Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at January 1	$ 7,368,000	$ 7,056,000	$ 7,056,000
Gross increases - current period tax positions	0	312,000	0
Gross decreases - prior period tax positions	(7,368,000)	0	0
Unrecognized tax benefits at December 31	0	7,368,000	7,056,000
Indianapolis Power And Light Company
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at January 1	7,368,000	7,056,000	7,056,000
Gross increases - current period tax positions	0	312,000	0
Gross decreases - prior period tax positions	(7,368,000)	0	0
Unrecognized tax benefits at December 31	$ 0	$ 7,368,000	$ 7,056,000