Risks and Uncertainties (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Unusual Risk or Uncertainty [Line Items]
Goodwill	$ 1,146	$ 1,061
Debt Default Amount	276
Investments in and advances to affiliates	785	$ 835
AES llumina [Member] | Covenant Violation [Member]
Unusual Risk or Uncertainty [Line Items]
Debt Default Amount	31
Mountain View Power Partners | Long Lived Assets Held And Used [Member]
Unusual Risk or Uncertainty [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	$ 75