Consolidated Statements Of Common Shareholders' Equity (Deficit) And Noncontrolling Interest - USD ($) $ in Thousands	Total	Corporate Stocks - Common [Member]	Paid In Capital [Member]	AOCI Attributable to Parent [Member]	Accumulated Deficit [Member]	Cumulative Preferred Stock Of Subsidiary [Member]	Indianapolis Power And Light Company	Indianapolis Power And Light Company Corporate Stocks - Common [Member]	Indianapolis Power And Light Company Paid In Capital [Member]	Indianapolis Power And Light Company Accumulated Deficit [Member]	Indianapolis Power And Light Company Cumulative Preferred Stock Of Subsidiary [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding	108,907,000						17,207,000
Stockholders' Equity Attributable to Parent	$ 520,988	$ 0	$ 588,966	$ (43,420)	$ (24,558)		$ 1,424,893	$ 324,537	$ 664,886	$ 435,470
Equity, Attributable to Noncontrolling Interest						$ 59,784
Other Comprehensive Income (Loss), Net of Tax	14,013			14,013	0
Net income / (loss)	115,969				119,182		147,030
Preferred Stock Dividends, Income Statement Impact	3,213						3,213				$ 3,213
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(3,213)				(3,213)	(3,213)	(3,213)				(3,213)
Distributions to AES	(131,476)				(115,969)
Contributions from shareholders	275,000		275,000				275,000		275,000
Beginning Balance at Dec. 31, 2020											59,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Partners' Capital Account, Return of Capital			(15,507)
Net income	119,182						150,243			150,243
Dividends, Preferred Stock										3,213
Return of Capital			(15,500)
Cash dividends declared on common stock							(155,700)			(155,700)
Equity contributions from shareholders	275,000
Other	106		106				$ 107		107
Ending Balance at Dec. 31, 2021											59,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	$ 119,182
Common Stock, Shares, Outstanding	108,907,000						17,207,000
Stockholders' Equity Attributable to Parent	$ 794,600		848,565	(29,407)	(24,558)		$ 1,691,330	324,537	939,993	426,800
Equity, Attributable to Noncontrolling Interest						59,784
Other Comprehensive Income (Loss), Net of Tax	51,676			51,676	0
Net income / (loss)	93,117				96,626		126,466
Preferred Stock Dividends, Income Statement Impact	3,509						3,509				3,213
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(3,213)				(3,213)	(3,213)	(3,213)				(3,213)
Distributions to AES	(101,986)				(68,667)
Contributions from shareholders	253,000		253,000				253,000		253,000
Partners' Capital Account, Return of Capital			(33,319)
Net income	96,626						129,975			129,975
Dividends, Preferred Stock	3,213									3,213
Stock Redeemed or Called During Period, Value	(296)				(296)	(59,784)	(296)			(296)	(59,784)
Return of Capital			(33,300)
Cash dividends declared on common stock							(127,200)			(127,200)
Equity contributions from shareholders	253,000
Other	111		111				114		114
Ending Balance at Dec. 31, 2022	1,090,518						$ 1,943,710				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	$ 96,626
Common Stock, Shares, Outstanding	108,907,000						17,207,000
Stockholders' Equity Attributable to Parent	$ 1,090,518		1,068,357	22,269	(108)		$ 1,943,710	324,537	1,193,107	426,066
Equity, Attributable to Noncontrolling Interest	0					0	0
Other Comprehensive Income (Loss), Net of Tax	7,025			7,025	0
Net income / (loss)	83,120				83,120		116,190
Preferred Stock Dividends, Income Statement Impact	0						0				0
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	0						0
Distributions to AES	(104,287)				(57,830)
Contributions from shareholders							0		0
Partners' Capital Account, Return of Capital			(46,457)
Net income	57,027						90,097
Dividends, Preferred Stock	0						3,200
Return of Capital			(46,500)
Cash dividends declared on common stock							(140,200)			(140,200)
Proceeds from Noncontrolling Interests	79,347						79,347
Equity contributions from shareholders	0
Other	92		92				92		92
Ending Balance at Dec. 31, 2023	1,129,722						1,973,046				$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent							116,190			116,190
Net Income (Loss) Attributable to Noncontrolling Interest	(26,093)						$ (26,093)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	$ 83,120
Common Stock, Shares, Outstanding	108,907,318						17,206,630
Stockholders' Equity Attributable to Parent	$ 1,076,468		$ 1,021,992	$ 29,294	$ 25,182		$ 1,919,792	$ 324,537	$ 1,193,199	$ 402,056
Equity, Attributable to Noncontrolling Interest	$ 53,254					$ 0	$ 53,254