Financial Statement Presentation New Accounting Pronouncement Adopted (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) Rate	Dec. 31, 2022 USD ($) agreement Rate	Dec. 31, 2021 USD ($)	Mar. 31, 2023 USD ($) agreement
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and Cash Equivalents, at Carrying Value		$ 1,374		$ 1,441
Restricted Cash and Cash Equivalents, Current		536		456
Debt service reserves and other deposits		177		180
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,562	2,087	$ 1,484	2,077
Accounts Receivable, Allowance for Credit Loss, Current		5		5
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	4	8
Accounts Receivable, Allowance for Credit Loss, Writeoff	(2)	(3)
Financing Receivable, Allowance for Credit Loss, Recovery	0	2
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	(2)	(5)
Accounts and Financing Receivable, Allowance for Credit Loss	63	83	63	85
Loans and Leases Receivable, Allowance		25		26
Allowance for Doubtful Accounts, Premiums and Other Receivables	2			1
Preferred Stock, Value, Issued	838	838		838
Additional Paid in Capital		6,688		$ 6,557
Obligations Number Of Agreements				127
Guarantor Obligations, Maximum Exposure, Undiscounted				$ 2,902
Secured Debt [Member] | Standby Letters of Credit [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Obligations Number Of Agreements | agreement				2
Guarantor Obligations, Maximum Exposure, Undiscounted				$ 123
Accounts Payable and Accrued Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Supplier Finance Program, Obligation, Current		$ 662		$ 645
Obligations Number Of Agreements | agreement		46		33
Accounts Payable and Accrued Liabilities | Supplier Finance Program [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Supplier Finance Program, Obligation, Current	473	$ 296
Accounts Payable and Accrued Liabilities | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Supplier Finance Program, Obligation, Current		1
Accounts Payable and Accrued Liabilities | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Supplier Finance Program, Obligation, Current	$ 69	$ 88
Accounts Payable and Accrued Liabilities | Weighted Average [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt, Weighted Average Interest Rate | Rate	6.58%	4.32%
Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 3	$ 3	3	$ 3
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2	2	2
Accounts Receivable, Allowance for Credit Loss, Writeoff	(2)	(3)	(2)
Financing Receivable, Allowance for Credit Loss, Recovery	0	1	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	0	0	0
Mong Duong Subsidiary [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	30	28	30	29
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, Recovery		1	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation		0	0
Mong Duong Subsidiary [Member] | Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current			30
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Accounts Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	0
AES Argentina [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	23	30	23	25
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		0	2
Accounts Receivable, Allowance for Credit Loss, Writeoff		0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation		(5)	(2)
AES Argentina [Member] | Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current			23
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2
Accounts Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	(2)
AES Southland [Domain] | Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current		20		20
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		0
Accounts Receivable, Allowance for Credit Loss, Writeoff		0
Financing Receivable, Allowance for Credit Loss, Recovery		0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation		0
Other Entity [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	7	2	7	$ 8
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		6	0
Accounts Receivable, Allowance for Credit Loss, Writeoff		0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation		$ 0	0
Other Subsidiaries [Member] | Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current			$ 7
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Accounts Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation	$ 0