Other Income and Expense - Other Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021		Mar. 31, 2020
Schedule of other expense [Line Items]
Sales-type and Direct Financing Leases, Profit (Loss)	$ 13	[1]	$ 0
Other Nonoperating Expense	0		44
Other Expenses	16		4
Other Expense [Member]
Schedule of other expense [Line Items]
Gain (Loss) on Disposition of Assets	3		1
Other Nonoperating Expense	0		3
Other Expenses	$ 16		$ 4

[1] Related to a loss recognized at commencement of a sales-type lease at AES Distributed Energy. See Note 9—Leases for further information.