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Debt (Schedule Long-Term Indebtedness) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Apr. 14, 2020
Debt Instrument [Line Items]
Unamortized discount - net	$ (6,400)	$ (6,600)
Debt Issuance Costs, Net	(25,200)	(26,000)
Long-term debt	2,652,186	2,651,185
Current portion of long-term debt	0	94,907
Long-term debt	2,652,186	2,556,278
Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Unamortized discount - net	(527)	(625)
Debt Issuance Costs, Net	(7,319)	(8,600)
Long-term debt	872,154	870,775
Current portion of long-term debt	0	0
Long-term debt	872,154	870,775
Ipalco Enterprises, Inc. [Member] \| Bank Term Loan Maturing July 2020 [Member]
Debt Instrument [Line Items]
Long-term debt			$ 65,000
Ipalco Enterprises, Inc. [Member] \| Three Point Seven Zero Percent Senior Secured Notes [Domain]
Debt Instrument [Line Items]
Long-term debt	$ 405,000	405,000
Debt, stated interest rate	3.70%
Ipalco Enterprises, Inc. [Member] \| Four Point Two Five Percent Senior Secured Notes
Debt Instrument [Line Items]
Long-term debt	$ 475,000	475,000
Debt, stated interest rate	4.25%
Indianapolis Power And Light Company
Debt Instrument [Line Items]
First mortgage bonds	$ 1,780,032	1,780,410
Unamortized discount - net	(5,855)	(6,006)
Debt Issuance Costs, Net	(17,900)	(17,400)
Long-term debt	1,780,032	1,780,410
Current portion of long-term debt	0	94,907
Long-term debt	1,780,032	1,685,503
Indianapolis Power And Light Company \| First Mortgage Bond 3.875% Due August 2021 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 0	55,000
Debt, stated interest rate	3.875%
Indianapolis Power And Light Company \| First Mortgage Bond 3.875% Due August 2021 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 0	40,000
Debt, stated interest rate	3.875%
Indianapolis Power And Light Company \| First Mortgage Bond 4.55% Due December 2024 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 40,000	40,000
Debt, stated interest rate	3.125%
Indianapolis Power And Light Company \| First Mortgage Bond 6.60% Due January 2034 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 100,000	100,000
Debt, stated interest rate	6.60%
Indianapolis Power And Light Company \| First Mortgage Bond 6.05% Due October 2036 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 158,800	158,800
Debt, stated interest rate	6.05%
Indianapolis Power And Light Company \| First Mortgage Bond 6.60% Due June 2037 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 165,000	165,000
Debt, stated interest rate	6.60%
Indianapolis Power And Light Company \| First Mortgage Bond 4.875% Due November 2041 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 140,000	140,000
Debt, stated interest rate	4.875%
Indianapolis Power And Light Company \| First Mortgage Bond 4.65% Due June 2043 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 170,000	170,000
Debt, stated interest rate	4.65%
Indianapolis Power And Light Company \| First Mortgage Bond 4.70% Due September 2045 [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 130,000	130,000
Debt, stated interest rate	4.50%
Indianapolis Power And Light Company \| First Mortgage Bond Nineteen [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 260,000	260,000
Debt, stated interest rate	4.70%
Indianapolis Power And Light Company \| FMB Twenty [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 350,000	350,000
Debt, stated interest rate	4.05%
Indianapolis Power And Light Company \| FMB Twenty - one [Member]
Debt Instrument [Line Items]
First mortgage bonds	$ 105,000	105,000
Debt, stated interest rate	4.875%
Indianapolis Power And Light Company \| FMB Twenty - two
Debt Instrument [Line Items]
First mortgage bonds	$ 30,000	$ 30,000
Debt, stated interest rate	0.75%	0.75%
Indianapolis Power And Light Company \| FMB Twenty - three
Debt Instrument [Line Items]
First mortgage bonds	$ 60,000	$ 60,000
Debt, stated interest rate	0.95%	0.95%
Indianapolis Power And Light Company \| FMB Twenty - Four
Debt Instrument [Line Items]
First mortgage bonds	$ 55,000	$ 0
Debt, stated interest rate	1.40%
Indianapolis Power And Light Company \| FMB Twenty - five
Debt Instrument [Line Items]
First mortgage bonds	$ 40,000	0
Debt, stated interest rate	0.65%
Secured Debt [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Unamortized discount - net	$ (5,855)
Debt Issuance Costs, Net	$ (17,913)	$ (17,384)