Debt (Schedule Long-Term Indebtedness) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Unamortized discount - net	$ (6,768)
Debt Issuance Costs, Net	(23,612)
Long-term debt	3,003,420	$ 3,000,450
Current portion of long-term debt	445,000	0
Long-term debt	2,558,420	3,000,450
First Mortgage Bond Twenty Two
Debt Instrument [Line Items]
First mortgage bonds	350,000
Long-term debt	345,600
Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Unamortized discount - net	(319)	(425)
Debt Issuance Costs, Net	(4,554)	(5,912)
Debt, Long-Term and Short-Term, Combined Amount	875,127	873,663
Long-term debt	470,653	873,663
Current portion of long-term debt	405,000	0
Long-term debt	470,127	873,663
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	$ 2,128,293	2,126,787
Unamortized discount - net	(6,449)	(6,651)
Debt Issuance Costs, Net	(20,200)	(20,400)
Long-term debt	2,128,293	2,126,787
Current portion of long-term debt	40,000	0
Long-term debt	2,088,293	2,126,787
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%
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%
Indianapolis Power And Light Company | FMB Twenty - Four
Debt Instrument [Line Items]
First mortgage bonds	$ 55,000	55,000
Debt, stated interest rate	1.40%
Indianapolis Power And Light Company | FMB Twenty - five
Debt Instrument [Line Items]
First mortgage bonds	$ 40,000	40,000
Debt, stated interest rate	0.65%
Indianapolis Power And Light Company | First Mortgage Bond Twenty Two
Debt Instrument [Line Items]
First mortgage bonds	$ 350,000	350,000
Long-term debt	$ 345,600
Debt, stated interest rate	5.65%
Secured Debt [Member] | Indianapolis Power And Light Company
Debt Instrument [Line Items]
Unamortized discount - net	$ (6,449)
Debt Issuance Costs, Net	$ (19,058)	$ (20,362)