Schedule II - Valuation And Qualifying Accounts And Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 3,155	$ 2,053	$ 2,821
Charged to Income	3,940	5,861	4,760
Net Write-offs	6,448	3,627	5,528
Balance at End of Period	647	3,155	2,053
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	0	(1,132)	0
SEC Schedule, 12-09, Reserve, Inventory
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	6,133	6,204	0
Charged to Income	758	0	6,204
Net Write-offs	3,784	71	0
Balance at End of Period	3,107	6,133	6,204
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	0	0	0
Indianapolis Power And Light Company | SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	3,155	2,053	2,821
Charged to Income	3,940	5,861	4,760
Net Write-offs	6,448	3,627	5,528
Balance at End of Period	647	3,155	2,053
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	0	(1,132)	0
Indianapolis Power And Light Company | SEC Schedule, 12-09, Reserve, Inventory
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	6,133	6,204	0
Charged to Income	758	0	6,204
Net Write-offs	3,784	71	0
Balance at End of Period	3,107	6,133	6,204
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	$ 0	$ 0	$ 0