Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2019

Entity Information [Line Items]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

	2021		2020		Recovery Period
	(In Thousands)
Regulatory Assets
Current:
Undercollections of rate riders	$	49,998	$	31,569	Approximately 1 year(1)
Costs being recovered through basic rates and charges	13,815		13,861		Approximately 1 year(1)
Total current regulatory assets	63,813		45,430
Long-term:
Unrecognized pension and other
postretirement benefit plan costs	114,887		149,374		Various(2)
Deferred MISO costs	47,875		61,267		Through 2026(1)
Unamortized Petersburg Unit 4 carrying
charges and certain other costs	4,921		5,975		Through 2026(1)(3)
Unamortized reacquisition premium on debt	15,703		17,018		Over remaining life of debt
Environmental projects	71,201		74,637		Through 2046(1)(3)
COVID-19	5,426		6,391		To be determined
TDSIC projects	8,540		2,747		36.3 years(1)(3)
Petersburg Unit 1 and 2 retirement costs	300,067		74,545		Through 2034(1)(3)
Hardy Hills Solar Project	2,907		—		To be determined
Petersburg Solar Project	881		—		To be determined
Fuel costs	83,513		—		To be determined
Other miscellaneous	1,056		847		Various(4)
Total long-term regulatory assets	656,977		392,801
Total regulatory assets	$	720,790	$	438,231
Regulatory Liabilities
Current:
Overcollections and other credits being passed
to customers through rate riders	$	3,006	$	29,493	Approximately 1 year(1)
FTRs	1,235		543		Approximately 1 year(1)
Total current regulatory liabilities	4,241		30,036
Long-term:
ARO and accrued asset removal costs	722,774		723,897		Not applicable
Deferred income taxes payable to customers through rates	100,171		112,957		Various
Other miscellaneous	3,764		2,506		To be determined
Total long-term regulatory liabilities	826,709		839,360
Total regulatory liabilities	$	830,950	$	869,396

(1)Recovered (credited) per specific rate orders

(2)AES Indiana receives a return on its discretionary funding

(3)Recovered with a current return

(4) The majority of these costs are being recovered in basic rates and charges through 2026. For the remainder, recovery is probable, but the

timing is not yet determined.

(5) Recovered per regulatory precedent.

Indianapolis Power And Light Company

Entity Information [Line Items]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

	2021		2020		Recovery Period
	(In Thousands)
Regulatory Assets
Current:
Undercollections of rate riders	$	49,998	$	31,569	Approximately 1 year(1)
Costs being recovered through basic rates and charges	13,815		13,861		Approximately 1 year(1)
Total current regulatory assets	63,813		45,430
Long-term:
Unrecognized pension and other
postretirement benefit plan costs	114,887		149,374		Various(2)
Deferred MISO costs	47,875		61,267		Through 2026(1)
Unamortized Petersburg Unit 4 carrying
charges and certain other costs	4,921		5,975		Through 2026(1)(3)
Unamortized reacquisition premium on debt	15,703		17,018		Over remaining life of debt
Environmental projects	71,201		74,637		Through 2046(1)(3)
COVID-19	5,426		6,391		To be determined
TDSIC projects	8,540		2,747		36.3 years(1)(3)
Petersburg Unit 1 and 2 retirement costs	300,067		74,545		Through 2034(1)(3)
Hardy Hills Solar Project	2,907		—		To be determined
Petersburg Solar Project	881		—		To be determined
Fuel costs	83,513		—		To be determined
Other miscellaneous	1,056		847		Various(4)
Total long-term regulatory assets	656,977		392,801
Total regulatory assets	$	720,790	$	438,231
Regulatory Liabilities
Current:
Overcollections and other credits being passed
to customers through rate riders	$	3,006	$	29,493	Approximately 1 year(1)
FTRs	1,235		543		Approximately 1 year(1)
Total current regulatory liabilities	4,241		30,036
Long-term:
ARO and accrued asset removal costs	722,774		723,897		Not applicable
Deferred income taxes payable to customers through rates	100,171		112,957		Various
Other miscellaneous	3,764		2,506		To be determined
Total long-term regulatory liabilities	826,709		839,360
Total regulatory liabilities	$	830,950	$	869,396

(1)Recovered (credited) per specific rate orders

(2)AES Indiana receives a return on its discretionary funding

(3)Recovered with a current return

(4) The majority of these costs are being recovered in basic rates and charges through 2026. For the remainder, recovery is probable, but the

timing is not yet determined.

(5) Recovered per regulatory precedent.