Financial Statement Presentation New Accounting Pronouncement Adopted (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 1,056			$ 943
Restricted Cash and Cash Equivalents, Current	334			304
Debt service reserves and other deposits	172			237
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,562	$ 2,606		1,484	$ 1,827
Accounts Receivable, Allowance for Credit Loss, Current	5			5
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	4	1
Accounts Receivable, Allowance for Credit Loss, Writeoff	(2)	(3)
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	(2)	(1)
Accounts and Financing Receivable, Allowance for Credit Loss	63	59		63	62
Allowance for Doubtful Accounts, Premiums and Other Receivables	2	5
Preferred Stock, Value, Issued	838	838		838
Additional Paid in Capital	6,903			7,106
Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Preferred Stock, Value, Issued			$ 13
Additional Paid in Capital			$ 13
Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	3	6		3	9
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2	0
Accounts Receivable, Allowance for Credit Loss, Writeoff	(2)	(3)
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	0	0
Mong Duong Subsidiary [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	30	32		30	32
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0	0
Accounts Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	0	0
AES Argentina [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	23	20		23	20
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2	1
Accounts Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	(2)	(1)
Other Entity [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	7	1		$ 7	$ 1
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0	0
Accounts Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	$ 0	$ 0