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Risks and Uncertainties (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2017 | Dec. 31, 2016
Unusual Risk or Uncertainty [Line Items] |  |  |
EP Preferred shares with preference to exercise withdrawal rights | 3 | 3 |
Debt Default Amount | $ 1,024 | $ 1,024 |
Assets Carrying Amount Disclosure Nonrecurring | 622 | 622 |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures | 1,164 | 1,164 | $ 621
Accounts Receivable, Net | 63 | 63 |
Accounts Receivable, Past Due | $ 30 | $ 30 |
EP Preferred shares percentage with preference to exercise withdrawal rights | 2.70% | 2.70% |
PUERTO RICO | Covenant Violation [Member] |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |
Debt Default Amount | $ 365 | $ 365 |
Alto Maipo [Member] | Covenant Violation [Member] |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |
Debt Default Amount | 623 | 623 |
AES llumina [Member] | Covenant Violation [Member] |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |
Debt Default Amount | 36 | $ 36 |
AES llumina [Member] |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |
Loss from Catastrophes | $ 6 |  |
Gener Subsidiary [Member] |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |
Investment In Affiliate Ownership Percentage | 67.00% | 67.00% |
Alto Maipo [Member] |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |
Increase (Decrease) in Projected Costs | 22.00% | 22.00% |
Investment In Affiliate Ownership Percentage | 62.00% | 62.00% |
Derivative Liabililty, Amount in Technical Default | $ 139 | $ 139 |
Assets Carrying Amount Disclosure Nonrecurring | 1,400 | 1,400 |
Deferred Tax Assets, Net | 60 | 60 |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures | 360 | 360 |
Other Commitment | $ 55 | 55 |
Project Budgeted Cost |  | $ 2,000 |

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