Income Taxes (Schedule Of Federal And State Income Taxed Charged To Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Less: income tax expense	$ 28,941	$ 28,592	$ 35,528
Charged To Utility Operating Expense [Member]
Income Taxes [Line Items]
Current income taxes, Federal	28,100	19,489	17,229
Current income taxes, State	8,218	6,249	3,022
Total current income taxes	36,318	25,738	20,251
Deferred income taxes, Federal	(7,286)	323	7,547
Deferred income taxes, State	(91)	2,531	7,745
Total deferred income taxes	(7,377)	2,854	15,292
Net amortization of investment credit	0	0	(15)
Less: income tax expense	28,941	28,592	35,528
Indianapolis Power And Light Company
Income Taxes [Line Items]
Less: income tax expense	39,305	40,134	43,430
Indianapolis Power And Light Company | Charged To Utility Operating Expense [Member]
Income Taxes [Line Items]
Current income taxes, Federal	36,353	28,395	23,941
Current income taxes, State	10,325	8,661	4,370
Total current income taxes	46,678	37,056	28,311
Deferred income taxes, Federal	(7,283)	503	7,578
Deferred income taxes, State	(90)	2,576	7,556
Total deferred income taxes	(7,373)	3,079	15,134
Net amortization of investment credit	0	0	(15)
Less: income tax expense	$ 39,305	$ 40,135	$ 43,430