Subsequent Events (Details) - Subsequent Event [Member] - AES Southland [Domain] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Oct. 23, 2020
Subsequent Event [Line Items]
Proceeds from Sale of Other Investments	$ 424
AES Southland [Domain]
Subsequent Event [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		35.00%

Amount of cash inflow from the sale of investments classified as other.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfOtherInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration