Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2025

Schedule of Regulatory Assets and Liabilities [Table Text Block]

The following table presents AES Ohio’s regulatory assets and liabilities:

	Type of Recovery	Recovery Period	December 31,
$ in millions			2025		2024
Regulatory assets, current:
Undercollections to be collected through rate riders	A/B	2026	$	52.2	$	63.4
Costs being recovered through basic rates and charges	B	2026	7.2		4.8
Transmission formula rate debits	A	2026	1.7		13.8
Total regulatory assets, current			61.1		82.0
Regulatory assets, non-current:
Pension benefits	A	Ongoing	49.8		58.8
Undercollections to be collected through rate riders	A/B/C	Various	60.4		65.9
Costs being recovered through basic rates and charges	B	2030	17.0		13.6
Unamortized loss on reacquired debt	B	Ongoing	—		0.5
Transmission formula rate debits	A	2027	10.2		1.2
Total regulatory assets, non-current			137.4		140.0
Total regulatory assets			$	198.5	$	222.0
Regulatory liabilities, current:
Overcollection and other credits being passed:
to customers through rate riders	A	2026	0.2		9.3
to customers through transmission rates	A	2026	1.6		1.0
Total regulatory liabilities, current			1.8		10.3
Regulatory liabilities, non-current:
ARO and accrued asset removal costs		Not Applicable	139.9		131.0
Deferred income taxes payable to customers through rates		Ongoing	44.4		35.0
Overcollection and other credits being passed:
to customers through rate riders	B	2027	2.3		—
to customers through transmission rates	A	2026	—		1.5
Other non-current regulatory liabilities	B/C	Ongoing	2.9		1.9
Total regulatory liabilities, non-current			189.5		169.4
Total regulatory liabilities			$	191.3	$	179.7

A – Recovery of incurred costs plus rate of return. Refund of incurred credits, plus rate of return.

B – Recovery of incurred costs without a rate of return. Refund of incurred credits without a rate of return.

C – Recovery or refund not determined, but is probable of occurring in future rate proceedings.