Asset Impairment Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 473	$ 6
Other Subsidiaries [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	2	6
AES Puerto Rico
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	475	$ 0
Assets Carrying Amount Disclosure Nonrecurring	$ 73