Other Income and Expense - Other Income (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Schedule of Other Nonoperating Income [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	$ 176	$ 36		$ 212	[1]	$ 0
Gain (Loss) on Disposition of Other Assets				(20)		40
Other Nonoperating Income	183		$ 9	226		54
Other Income [Member]
Schedule of Other Nonoperating Income [Line Items]
Gain (Loss) on Disposition of Other Assets	1		0	1		43	[2]
Other income	6		9	13		11
Other Nonoperating Income	$ 183		$ 9	$ 226		$ 54

[1] 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 18—Acquisitions for further information.

[2] Primarily associated with the gain on sale of Redondo Beach land at Southland. See Note 17—Held-for-Sale and Dispositions for further information.