Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Regulated Operations [Abstract]

Regulatory Assets and Liabilities

The Company has recorded regulatory assets and liabilities (in millions) that it expects to pass through to its customers in accordance with, and subject to, regulatory provisions as follows:

December 31,	2023		2022		Recovery/Refund Period
Regulatory assets
Current regulatory assets:
Undercollection of rate riders	$	127	$	65	1 year
El Salvador energy pass through costs recovery	119		78		Quarterly
AES Indiana deferred fuel and purchased power costs	—		80		1 year
Other	19		14		1 year
Total current regulatory assets	265		237
Noncurrent regulatory assets:
AES Indiana Petersburg Units 1 and 2 retirement costs	260		287		10 years
AES Indiana and AES Ohio defined benefit pension obligations (1)	179		194		Various
AES Indiana environmental costs	70		73		Various
AES Ohio regulatory compliance costs	45		6		5 years
AES Indiana deferred Midcontinent ISO costs	21		34		3 years
Other	123		130		Various
Total noncurrent regulatory assets	698		724
Total regulatory assets	$	963	$	961
Regulatory liabilities
Current regulatory liabilities:
Overcollection of costs to be passed back to customers	$	34	$	46	1 year
Other	7		18		1 year
Total current regulatory liabilities	41		64
Noncurrent regulatory liabilities:
AES Indiana and AES Ohio accrued costs of removal and AROs	586		657		Over life of assets
AES Indiana and AES Ohio income taxes payable to customers through rates	117		134		Various
Other	6		22		Various
Total noncurrent regulatory liabilities	709		813
Total regulatory liabilities	$	750	$	877

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(1)Past expenditures on which the Company earns a rate of return.