Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 48,552	$ 33,599	$ 30,681
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	132,393	134,025	108,793
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	240,314	232,332	208,451
Amortization of deferred financing costs and debt premium	4,109	3,975	4,202
Deferred income taxes and investment tax credit adjustments - net	15,277	(15,735)	(3,506)
Loss on early extinguishment of debt	0	0	8,875
Allowance for equity funds used during construction	(3,486)	(8,477)	(25,798)
Change in certain assets and liabilities:
Accounts receivable	6,469	(9,944)	(3,028)
Inventories	13,574	(3,652)	(5,342)
Accounts payable	(3,047)	(3,675)	12,917
Accrued and other current liabilities	4,413	(10,532)	97
Accrued taxes payable/receivable	(15,698)	3,180	(785)
Accrued interest	544	458	1,791
Pension and other postretirement benefit expenses	5,414	(30,740)	(14,069)
Short-term and long-term regulatory assets and liabilities	921	76,647	17,011
Prepayments and other current assets	(2,119)	4,711	(553)
Other - net	(7,357)	1,089	2,038
Net cash provided by operating activities	397,815	381,012	285,260
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(213,619)	(224,335)	(218,224)
Project development costs	(2,269)	(1,127)	(1,729)
Cost of removal and regulatory recoverable ARO payments	(21,838)	(29,543)	(16,802)
Other	278	1,053	323
Net cash used in investing activities	(237,448)	(253,952)	(236,432)
CASH FLOWS FROM FINANCING ACTIVITIES:
Short-term debt borrowings	10,000	100,000	202,500
Short-term debt repayments	(10,000)	(248,000)	(129,150)
Long-term borrowings, net of discount	0	169,936	404,633
Retirement of long-term debt, including early payment premium	0	0	(408,152)
Dividends on common stock	(136,426)	(130,179)	(105,144)
Dividends on preferred stock	(3,213)	(3,213)	(3,213)
Deferred financing costs paid	0	(1,067)	(3,709)
Payments for financed capital expenditures	(5,623)	(11,429)	(10,637)
Other	(152)	(190)	(228)
Net cash used in financing activities	(145,414)	(124,142)	(53,100)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	14,953	2,918	(4,272)
Cash, cash equivalents and restricted cash at end of period	48,152	33,199
Cash paid during the period for:
Interest (net of amount capitalized)	117,457	90,975	94,781
Income taxes	29,600	28,275	65,050
Non-cash investing activities:
Accruals for capital expenditures	35,471	47,553	45,322
Indianapolis Power And Light Company
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	42,589	27,234
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	157,277	157,363	136,515
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	240,314	232,332	208,451
Amortization of deferred financing costs and debt premium	2,262	2,011	2,199
Deferred income taxes and investment tax credit adjustments - net	15,120	(15,646)	(3,441)
Allowance for equity funds used during construction	(3,486)	(8,477)	(25,798)
Change in certain assets and liabilities:
Accounts receivable	6,504	(10,167)	(3,031)
Inventories	13,574	(3,652)	(5,342)
Accounts payable	(2,816)	(4,080)	5,048
Accrued and other current liabilities	4,416	(9,655)	(7,771)
Accrued taxes payable/receivable	(15,437)	3,180	(785)
Accrued interest	546	826	(245)
Pension and other postretirement benefit expenses	5,414	(30,740)	(14,069)
Short-term and long-term regulatory assets and liabilities	921	76,647	17,011
Prepayments and other current assets	(2,119)	7,279	(4,938)
Other - net	(7,053)	582	2,257
Net cash provided by operating activities	421,069	405,963	295,965
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(213,619)	(224,335)	(218,224)
Project development costs	(2,269)	(1,127)	(1,729)
Cost of removal and regulatory recoverable ARO payments	(21,838)	(29,543)	(16,802)
Other	0	0	(123)
Net cash used in investing activities	(237,726)	(255,005)	(236,878)
CASH FLOWS FROM FINANCING ACTIVITIES:
Short-term debt borrowings	10,000	100,000	202,500
Short-term debt repayments	(10,000)	(248,000)	(129,150)
Long-term borrowings, net of discount	0	104,936	0
Dividends on common stock	(159,000)	(142,250)	(132,516)
Dividends on preferred stock	(3,213)	(3,213)	(3,213)
Proceeds from Contributions from Parent	0	65,000	0
Payments for financed capital expenditures	(5,623)	(11,429)	(10,637)
Other	(152)	(1,110)	(336)
Net cash used in financing activities	(167,988)	(136,066)	(73,352)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	15,355	14,892
Cash and Cash Equivalents, Period Increase (Decrease)			(14,265)
Cash, cash equivalents and restricted cash at end of period	42,189	26,834
Cash paid during the period for:
Interest (net of amount capitalized)	88,546	61,310	63,031
Income taxes	37,400	33,750	87,000
Non-cash investing activities:
Accrual for Capital Expenditures	$ 35,471	$ 47,553	$ 45,322