Fair Value (Schedule Of Face And Fair Value Of Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 6,400	$ 6,600
Face Value	2,743,800	2,758,800
Fair Value	3,229,118	3,370,588
Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	5,855	6,006
Face Value	1,863,800	1,878,800
Fair Value	2,282,772	2,377,973
Fixed Rate [Member]
Debt Instrument [Line Items]
Face Value	2,683,800	2,683,800
Fair Value	3,169,118	3,295,588
Fixed Rate [Member] | Indianapolis Power And Light Company
Debt Instrument [Line Items]
Face Value	1,803,800	1,803,800
Fair Value	2,222,772	2,302,973
Variable Rate [Member]
Debt Instrument [Line Items]
Face Value	60,000	75,000
Fair Value	60,000	75,000
Variable Rate [Member] | Indianapolis Power And Light Company
Debt Instrument [Line Items]
Face Value	60,000	75,000
Fair Value	$ 60,000	$ 75,000