Income Taxes (Narrative) (Details) - USD ($)		12 Months Ended
	Mar. 25, 2014	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Entity Information [Line Items]
Income taxes			$ 27,500,000	$ 27,000,000	$ 29,600,000
Additional reduction to the state corporate income tax rate	1.60%
Reduction to the state corporate income tax rate	2.00%
Statutory state income tax rate			5.075%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	21.00%	21.00%
Unrecognized Tax Benefits			$ 0	$ 7,368,000	$ 7,056,000	$ 7,056,000
Indianapolis Power And Light Company
Entity Information [Line Items]
Income taxes			$ 40,800,000	$ 27,000,000	$ 37,400,000
Additional reduction to the state corporate income tax rate	1.60%
Reduction to the state corporate income tax rate	2.00%
Statutory state income tax rate			5.075%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	21.00%	21.00%
Unrecognized Tax Benefits			$ 0	$ 7,368,000	$ 7,056,000	$ 7,056,000
Scenario, Forecast [Member]
Entity Information [Line Items]
Statutory state income tax rate		4.90%
Scenario, Forecast [Member] | Indianapolis Power And Light Company
Entity Information [Line Items]
Statutory state income tax rate		4.90%