | 3.28% |  |  |
Fixed Rate Debt | Bank loans |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate |  | 4.54% |  |  |
Fixed Rate Debt | Notes and bonds |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate |  | 5.68% |  |  |
Fixed Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate | [1] | 5.35% |  |  |
Fixed Rate Debt | Other |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted Average Interest Rate |  | 5.81% |  |  |
Nonrecourse Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 3,508,000,000 |  |  |
Other | Fixed Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt |  | 26,000,000 |  |  | 30,000,000
Debt to (or guaranteed by) multilateral, export credit agencies or development banks | Variable Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt | [1] | 3,668,000,000 |  |  | 3,189,000,000
Debt to (or guaranteed by) multilateral, export credit agencies or development banks | Fixed Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt | [1] | 271,000,000 |  |  | 328,000,000
Notes and bonds | Variable Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt |  | 900,000,000 |  |  | 471,000,000
Notes and bonds | Fixed Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt |  | 7,388,000,000 |  |  | 7,822,000,000
Bank loans | Variable Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt |  | 2,488,000,000 |  |  | 2,601,000,000
Bank loans | Fixed Rate Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Non-Recourse Debt |  | 993,000,000 |  |  | $ 767,000,000
AES Argentina [Member] | Nonrecourse Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | 310,000,000 |  | $ 75,000,000 |
AES Argentina [Member] | Unsecured Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 300,000,000 |
AES Southland [Domain] | Nonrecourse Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 557,000,000 | $ 1,967,000,000 |  |
Weighted Average Interest Rate |  |  | 4.50% |  |
AES Southland [Domain] | Senior Secured Note through 2040 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 1,500,000,000 |  |
AES Southland [Domain] | Senior Secured Term Loan through 2027 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 492,000,000 |  |
[1] | (2)Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions.

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