Fair Value (Schedule Of Face And Fair Value Of Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Unamortized discounts	$ 6,768
Face Value	3,488,800	$ 3,033,800
Fair Value	3,315,467	2,775,644
Indianapolis Power And Light Company
Debt Instrument [Line Items]
Unamortized discounts	6,449	6,651
Face Value	2,608,800	2,153,800
Fair Value	2,475,997	1,959,233
Fixed Rate [Member]
Debt Instrument [Line Items]
Face Value	3,033,800	3,033,800
Fair Value	2,860,467	2,775,644
Fixed Rate [Member] | Indianapolis Power And Light Company
Debt Instrument [Line Items]
Face Value	2,153,800	2,153,800
Fair Value	2,020,997	1,959,233
Variable Rate [Member]
Debt Instrument [Line Items]
Face Value	455,000	0
Fair Value	455,000	0
Variable Rate [Member] | Indianapolis Power And Light Company
Debt Instrument [Line Items]
Unamortized discounts	(6,400)	6,700
Face Value	455,000	0
Fair Value	$ 455,000	$ 0