Risks and Uncertainties (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Unusual Risk or Uncertainty [Line Items]
Debt Default Amount	$ 357
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	1,277	$ 1,197
PUERTO RICO | Covenant Violation [Member]
Unusual Risk or Uncertainty [Line Items]
Debt Default Amount	322
AES llumina [Member] | Covenant Violation [Member]
Unusual Risk or Uncertainty [Line Items]
Debt Default Amount	$ 35