Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosures [Line Items]
Effective Income Tax Rate Reconciliation, Percent	28.00%	31.00%	(60.00%)	34.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Proceeds from Divestiture of Businesses and Interests in Affiliates			$ 41	$ 226
Income Tax Expense (Benefit)	$ (147)	$ 130	55	$ 302
AES Argentina [Member]
Income Tax Disclosures [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation	11		17
Gener Subsidiary [Member]
Income Tax Disclosures [Line Items]
Income Tax Expense (Benefit)	0		21
DPL Subsidiary [Member]
Income Tax Disclosures [Line Items]
Income Tax Expense (Benefit)			25
Guacolda [Member]
Income Tax Disclosures [Line Items]
Income Tax Expense (Benefit)	28		$ 20
AES Mexico [Member]
Income Tax Disclosures [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation	$ 11