Consolidated Statements Of Common Shareholders' Equity (Deficit) And Noncontrolling Interest - USD ($) $ in Thousands	Total	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]
Other Comprehensive Income (Loss), Net of Tax	$ (19,750)		$ (19,750)
Beginning Balance at Dec. 31, 2018	573,266	$ 597,824		$ (24,558)	$ 59,784	$ 1,429,229	$ 324,537	$ 664,513	$ 440,179	$ 59,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income applicable to common stock	129,180			129,180		154,064
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	109,430
Preferred Stock Dividends, Income Statement Impact	3,213				3,213	3,213				3,213
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	3,213				3,213	3,213				3,213
Net income	132,393					157,277			157,277
Dividends, Preferred Stock									3,213
Return of Capital		(7,246)
Cash dividends declared on common stock						(159,000)			(159,000)
Distributions to AES	(136,426)			(129,180)
Proceeds from Contributed Capital	0
Other	206	206				206		206
Ending Balance at Dec. 31, 2019	546,476	590,784	(19,750)	(24,558)	59,784	1,424,499	324,537	664,719	435,243	59,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from Contributions from Parent						0
Other Comprehensive Income (Loss), Net of Tax	(23,670)		(23,670)
Net income applicable to common stock	106,754			106,754		140,827
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	83,084
Preferred Stock Dividends, Income Statement Impact	3,213				3,213	3,213				3,213
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	3,213				3,213	3,213				3,213
Net income	109,967					144,040			144,040
Dividends, Preferred Stock									3,213
Return of Capital		(1,985)
Cash dividends declared on common stock						(140,600)			(140,600)
Distributions to AES	(108,739)			(106,754)
Proceeds from Contributed Capital	0
Other	167	167				167		167
Ending Balance at Dec. 31, 2020	520,988	588,966	(43,420)	(24,558)	59,784	1,424,893	324,537	664,886	435,470	59,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from Contributions from Parent						0
Other Comprehensive Income (Loss), Net of Tax	14,013		14,013
Net income applicable to common stock	115,969			115,969		147,030
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	129,982
Preferred Stock Dividends, Income Statement Impact	3,213				3,213	3,213				3,213
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	3,213				3,213	3,213				3,213
Net income	119,182					150,243			150,243
Dividends, Preferred Stock						3,200			3,213
Return of Capital		(15,507)
Cash dividends declared on common stock						(155,700)			(155,700)
Distributions to AES	(131,476)			(115,969)
Proceeds from Contributed Capital	275,000	275,000
Other	106	106				107		107
Ending Balance at Dec. 31, 2021	$ 794,600	$ 848,565	$ (29,407)	$ (24,558)	$ 59,784	1,691,330	$ 324,537	939,993	$ 426,800	$ 59,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from Contributions from Parent						$ 275,000		$ 275,000