Other Income and Expense (Nonoperating Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	$ 178	$ 36	$ 214
Other Income [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain				$ 254	[1]	$ 0		$ 0
Litigation Settlement, Amount Awarded from Other Party				53	[2]	0		0
Asset Acquisition of a VIE, Contingent Consideration, Remeasurement Gain				28	[3]	0		0
Gain (Loss) on Disposition of Other Assets				24		46	[4]	0
Gain on pension curtailment				11		0		0
Non-service pension income				10		0		0
Public Utilities, Allowance for Funds Used During Construction, Additions				8		5		3
Insured Event, Gain (Loss)				0		0		118	[5]
Other				22		24		24
Other income				$ 410		$ 75		$ 145

[1] Primarily related to the remeasurement of our existing equity interest in sPower’s development platform as part of the step acquisition to form AES Clean Energy Development. See Note 25—Acquisitions for further information.

[2] Primarily related to settlement of legal arbitration at Alto Maipo.

[3] Primarily related to the remeasurement of contingent consideration on the Great Cove Solar acquisition at Clean Energy See Note 25—Acquisitions for further information.

[4] For the year ended December 31, 2020, primarily associated with the gain on sale of Redondo Beach land at Southland. See Note 24—Held-for-Sale and Dispositions for further information.

[5] Associated with recoveries for property damage at the Andres facility in the Dominican Republic from a lightning incident in September 2018 and the upgrade of the tunnel lining at Changuinola.