Debt (Non-recourse Debt Narrative) (Details) $ in Millions	3 Months Ended		12 Months Ended			24 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) agreement	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 63	$ 15	$ 78
Restricted cash and debt service reserves			341	424		$ 341
Restricted net assets			901			901
Proceeds From Issuance Of Nonrecourse Debt			4,521	5,788	$ 1,644
Restricted Cash Held for Insurance			90	56		90
Materiality Threshold for Sub Default to Trigger Cross Default			$ 200			$ 200
Materiality threshold for cash distribution from business to Parent			20.00%			20.00%
Number Of Credit Agreements | agreement					2
Restricted Cash
Debt Instrument [Line Items]
Restricted cash and debt service reserves			$ 158	285		$ 158
Debt Service Reserves
Debt Instrument [Line Items]
Restricted cash and debt service reserves			183	139		183
AES Renewable Holdings
Debt Instrument [Line Items]
Loss on extinguishment of debt				$ 12
AES Clean Energy Development | Bridge Loan due Dec 2023 | Bridge Loan
Debt Instrument [Line Items]
Debt face amount			500			500
Debt face amount			500			$ 500
Nonrecourse Debt | DPL Subsidiary
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			300
Nonrecourse Debt | AES Clean Energy
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			2,654
Nonrecourse Debt | AES Andes
Debt Instrument [Line Items]
Loss on extinguishment of debt			(47)
Nonrecourse Debt | IPL Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			300
Nonrecourse Debt | Mercury Chile Hold Co LLC | Bridge Loan
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt		$ 350
Nonrecourse Debt | AES Hispanola Holdings BV
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			350
DPL First Mortgage Bonds Total | Nonrecourse Debt | DPL Subsidiary
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			$ 200
DPL First Mortgage Bonds due 2028 | Nonrecourse Debt | DPL Subsidiary
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.49%			5.49%
Proceeds From Issuance Of Nonrecourse Debt			$ 92
DPL First Mortgage Bonds due 2033 | Nonrecourse Debt | DPL Subsidiary
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.70%			5.70%
Proceeds From Issuance Of Nonrecourse Debt			$ 108
Master Indenture Notes | Senior Notes [Member] | AES Clean Energy Development
Debt Instrument [Line Items]
Debt face amount			252			$ 252
Subordinated Liabilities, Period Increase (Decrease)			215
Debt face amount			252			252
Master Indenture Notes | Senior Notes [Member] | AES Clean Energy and sPower (Co-Issuers)
Debt Instrument [Line Items]
Debt face amount			884			884
Debt face amount			884			$ 884
350 Million Credit Agreement Due 2028 | Nonrecourse Debt | AES Hispanola Holdings BV
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ (1)
350 Million Credit Agreement Due 2028 | Nonrecourse Debt | AES Hispanola Holdings BV | BID
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.85%
Proceeds From Issuance Of Nonrecourse Debt	$ 300
Debt face amount	350
Debt face amount	350
350 Million Credit Agreement Due 2028 | Nonrecourse Debt | Colon | BID
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt	$ 50
6.37% Senior Notes Due 2047 | Senior Notes [Member] | AES Clean Energy and sPower (Co-Issuers)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.37%			6.37%
Debt face amount			$ 246			$ 246
Debt face amount			246			246
IPL Term Loan due 2024 | IPL Subsidiary [Member] | Nonrecourse Debt
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			300
Bellefield Financing Agreement due 2026 | Nonrecourse Debt | AES Clean Energy Development
Debt Instrument [Line Items]
Credit Facility, Commitments Used			998			998
Credit facility, commitments			2,400			2,400
Rexford Bridge Loan due 2024 | AES Renewable Holdings | Nonrecourse Debt
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt			300
Revolving Credit Facilities, Initial Commitments | AES Clean Energy
Debt Instrument [Line Items]
Credit Facility, Commitments Used			2,300			2,300
Line of Credit Facility, Increase (Decrease), Net			1,000
Revolving Credit Facilities, Initial Commitments | AES Clean Energy and sPower (Co-Borrowers)
Debt Instrument [Line Items]
Debt face amount			3,800		$ 1,200	3,800
Credit Facility, Commitments Used			2,800			2,800
Line of Credit Facility, Increase (Decrease), Net						2,600
Debt face amount			$ 3,800		$ 1,200	$ 3,800