Redeemable Stock of Subsidiaries (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Temporary Equity [Line Items]
Redeemable Preferred Stock Dividends		$ (62)	$ (64)
Temporary equity carrying amount		1,464	1,321	$ 1,257
Temporary Equity, Stock Issued During Period, Value, New Issues		100	168
Temporary Equity, Net Income		(59)	(87)
Temporary Equity, Interest in Subsidiary Earnings		$ 163	67
Sale of Stock, Consideration Received on Transaction	$ 63
Potengi
Temporary Equity [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		35.50%
Noncontrolling Interest [Member]
Temporary Equity [Line Items]
Temporary Equity, Other Changes		$ 0	(60)
IPALCO Enterprises, Inc. [Member]
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount		773	782
IPL Subsidiary
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount			60
AES Clean Energy
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount		544	436
CDPQ
Temporary Equity [Line Items]
Temporary Equity, Interest in Subsidiary Earnings		77
AES Clean Energy Development
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount		129	86
Temporary Equity, Stock Issued During Period, Value, New Issues			157
Potengi
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount		$ 18	17
Sale of Stock, Description of Transaction		24
Sale of Stock, Consideration Received on Transaction		$ 12
Other Comprehensive Income (Loss) [Member]
Temporary Equity [Line Items]
Temporary Equity, Other Changes		$ 1	$ 40